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VMware blogs and VMware employee personal blogs on virtualization

November 22, 2008

SRM, it’s just too easy » Yellow Bricks

VMTN Blog

Duncan over at Yellow Bricks has some words of wisdom for your BCDR project.

SRM, it’s just too easy » Yellow Bricks.
There a whole bunch of SRM projects going on globally where VMware PSO, the department I work for, is assisting. These projects typically have a duration of 3 to 9 months, while it seems that with the ease of VMware Site Recovery Manager this should be a matter of days.

People tend to forget that the most important thing about Distaster Recovery / Business Continuity is the business. You need to know the organisation and IT environment very well before you can even start ...

The fact that SRM is so easy to setup makes it really hard to actually explain to a customer why a BCDR project will take much longer then he expected.

by John Troyer at November 22, 2008 01:38 AM

November 21, 2008

Tip: Switch Virtual Disk Type

Team Fusion

Hard_disk_settings Now that you're familiar with sparse, preallocated, split, and monolithic virtual disks, you might be wondering how to switch from one format to another. In Fusion 2.0, this can be done through the virtual machine's Hard Disk settings pane - select the options you want, then press Apply. Fusion will convert the disk's format to the one you specified.

As usual, you can do this only if you don't have any snapshots, and you will potentially need as much free space as the maximum size of the virtual disk.

by Eric Tung at November 21, 2008 08:18 PM

November 20, 2008

VI, SRM in a (Workstation) Box

VMTN Blog

There are a few sets of instructions floating around the Internet on how to run ESX or ESXi inside Workstation 6.5. (Let me Google that for you or just go to xtravirt) Lots of reasons you'd want to do this -- for training, testing, lab work, demos, POCs, or even just as a parlor trick to impress your friends. You'll need recent hardware. Now David Davis has published a nice 14 minute video tutorial on the topic at Petri IT Knowledgebase. Link: Running VMware ESX 3.5 and ESXi in Workstation on your desktop PC.

Site Recovery Manager can be hard to evaluate -- you need some shared storage that is going to be replicated and then set up SRM to do all the tricky failover workflow bits. Tomas Ten Dam has laid out a process to set that up in Workstation as well using the NetApp ONTAP simulator: SRM in a Box final release (the complete setup) « Ten Dam. (Looks like you need to be a current NetApp customer to get your hands on it. You should also be able to do this with the EMC Celerra simulator, same conditions apply. Looks like you can do SRM with Lefthand VSA as well, and you can at least do that with a 30-day trial. Has anybody set this up with a free or open source, albeit unsupported, tool? How about a set of virtual appliances?)

Completely new to SRM? Check out this new video (parts 2 and 3 coming soon).

[Update: from Chad Sakac in the comments, the Celerra simulator is available to everybody.]

by John Troyer at November 20, 2008 07:41 AM

November 19, 2008

VMware Fusion 2.0.1 Update Available

Team Fusion

images Happy Friday everyone!

This is a quick note to let you know that VMware Fusion 2.01 is now available, a free maintenance update to VMware Fusion 2. 

You can download the new bits here.

VMware Fusion 2.0.1 features enhancements and fixes in follow up to the release of VMware Fusion 2 and the Apple notebook refresh.

You can read all about it in the release notes, but some quick things of interest:

  • One of my favorites: AutoProtect postpones taking a snapshot when the user is interacting with the virtual machine. Watch a video demo of AutoProtect, here.
  • Now shows application badge instead of generic document icons when assigning Windows applications to Mac documents.
  • Greatly reduced initial pause when opening mirrored or shared folders.
  • No longer disables certain shared folders and mirrored folders that were nested folders. The potential data loss issue with nested shared folders has been resolved.
  • No longer publishes Windows guest applications to Mac if “Allow the virtual machine to open applications on your Mac” is unchecked in virtual machine Settings > Sharing.
  • Brings back the Enable Hints menu item in Help menu.

There are more enhancements and bug fixes 100% broken out the release notes, here.

In the meantime, go get the bits!

by Pete Kazanjy at November 19, 2008 08:07 PM

Tip: Control-click

Team Fusion

Unlike OS X, most other operating systems require the use of multibutton mice. Most Mac users know you can ctrl-click to simulate a right click, and you can do that in Fusion as well. But what if you actually want to ctrl-click in the guest - say, to select multiple items in Explorer?

Mouseshortcuts In Fusion's Preferences, go to the Keyboard & Mouse tab, Mouse Shortcuts. Uncheck the secondary button shortcut (or map it to something else) - now you can ctrl-click in the guest.

If you still need to right click and don't want to remap to a different shortcut, there may be other options. For laptop users, you can enable two-finger right clicks in System Preferences > Keyboard & Mouse > Trackpad. If you have a Mighty Mouse, you can enable right click in System Preferences > Keyboard & Mouse > Mouse. And of course, since OS X has always supported multibutton mice, you can always plug in your favorite multibutton mouse.

by Eric Tung at November 19, 2008 01:25 PM

Communities Podcast Wednesday - open topic

VMTN Blog

Drop by the Communities Roundtable Podcast tomorrow. It's an open topic day, meaning we'll talk about whatever we feel like. We'll talk about whatever you feel like as well. Listen in and join the conversation.

Some interesting things went on this week. Let's go over to Planet V12n and see...

by John Troyer at November 19, 2008 03:14 AM

Virtualization Team vs. Security Team: It is important to remove the “vs.”!

VMTN Blog

Rob Randell, one of our security specialists here at VMware, is guest-posting over at Mike D's blog. (Guys, you're welcome over here as well.)

Link: Mike D's Virtualization Blog: Virtualization Team vs. Security Team: It is important to remove the “vs.”!.

Unfortunately, very often this situation is the exception and not the rule. Many of the customers that I talk to are only talking to me because they have started a widescale deployment of VMware VI and the security team gets wind of it once it is well underway or worse some sort of audit is initiated (PCI, Sarbox, HIPAA, etc…). At this point the entire architecture needs to be reviewed and very often rearchitected to meet the necessary security and audit requirements. See the following article for a great example of this.

(Emphasis mine.) Sounds like a nightmare, so my guess is that you don't want that to happen to you. Always consult your friendly neighborhood security team first.

by John Troyer at November 19, 2008 02:49 AM

Join the VMware Referral Program

VMTN Blog

We're pleased to announce a new VMware Referral Program that gives you rewards when you recommend VMware products to others. You can participate even without a blog or website, as we give you the tools to send custom emails or bug your friends on social networks, or if you do have a blog, you can get a spiffy widget like you see on the right, and you can customize what it says. (All rewards through this particular widget go to the Red Cross, by the way.) You're also giving out a special "friends & family" offer, which at this point is a 10% discount.

You get $10 credit (which can go straight to your PayPal account or to a gift card or charity) every time two VMware Store purchases are made from your referrals. (That $10 number tells me that we expect to moving more copies of Fusion and Workstation than VI Enterprise through this referral, but go crazy selling ESX if that's what you're into.) In any case, it's a great way to spread the word about the solutions you use every day that make your life easier and got you your last promotion.

So sign up now -- it takes 3 minutes to get started.

Thank you very much, and I hope you make a bunch of dough.

by John Troyer at November 19, 2008 02:35 AM

November 18, 2008

Call for bloggers at VMworld Europe 2009

VMTN Blog

Calling all bloggers going to VMworld Europe 2009. We really appreciate folks blogging from our conferences.

  • It helps to spread news and announcements.
  • It gets a lot of technical detail up on the public web so Google can find it.
  • It helps people who aren't on site feel more like they are there -- and hopefully come next time! It really is a very good tech conference for both beginners and experienced virtualizers.
  • It helps others create successful strategies for navigating the event, and it gives feedback to the conference team.
  • It helps continue to cement this global community of virtualization enthusiasts and VMware experts we are building.

Check out the coverage of VMworld 2008 if you weren't there, and you can see some past sessions on vmworld.com as well.

If you're going to show up in Cannes on February 24, please drop me a line (jtroyer @ vmware). Although we're going to reach out to folks we know in Europe, if you're outside of Europe but planning on coming or if you don't blog primarily in English, we might not know to ask, so please speak up.

I'm not making any promises, but last year the folks who were regularly blogging were treated very well by Richard, including custom shirts, a nice place with power and connectivity and refreshments to blog, press passes, and room to shoot video or do interviews. I highly recommend getting on Richard's list.

And if you aren't a current blogger, I don't think we can get you a press pass, but it's a fine time to start a blog. Remember you can always start a free one at vmworld.com/blogs or communities.vmware.com/blogs.

by John Troyer at November 18, 2008 02:58 AM

November 17, 2008

VMware Fusion 201: Split vs. Monolithic Virtual Disks

Team Fusion

In addition to the sparse and preallocated virtual disks, there's another, orthogonal set of options: split and monolithic. You can have a sparse/split virtual disk (the default in Fusion 2.0), a sparse/monolithic virtual disk (the default in Fusion 1.x), a preallocated/split virtual disk, or a preallocated/monolithic virtual disk.

While sparse vs. preallocated affects how the data inside the guest is stored in the .vmdk file, split vs. monolithic affects how the .vmdk file is stored on the host. In a monolithic virtual disk, everything in a virtual disk is kept in one file - this includes metadata about the virtual disk (e.g. size, geometry, parent disk, and so on). Note: You might still have multiple vmdk files in a virtual machine (either because you have multiple disks or because you have snapshots). The previous posts about sparse and preallocated virtual disks showed monolithic disks.

Split_sparse_virtual_disk In contrast, a split virtual disk is, well, split into multiple files. There's a small, plaintext metadata file, and a number of slice files. If you have a preallocated/split virtual disk, each slice (except possibly the last) will be 2 GB. If you have a sparse/split virtual disk, each slice can be up to 2 GB, depending on how much data falls into that slice. Preallocated/split virtual disks have a -f### suffix (where ### is a number), while sparse/split virtual disks use a -s### suffix.

So why choose one over the other? Split disks are critical in some cases - for example, some filesystems (such as FAT) can't deal with files larger than a certain size. By splitting virtual disks to be below this limit (typically 4 GB), you can keep a virtual machine on such a filesystem without losing data. Another advantage of split disks is that you don't need as much space to consolidate snapshots or shrink virtual disks. We try hard not to lose data, so rather than doing these operations in place (where something could go wrong if the power fails), we make a copy and only replace it when we're sure it succeeded. Because of this, if you use a monolithic disk, you might need as much free space as the virtual disk occupies to complete such an operation. On the other hand, with a split virtual disk, you only need 2 GB (or less, if you have a sparse slice that's smaller) since each slice can be done individually.

On the other hand, monolithic disks have some advantages too. In addition to more obvious limited computing resources such as CPU or disk space, one of the not as well known ones is something called file handles. OSes need to keep track of which files are being used, and has a limited number of file handles to do this with. If the OS runs out of file handles, no more files can be opened. Remember that you're using a lot more files than just the documents you're working on - programs need to open files to read resources, for temporary use, and lots of other not immediately obvious things. With a monolithic virtual disk, you use only one file handle per virtual disk. With a sparse virtual disk, you use one file handle per slice, which can quickly add up if you've got a large virtual disk with a lot of snapshots.

by Eric Tung at November 17, 2008 08:55 PM

November 14, 2008

VMware @ TechEd EMEA

VMTN Blog

Richard Garsthagen, evangelist extraordinaire, giving the VMware overview at Microsoft TechEd EMEA. It's a good short overview that gets past the "my hypervisor is better than yours" argument to talk about the entire suite of infrastructure and management software that we offer. Also, make sure you watch to the very end. Richard can be very, very sneaky.

Picture_4_2
(click for the video)

Richard is also coordinating the bloggers (and many other things) at VMworld Europe 2009. If you have a blog and are going to be in Cannes this February, drop me a line (jtroyer @ vmware).

by John Troyer at November 14, 2008 07:53 PM

Workstation in the running for developer.com product of the year

VMTN Blog

Most people don't know I'm actually a trained scientist. (I said a trained scientist, not necessarily a good one or a successful one, which is why I'm making my living hanging out with bloggers.) My scientific training usually comes out in overly-long emails where I detail every assumption and caveat and mitigating factor about some conclusion, which is how you'd write a scientific paper. My marketing training then usually kicks in and I edit out most of it, but I still suspect I lose a lot of people in my more epic missives.

So I am officially a Doctor, I've done some statistics tutoring in the past, and this Fall I really got into the political polling geekery at FiveThirtyEight. As a result, I've developed a great respect for a well-made survey -- knowing what to ask, who to ask, and how to analyze the results are not trivial matters That's the main reason I'm not pointing to Alessandro's platform survey over at virtualization.info. It's not a scientifically valid survey of the global virtualization community, just a web poll, but I will be interested in the results. We'll "win" in any case, but I'm more interested in the results if I don't skew it by sending over hordes of VMware users from this blog.

(And I also recognize that just because you print a number doesn't make it true.)

However, there are some polls and surveys where we so clearly deserve to win on the merits that I don't mind calling your attention to them. Workstation wins lots of awards, because it remains the gold standard for desktop virtualization and is insanely useful to working developers and sysadmins. So for your voting pleasure I will direct your attention to the developer.com Product of the Year survey. VMware Workstation 6.5 is up for Development Tool of the Year. Feel free to vote your conscience, as long as you do it before December 15.

by John Troyer at November 14, 2008 03:27 AM

10GigE Networking Performance with ESX 3.5

VMTN Blog

Link: VMware: VMware Networking Blog: 10GigE Networking Performance with ESX 3.5.

  1. Improving managability by reducing the cable and NIC sprawl. 2x 10GigE links versus 6, 8, 10 or more 1 GigE can simplify your infrastructure
  2. Convergence of Fibre Channel and Network traffic using FCoE (Fibre
    Channel over Ethernet). The ability to do away with Fibre Channel HBAs
    and converge the FC SAN traffic with the ethernet network traffic is
    the TCO tipping point for some customers. ...

But, ...how does 10GigE perform on ESX 3.5? Our performance team published a paper this week on that very theme.   


by John Troyer at November 14, 2008 03:21 AM

November 13, 2008

AppSpeed on Communities Roundtable podcast #25

VMTN Blog

The topic today was VMware AppSpeed, which began life as B-hive Conductor. From the website: "The product "provides virtual infrastructure groups visibility into the multi-tier applications (performance, usage and dependencies) running across both virtual and physical infrastructure." I think it's another example of how you can do something better virtually by sitting outside the VM -- something that would be either impractical, much harder, or hopelessly tied to the OS if you were doing it with an agent inside a physical machine.

Asaf Wexler, former CTO of B-hive and now Sr Director of R&D here at VMware, joined us over an unfortunately poor telephone connection from Israel. Click on the big green play button or download the mp3. (51:00). Podcast info.

Links:

  • http://www.bhive.net/ old B-hive site; still has product & technical info.
  • AppSpeed at VMworld 2008 keynote (more notes on that keynote)
  • AppSpeed video at VMworld 2008 keynote day 2
  • More AppSpeed video at VMworld 2008 keynote day 1
  • Commentary from Roger Howorth at ZDNet.co.uk

    As one attendee put it, this was really exciting because it would provide a quick way to find out where the problem was if users started complaining. Without this kind of technology, it could take hours to get enough insight into the application to enable further debugging. Also, the various departments responsible for the different elements in an application have a habit of denying responsibility and pointing the finger elsewhere.

    The kind of diagnostic information produced by AppSpeed makes this kind of behaviour easier to challenge, because administrators would have real data to back them up. For example, they could say, “Look, queries to your database are taking five seconds, while the rest of the transactions total 200 milliseconds.”

Next week, open topic roundtable with the panel. Drop by -- same bat time, same bat channel (noon Pacific time on Wednesday).

by VMTN at November 13, 2008 03:03 AM

November 12, 2008

10GigE Networking Performance with ESX 3.5

VMware Networking Blog

A few recent conversations with customers have quickly gravitated to the topic of 10 GigE. Some customers are making firms plans for deploying 10GigE in their ESX servers. The reasons vary, but top amongst these customers are:

  1. Improving managability by reducing the cable and NIC sprawl. 2x 10GigE links versus 6, 8, 10 or more 1 GigE can simplify your infrastructure
  2. Convergence of Fibre Channel and Network traffic using FCoE (Fibre Channel over Ethernet). The ability to do away with Fibre Channel HBAs and converge the FC SAN traffic with the ethernet network traffic is the TCO tipping point for some customers.

As you may be aware, FCoE is supported in ESX 3.5u2. Emulex and Qlogic 10 GigE FCoE CNAs (Channel Network Adapters) were qualified and added to our HCL just prior to VMworld in September. 

But, ...how does 10GigE perform on ESX 3.5? Our performance team published a paper this week on that very theme.   

by Guy Brunsdon at November 12, 2008 10:36 PM

Read about the financial meltdown and your VMware meltdown all in one place

VI Powershell Blog

If you're like me, and I know I am, you spend an hour or two a day reading through RSS feeds. In fact, I found out about this really cool new script from Hal Rottenberg through my RSS reader, courtesy of Alan Renouf, even though Hal emailed me to tell me about it (I get so much mail from Hal I usually just ignore it.)

The beauty of RSS (in case you've been living under a technological rock for the past few years) is that everything comes to you, rather than the other way around. How many times a day do you really want to log into your VI to figure out what's going on anyway? In VI you can get email notifications, but this is only for alarms, in addition to being a bad idea in general. If you look through Hal's feed you can see that this tells you about everything, including things like an ominous warning from VMware Update Manager that it only has about 500 megabytes of space left. Just add it to your RSS aggregator of choice and suddenly you know everything that's going on with your VI with minimal effort.

Hal hasn't made his script public, it seems he's using it as a teaser for his upcoming book. Let's hope he hurries up, so drop him a note and tell him to stop goofing off all the time.

by Carter Shanklin at November 12, 2008 05:19 PM

YouTube Star: VMmark Cluster Demonstrates DPM

VROOM!

We recently posted the results of some experiments running VMmark across a 4-server cluster using DRS (here and here) that demonstrate the power and flexibility of VMware Infrastructure. We have used the same methodology and the same hardware to measure the performance impact of DPM (there wasn't any) as well as the power savings (it was substantial). One of our marketing guys put together a pretty neat video. If you haven't seen it yet, check it out. And yes, I too wish my 8-hour workday only lasted 2.5 minutes.

by Bruce Herndon at November 12, 2008 01:06 AM

November 11, 2008

Sun Shows Value of Large Pages in VMmark

VROOM!

I am fascinated studying the ripple effects seen in overall system performance caused by tuning a subset of workloads in a virtualized environment. Our partners at Sun have provided a textbook case by publishing two VMmark 1.1 results on the Sun Fire X4240 last month. The scores were 7.92 @ 6 tiles and 8.07 @ 6 tiles, roughly a 2% difference. The higher result was run using large pages for the javaserver workload while the lower result did not have large pages enabled. (Look here for instructions on how to allow large page usage on Windows 2003.) Using large pages allows the six VMmark javaserver workloads in the benchmark test to consume significantly fewer CPU resources while achieving their desired performance. This CPU savings frees additional resources to be shared by the other thirty workloads, resulting in a higher overall score. Thanks to our partners at Sun for sharing the data.

by Bruce Herndon at November 11, 2008 11:57 PM

SRM test results: 8 mins. "that's all?" (worked too well)

VMTN Blog

via the new blog, VMGuy, from VMware SE Dave.

Link: VMware Communities: Manual Automation: Site Recovery Manager is a Hit!.

I have more testing to do but can report that I'm starting 4 VMs from a single replicated LUN in 8 minutes. And I'm not talking about from the time of just powering on, I'm talking about pressing the "big red (test) button" - powering-up the VMs - starting the Windows services - and the recovery plan completion. Try that using physical servers! Sorry, but even restoring servers from a B2D solution that's replicated to your DR site won't be as fast.

I demonstrated SRM for the DR team and initially got a "that's all?" kind of reaction. I quickly realized that SRM, with the combination of array-based replication, +worked too well+! Meaning, it did such a good job of hiding the complexity and number of steps required to get from A to Z that my non-technical DR teammates didn't understand what SRM was really bringing to the table. If there's only one thing you take away from this article, make sure it's that you're better off explaining in simple terms the steps SRM is executing in the background before running a demonstration.

Talking about the virtues of SRM is one thing (the recovery run book, the steps it automates, the testing capabilities (which are awesome by-the-way), etc.), demonstrating these product features for your DR team is another. If your experience is like mine, you'll find it dramatically influences the discussions on

by John Troyer at November 11, 2008 08:04 AM

Talking storage with Chad Sakac - Communities Roundtable Podcast #24

VMTN Blog

We had a great time with EMC's Chad Sakac last week. As usual, listen via the widget on the right or download the mp3. (1:08) More info on the podcast series.

I've delayed putting this up because I was trying to get the links together first, but I've been swamped. If you have any other links to contribute, feel free to add them in the comments, although Eric is usually the last word in resource links.

This Wednesday our scheduled topic is vCenter AppSpeed, but I'm still waiting on a final confirmation. For more information on AppSpeed (nee B-hive), see the old B-hive site and this AppSpeed demo video from VMworld 2008.

by John Troyer at November 11, 2008 06:58 AM

VMware Fusion 2 University: Import a Parallels or Virtual PC Virtual Machine

Team Fusion

Continuing in our theme of the different ways to move to VMware Fusion, today’s video revolves around importing a Parallels-based virtual machine or Virtual PC for Mac-based virtual machine to run on VMware Fusion 2.

Lots of people enjoy the stability, power, and user-friendliness of VMware Fusion, and as such, are switching from Parallels Desktop for Mac to instead use VMware Fusion 2 to run Windows on Mac.

And people who have been using Virtual PC for Mac to run Windows in emulation (NOT virtualization, like VMware Fusion) on their Power PC-based Macs, but who are now moving to Intel Macs, will certainly be looking for a new way to run Windows on Mac.

In fact, recently, people like Walt Mossberg of the Wall Street Journal, and Dave Girard of Ars Technica have been noting that VMware Fusion is the better way to run Windows on the Mac.

Switch to Fusion with Unparalleled Ease

In order to make this really easy for our users to switch and not have to rebuild their VMs, and the work that went into them, we’ve included a feature in VMware Fusion 2 that allows you to directly import Parallels and Virtual PC for Mac (for those people moving from Power PC-based Macs up to Intel-based Macs) to run in VMware Fusion.

Like most things with VMware Fusion, it’s easy, straight-forward, and “just works.”  You can check out the video below to see how easy it is.

And as a quick ad, this video is taken from the more than dozen VMware Fusion 2 video tutorials made freely available to help you get the most out of VMware Fusion 2.

by Pete Kazanjy at November 11, 2008 01:29 AM

November 10, 2008

Unisys Publishes VMmark Result

VROOM!

Our partners at Unisys recently published their debut VMmark result of 21.96 @ 15 tiles using an ES7000 Model 7405R G1. This is a 32-core, 8-socket system. You can find the details at the ever-growing VMmark results page.

by Bruce Herndon at November 10, 2008 10:34 PM

VMware Fusion 201: Snapshots

Team Fusion

I previously gave a tip about how to make effective use of snapshots, but what about how they actually work? As I mentioned, one of the key things to understand about snapshots is that they only store the differences between the current state and the original state. Technically-minded people will recognize this as copy-on-write.

Base Let's suppose you have a sparse virtual disk as shown. You then take a snapshot and do a little bit of work - modify the file at the far right and shorten the one before it. Once you take a snapshot, the original base disk is no longer written to, but is still read from. Most of the virtual disk is still pointing at the base file, but what you did change now refers to the snapshot. Snapshot_1 By itself, snapshot 1 is not enough to represent the virtual disk, nor is the base disk. Snapshot 1 might not even contain complete files, but only parts of files that have changed.

If you take another snapshot and make more changes, a similar process happens - now neither snapshot 1 nor the base file are written two, but are still referenced. New changes go to snapshot 2.Snapshot_2

Hopefully you can see why each snapshot can take up as much space as is allocated to the virtual disk - you might overwrite every single block, and Fusion needs to keep both the original (in case you want to revert to the snapshot) and the new data.

With a preallocated virtual disk, it's nearly the same story. Only the base disk changes to a 1-to-1 mapping, but each snapshot is still sparse.

by Eric Tung at November 10, 2008 10:19 PM

November 08, 2008

More on VMware Update Manager

VMTN Blog

A few days ago, we linked to a new white paper on VMware Update Manager performance and best practices. Rich Brambley at VM /ETC had a few comments (see VMware Update Manager planning makes a difference), and he also ran an informal poll about how people are using VUM. Check it out (and feel free to still go vote yourself).

Picture_2

Rich is a little uneasy with keeping VUM on the same machine as VC, since it has to store potentially years of patches going forward, but it looks like that's the easiest way and the way most people are doing it, probably because they aren't using for all those Windows patches. Our recommendations to separate it only kick in at larger deployment sizes.

Also from Rich:

Finally, Carlo over at VMware Info has written a great how to post for patching ESX with VUM. The VUM Administration Guide seems to be a little difficult to follow to me, and Carlo’s post is straight forward about how to configure VUM for updating ESX hosts.

by VMTN at November 08, 2008 02:43 AM

Installing and Configuring Linux Guest Operating Systems

VMTN Blog

Link: Installing and Configuring Linux Guest Operating Systems.

This technical note describes installing, configuring, updating, and administering Linux guest operating systems in virtual machines running on VMware Infrastructure 3 version 3.5. In addition, this note includes a collection of useful tips and tricks in fine-tuning your Linux virtual machines. Although the recommendations in this paper apply to most Linux distributions, they are tailored specifically to Red Hat Enterprise Linux 5. Linux administrators can use this paper as a source for guidelines when building and maintaining Linux virtual machines in their VMware Infrastructure environments. Some working knowledge of VirtualCenter 2.5 Update 2, ESX 3.5 Update 2, and Linux operating systems is required.

Missed this last week when it came out. I need to get a weekly or monthly round-up of white papers -- if you haven't dropped by in a while, plenty of good stuff here at Technical Resources.

by VMTN at November 08, 2008 01:32 AM

A day in the life of DPM - 55% power savings

VMTN Blog

Nice video of a day in the life of some VI servers using DRS with DPM (distributed power management) enabled. As the workforce comes into the office, utilization increases, ESX servers come out of standby mode, VMs get VMotioned, and everybody's happy. The process reverses itself after 5pm. (Who leaves work at 5pm?) And the servers happily sleep overnight or until you need them again. And the sys admins? Feet up, watching YouTube, never touching a power switch or a mouse. It's all automatic.

From instigator Scott Drummonds: VMware Communities: Virtual Performance: DPM Power/Performance Video.

We started the test with 13 tiles worth of VMs (108 VMs in all) on the DRS cluster. With all of these VMs idle, DPM consolidated them to a single host and turned off three servers. As the load was applied to the VMs at 9:00 AM and driven through an eight-hour workday, DRS and DPM powered on servers and balanced load, as needed. When the day ended at 5:00 PM, the load was again consolidated and servers were powered down. The video we shot includes power meters of the systems under test and screenshots of activity induced by DRS and DPM.

by John Troyer at November 08, 2008 01:22 AM

VMware Fusion 2 University: Create a Virtual Machine from a PC with VMware Converter

Team Fusion

Apple likes to talk about how 50% of all Mac purchasers are switching over to the Mac from the PC. 

Just recently, Apple’s COO, Tim Cook, Apple specifically called out VMware Fusion as one of the driving factors helping people to switch to the Mac, by making it easy to run the Windows apps you’ve come to love, or which don’t have Mac versions, on your Mac, virtually.

Bring your PC with you as you switch

One of the things that helps people do this, is the ability to move an existing PC, a physical Windows box, like a Dell or HP or what have you, to a virtual machine, to run on VMware Fusion.

Yes, it does sound like black magic, but really, it’s quite easy.  In fact, we provide a free tool, VMware Converter, which runs on pretty much any Windows OS, that will make a bit-by-bit virtual machine copy of your existing PC to run on any VMware virtual machine runtime (Fusion, of course, being this team’s favorite).

To help you get a better idea, here are two videos that show exactly how to switch to the Mac with VMware Fusion by bringing along your existing Windows PC.

These are both taken from the more than dozen VMware Fusion 2 video tutorials made freely available to help you get the most out of VMware Fusion 2.

VMware eLearning step-by-step video:

VMware Fusion team’s slightly sexier, though less exhaustive video:


Migrate Your Windows PC to your Mac with VMware Fusion from VMware Fusion on Vimeo.

by Pete Kazanjy at November 08, 2008 12:26 AM

November 07, 2008

SAP UK & Ireland User Conference

Virtualization for SAP Solutions

Taking place at the Novotel London West, Monday 10th and Tuesday 11th November, the SAP UKI User Group’s annual conference and exhibition is the UK & Ireland’s premier SAP related event bringing together SAP professionals and business managers from across the UK, Ireland and Europe and is an event not to be missed! For its first time, VMware will also be present at this event. Do not miss to meet with us at the booth and please join us for our presentation on Tue, Nov. 11. Illustrated with customer references including Astra Zeneca and T-Systems, this presentation will show how running SAP on a virtualized platform can enhance availability, reduce operational costs and complexity, accelerate deployment and upgrade processes whilst mitigating risk and compliance issues.

Presentation: Deploying SAP applications in a virtualized environment

Date: Tuesday, 11. November 2008
Start Time: 14:05
End Time: 14:50

by m@t at November 07, 2008 08:57 AM

Webcast: "Virtualize Your SAP Environment with NetApp and VMware" - Recorded Version Available on 11/14

Virtualization for SAP Solutions

Today, NetApp hosted a webinar titled "Virtualize Your SAP Environment with NetApp and VMware.” It was a great discussion featuring Roland Wartenberg of SAP elaborating on SAP's virtualization strategy, Rick Scherer with the City of San Diego talking about their virtualized SAP environment, and Manfred Buchmann (NetApp) discussing the connection between NetApp storage solutions, VMware virtual machines, and SAP. I contributed a number of customer use cases and customer results. Of course, we als talked about our joint DR Solution (Efficient Disaster Recovery for SAP Landscapes).

You will be able to see the recording starting end of next week.

-Joachim

by jorad at November 07, 2008 06:00 AM

November 06, 2008

VI admins sleep easier: HA in action

VMTN Blog

From Jason Boche yesterday morning on Twitter. Check out his new blog, now on Planet V12n.

Picture_1

"Lost power this morning to an ESX blade @ 9:44:15. VMware HA powers on downed VMs @ 9:45:17 after migrating them to a different host." -from Twitter

by John Troyer at November 06, 2008 07:58 PM

Green IT: how much are you saving?

VMTN Blog

Shannon Snowden went back and did a check on their power/hardware savings numbers from the virtualization work they are doing at New Age Technologies. "Green IT" as an overhyped topic of the day may come and go (I actually don't think it won't go too far away this decade), and you may even have plenty of room left in your data center (if so, congrats on your forward thinking and large capital budget), but the fact remains that the power savings are real, and that's dollars left in your bank account.

Link: Green IT and Virtualization Real Numbers | Virtualization Information.

So, I decided to run some numbers on one of our largest server virtualization projects this year and the results really are a great reminder that what we are doing is important.

We have one client that we have virtualized about 1,000 servers this year alone. Using VMware’s Green Calculator, check out the results.

  • Energy Savings: We saved over 6.6 million kWh of energy and cooling costs for the servers
  • Server Hardware: We saved over $5.2 million in hardware costs
  • Energy Costs: We saved over $660,000 in power costs

Update: if you're interested in a greener data center, also check out this webcast: Lean and Green: A Simpler More Cost-Effective Datacenter on November 13.



by VMTN at November 06, 2008 07:44 PM

More Than Blue Sky Thinking

The Console

Reza Posted by Réza Malekzadeh
Sr. Director, Product Marketing & Alliances

Looming on the horizon are the nimbus, cirrus, stratus and cumulus that threaten to deliver us cloud computing imminently.  Promising an end to most of the challenges and frustrations of IT systems as we know them, the concept of cloud computing is thundering through the business community to become one of the most talked about and revered subjects of the day.

Behind the hype seems to be a reality that, for once, the IT industry maybe onto something truly game changing that will not only radically cut costs, but also deliver a far better experience to the business or consumer user. 

The expectations are huge. banking analysts say that cloud computing will be a $160 billion market within the next five years, and every major IT company from Microsoft to Google, from IBM to Dell, is desperate to be the rainmaker.

The question that comes to mind though is not “what” cloud computing is, but rather “why”. If it is such a great idea then why has it taken until now for the gurus of technology to deliver it. 

The “what” question is just too easy; imagine a world where you could walk up to any computer, anywhere in the world and instantly access all your data and applications just as you left them last time you logged on – and somewhere, up in the clouds, a huge IT infrastructure was whirring and churning to deliver the IT services to you.  Basically, think of the ease of getting electricity from a socket in your home that somehow connects to a generating station and you start to get the idea.

Why has it taken so long? Go back far enough in time and IT professionals always thought that computing would be delivered from the cloud and that the personal computer was nothing more than an aberration.  Early mainframes where constructed to deliver IT services down wires to dumb terminals that could do no more than display text on a screen and take back digits typed into a keyboard.    

These mainframes could handle hundreds or even thousands of users and if they had carried on evolving then, we would probably have had cloud computing in 1988 - rather than 30 years later.   

In fact, Thomas J. Watson, founder of IBM, is supposed to have remarked that “there is a world market for about five computers”.  He didn’t mean that these new fangled devices would never catch on (as Lloyd George unfortunately said about TV) but that his vision was of a few massive number crunching mainframes in the sky that could deliver their computational power to the users remotely.

What was not understood though, was the challenges that cloud computing would have to overcome.  And this is where the answer to the “why now” question lies.

To deliver cloud computing requires five critical components: the scalability of the infrastructure to meet users’ needs; the resilience to accommodate the unexpected; the network to distribute the applications; and the ability to deliver an acceptable experience to the user at a reasonable cost.

When it came to scalability the reality was that you built or rebuilt your datacenters once every five years to fit an estimated workload or users and traffic.  The concept of “dynamic” or “on demand” capacity existed only as a concept.  But something fundamental changed at the start of the 21st Century, when server virtualisation suddenly arrived on the scene, as a result of innovations led by VMware.

Where previously you had attached a given application to a server only to see users slow to a deathly halt during periods of peak usage, now you could now decide to vary the server capacity or resources available to a virtualised application and so scale it up or down according to demand.  This was freedom for the CIO and MIS staff as they suddenly could adapt their business to the needs of the user community.  It wasn’t cloud computing yet, but maybe the forerunner.

Resilience was probably the biggest killer of the original IT model and gave rise to the PC almost by itself.  Despite cloud computing being the ideal solution for IT architecture, the repeated and sustained or catastrophic breakdowns of mainframes led users to revolt against the tyranny of the IT director.  The phrase that sends shudders though the souls of many middle-aged ex-programmers is “unscheduled outage” as hours of work would be lost to some minor bug on a given server.  Evolution eventually kicked in with the concept of transferable workloads made possible by innovations such as VMware’s VMotion – a technology which can take a running application from a problematic server to another server with no interruption. 

Bizarrely the network was probably the least of the problems.  Arpanet, the forerunner of the Internet, was up and running in the 80s and although designated for military use quickly proved itself within the academic community.  But at an original 50 Kbps, compared to today’s multi-Megabit throughputs, there is no doubt that broadband has transformed the landscape for cloud computing.

Probably the most emotive issue in IT is the end-user experience. Grown men have cried at the prospect of rebooting Windows Vista and previous experiences of cloud computing were little different. We expect and have a right to an IT experience that delivers the goods.  An ATM machine, a great example of existing cloud computing, should not take three minutes working out whether it will or won’t pour out cash.  But so many factors affect that experience that IT directors have previously been powerless to control the experience.  The era of virtualisation has radically transformed that equation as the IT professional can now isolate, prioritise and manage applications to deliver a fantastic experience to users. 

Finally is the age-old issue of cost.  Every new era of IT has promised much, but at extra cost.  PC networks, client-server computing, server-based computing – all of them demanded an extravagant outflow for the promises of a return tomorrow.   Cloud computing is the very, very first that actually costs less.  By harnessing the scalability and resilience provided through virtualisation, and by using the global networks that now exist, it delivers the massively improved user experience at a lower cost. 

And if you need proof, look at any of the combatants in providing Cloud Computing – Amazon, Microsoft, Google, Oracle – and ask them if they use virtualisation at the core of their infrastructure.  They all do. If the drip, drip, drip of effect of cloud computing works for some of the most popular IT services of today, you can be sure it will seep into mainstream IT soon.

by VMTN at November 06, 2008 06:20 PM

SAP DSAG & TechEd EMEA 2008 Review

Virtualization for SAP Solutions

During the past weeks I attended two major conferences for SAP users - German SAP User Conference (DSAG), Leipzig and SAP TechEd EMEA 2008, Berlin. I'd like to share my impressions of these events with you.

At DSAG, I gave a presentation about VMware virtualization of SAP. The room was packed and some of you who visited my presentation had to stand at the back of the room. Despite the 115+ attendees, it was a great, interactive presentation, with discussions around Live Migration of SAP using Vmotion and DRS, Disaster Recovery Management using our latest member of our product family VMware Site Recovery Manager, and last but not least our reference customers. Some of the visitors hardly believed that it is possible to move a live SAP Systems while 100s of users are putting the system under stress from one server to another without any downtime, without loosing a single user, nor a user context. About 25% of my audience were already running SAP on VMware, 15% run SAP production on VMware.

At SAP TechEd EMEA 2008 in Berlin, VMware Virtualization was once again a topic presented by many companies and discussed in many presentations (see my previous blog). The sessions that I attended were again packed and the VMware presentation as part of Roland Wartenberg's session LCM300: Enterprise Virtualization Map was visited by 250+ people. IBM claimed that x86 virtualization was the key topic on their booth where they showcased a 96-core server - perfectly suited for VMware. The VMware live-demo on HP's booth was another highlight and received a lot of positive feedback from visitors. I spoke to SAP customers who told me that the integration of Virtual Center into SAP Adaptive Commuting is a step into the right direction.We are very happy to hear this.

Overall, both event were great, and I am sure VMware will be back next year.

Matthias

by m@t at November 06, 2008 03:48 PM

November 05, 2008

NFS.Lock.Disable = 0

VMTN Blog

There's been a slow discussion in the VMware blogosphere about this, and if you haven't been following along:  if you use NetApp NFS storage (or NFS in general), please review your settings, makes sure NFS.Lock.Disable = 0 (the default), you've applied the appropriate VI patches, and check out the best practices documents and kb articles linked in these blog posts.

by John Troyer at November 05, 2008 06:13 PM

VMware's Dan Chu on Windows Azure and vCloud

VMTN Blog

It's an interesting conversation people are having in cloud-land at the moment. Microsoft Azure competes more directly with Google AppEngine, and somehow Amazon always comes into the discussion, but VMware, since we aren't a service provider, isn't on many people's radar in this conversation yet. (Peter Laird and Tim O'Reily give pretty lucid cloud taxonomies.) Here VMware's Dan Chu compares Microsoft's approach to VMware's - very worth a read. VMware: Windows Azure More Smoke than Cloud

"With vCloud, we don't become a service provider," says Chu. "Microsoft is stepping over the line, and now intends to compete directly against some of their [hosting and service provider] partners." By comparison, Chu argues that vCloud is a platform that is supported by a broad range of third-party service providers, including British Telecom, Saavis, Rackspace, Terremark, and others.

The second failing of Windows Azure Chu sees is the lack of support for applications and platforms that aren't based on the .NET framework. "[With vCloud] we're looking to support a broad range of existing applications...without forcing customers to rewrite applications, or to only have certain kinds of apps, "says Chu. "VMware's products are already providing a platform that people are using to deploy internal clouds, and that our partners are already using to create external clouds."

by John Troyer at November 05, 2008 10:50 AM

Workforce VMware founded by German SAP User Group (DSAG)

Virtualization for SAP Solutions

Due to the great demand of VMware Virtualization in the SAP community, The German SAP User Group (DSAG) founded the "Workforce VMware" to further develop solutions for customers regarding virtualization and gather customer feedback. For the first meeting we expected 20 customers, but more than 280 signed up. We are currently working on the logistics of this meeting in Walldorf on December 11. You can find more information here.

Matthias

by m@t at November 05, 2008 09:04 AM

Join us Wednesday - EMC's Chad Sakac at the VMware Communities Roundtable

VMTN Blog

Join us on the podcast. Wednesdays noon PST / 3pm EST / 8pm GMT. Connect info. This week with EMC's Chad Sakac. It should be free-ranging and fun. Some possible topics:

  • What VMware, EMC and Cisco are doing together around the Next Generation Datacenter
  • What's coming in vStorage
  • Reference Architectures for Tier 1 applications like Exchange, SQL Server, Sharepoint
  • What we're seeing around Disaster Recovery for VMware

by John Troyer at November 05, 2008 07:58 AM

So how important is LiveMigration/VMotion now?

VMTN Blog

We say this all the time, but don't listen to us, listen to other people using VMware. We will eventually look back on planned downtime (or emergency downtime for patching) like something quaint and obsolete. (What's a good example of something an admin would have to do 30 years ago that we laugh at now? Wait for your overnight batch job to come back? Load the line printer with green bar fan-fold paper? Swap giant disk platters? I'm sure you can come up with better ones. Anyway, we'll think of it like that.)

Link: It’s Just Another Layer » So how important is LiveMigration/VMotion now?.

One of Microsoft’s big marketing statements I’ve heard several times is that LiveMigration wasn’t that important since clients don’t change when they do work on hardware even with LiveMigration.   I’ll cover why this in depth on why this is a flawed thought for an enterprise company in a future blog entry.

Along comes a critical use case this past week.  MS08-67 came out and threw most companies I know of into some serious chaos while they rolled this patch out ASAP.  Now this one does impact any Windows OS including Server Core.   Anyone that would be using Hyper-V would obviously be affected right now.    Let’s walk through trying to deploy this for 120 Hyper-V hosts with Quick Migration (which causes a service interruption) as fast as humanly possible with business buy-off to do this ASAP outside of Maintenance Zones.

by John Troyer at November 05, 2008 07:36 AM

Bonus Tip: Snapshots

VMTN Blog

Snapshots are not particular tricky, but they are often misunderstood, on both the hosted and the VI side. (I just had to clean up a huge Fusion snapshot that was really difficult -- I tried to commit my snapshot (merge it back into the base image) by deleting it, but I didn't have enough space left to make the new clean file. Oh well, I didn't need those iMovie files anymore.)

Link: VMware: Team Fusion: Bonus Tip: Snapshots.

People sometimes get confused about how snapshots work and how to use them. While snapshots are incredibly useful for many things, one major misconception is thinking that they are a form of backup - they're not! If a lightning strike totally fries your computer, a snapshot won't help if it's on the same disk (because your snapshot just got fried too). Sure, you'll probably get lucky - if your computer merely shut down uncleanly, your snapshot may still work. You might not even need to go use the snapshot. But this is not a backup, it's gambling.

by John Troyer at November 05, 2008 07:17 AM

Update / Correction - Technical Note: Performance Counters

Developer Center Blog

Folks - we had an update/correction on our Peformance Counters - you can download the latest doc here, it will take us a few days to upload to our doc server.
On page 6: Table 3: Performance Counters - Under column Name - consumed

Latest Version:
Document Revision 2008-Nov-03 (as indicated on the very last page)
File Name: technote_PerformanceCounters-11-03-08.pdf

____________________________________________________________

Folks,

SDK Developer Support Team has put together a pretty good Technical Note describing details on our Performance Counters. The document will live on our Tech Notes Site

CORRECT URL:

http://www.vmware.com/resources/techresources/1067 and be incorporated into our next SDK release.

Hope this is helpful - send us your feedback

Regards,

Pablo

by heyitspablo at November 05, 2008 01:34 AM

November 04, 2008

Make Windows Unity windows look like Mac OS X Windows: WindowsBlinds with VMware Fusion

Team Fusion

Chris White pinged us on Twitter the other day saying that he was using WindowsBlinds to skin his VMware Fusion Unity windows (Unity demo video here) in Windows look like Mac OS X windows.

We were intrigued, and asked him to take some screenshots to share with everyone.

Chris was nice enough to do so.

Here’s a shot of Internet Explorer with a Mac OS X WindowsBlinds skin on it.  The visual style is “Leo.”  Hmmmm…wonder what that stands for….?

Note how the “close” “minimize” and “maximize” buttons in the upper right of the window look like Mac OS X buttons:

20081103-qrq21jrp6hbcci3dfmim3r5629

And in a too-meta-moment, here’s a screenshot of the WindowsBlinds UI, which has itself been skinned!

20081103-tq7p32fg7akypeq2s2itb7736r

by Pete Kazanjy at November 04, 2008 09:24 PM

November 03, 2008

Paul Maritz: The Future of Cloud Computing | Newsweek

VMTN Blog

Link: Paul Maritz: The Future of Cloud Computing | Newsweek Technology | Newsweek.com.

NEWSWEEEK: What is VMware ' s vision of cloud computing?
Paul Maritz:
You can divide the cloud today into two categories. One is the enterprise cloud, and there is one, for want of a better phrase, that I call the new-age cloud. The enterprise cloud is really about providing the opportunity for existing IT customers to take their existing workloads and have somebody else supply the underlying infrastructure … The other type of cloud is what I call the new-age cloud. This is about supporting fundamentally new applications. It's not about the current applications that are being used in the IT space. Ultimately the two will come together.

What are the biggest reasons for cloud computing to happen?
Businesses are going to want the flexibility to outsource the provisioning of infrastructure to people who can be presumably more efficient at it than they can be. The motivation is going to come really from having other people provide the "plumbing"—power, the day-to-day management, the reliability, uptime and so forth. Businesses will want to have the option of moving their application loads into, and equally importantly back out of, this outsourced infrastructure as they see fit.

by John Troyer at November 03, 2008 09:15 PM

VMware Fusion 201: Preallocated Virtual Disks

Team Fusion

Last time I covered sparse virtual disks. This time, let's look at the other option: preallocated virtual disks.

Preallocatedvmdk If you recall, the main advantage of sparse disks is that space is not grabbed upfront, but rather as needed. A preallocated disk, on the other hand, is (as you might expect) preallocated. You tell Fusion that the virtual disk should be 10 GB, and Fusion goes off and grabs 10 GB of disk space. Performance may be slightly better with a preallocated disk.

There are fewer problems with fragmentation on a preallocated virtual disk. As you might recall, there are three layers where a sparse virtual disk can get fragmented: the guest filesystem, the .vmdk file, and the host filesystem. A preallocated disk avoids fragmentation at the .vmdk file level, and fragmentation at the host OS filesystem level will not grow worse over time (since Fusion already grabbed all the disk space, there's no need to get more). For best results, you can defragment the host filesystem before creating a preallocated virtual disk to make sure it's as contiguous as possible.

Having a preallocated disk doesn't mean that your virtual machine will always be the same size, however. The most obvious example is that taking a snapshot or using AutoProtect will increase the needed space, and snapshots tend to grow over time.

Personally, I stick with sparse virtual disks. I like the flexibility of having extra space, which lets me keep more virtual machines at the same time than if I had to commit all that space right away. The only downside is that I have to be a little more careful about not running out of space, but I keep enough free that it's never a problem.

by Eric Tung at November 03, 2008 08:20 PM

November 01, 2008

Ever wonder how big your snapshots are?

VI Powershell Blog

I often call snapshots "the silent datastore killer". When you create a snapshot, the system records the difference between the current state and the state when the snapshot was made in something called a delta file. The delta file can grow to be as big as the base disk itself if you write a lot of data to it. If you create a snapshot of that snapshot, the process begins again, and that snapshot can also grow to be as big as the base disk.

I've personally filled up many a drive with snapshots that I've forgotten about. When your datastores fill up, any VM trying to expand files on that datastore (for example if it has snapshots it is trying to grow) will freeze until some space becomes available. It's a real disaster and I've even heard of people going so far as to disable snapshots entirely.

The trouble is that VI Client doesn't give you an easy way to figure out how big snapshots are. Even if it did, do you really want to sift through dozens or hundreds of VMs on a regular basis looking for big snapshots manually? We need automation to solve this problem.

A new cmdlet in the VI Toolkit Extensions can help. Get-TkeSnapshotExtended adds a property called SizeMB to snapshot objects. To use it, load the VI Toolkit Extensions (in PowerShell v2 CTP2 or higher) and run

Get-VM | Get-TkeSnapshotExtended | Select Name, VM, SizeMB

Here's some sample output:

Shot2

Hope that helps!

by Carter Shanklin at November 01, 2008 09:28 PM

Bonus Tip: Snapshots

Team Fusion

People sometimes get confused about how snapshots work and how to use them. While snapshots are incredibly useful for many things, one major misconception is thinking that they are a form of backup - they're not! If a lightning strike totally fries your computer, a snapshot won't help if it's on the same disk (because your snapshot just got fried too). Sure, you'll probably get lucky - if your computer merely shut down uncleanly, your snapshot may still work. You might not even need to go use the snapshot. But this is not a backup, it's gambling.

If you want to back up a normal virtual machine, shut down (or suspend) the virtual machine and quit Fusion -- you never want to try to read or modify virtual machines when Fusion is working on them. From the Finder, copy the virtual machine to a suitable external drive. Done! If you're feeling really backup-ful, keep the external drive offsite - this way you're protected against disasters that affect your entire location (e.g. fire, flood, etc.) A snapshot is better than nothing, but it's not true backup.

Another common misconception about snapshots is how exactly snapshots are stored (as a corollary, unless you know what you're doing and understand how snapshots are stored, you don't want to manually fiddle with snapshots outside of Fusion). When you take a snapshot, Fusion doesn't create an entirely new copy of your virtual machine; it records the differences since you took the snapshot. This space savings can be quite large: Say you've got a 40 GB virtual disk. When you take a snapshot, you probably aren't expecting to instantly lose another 40 GB of space, which is what an independent copy would require. It would also take quite a bit of time merely to copy the data! If you do want an independent snapshot, make a backup of the virtual machine as described before.

Instead, after taking the snapshot, Fusion writes changes to a different set of files (technical users will recognize these as delta files). However, this also means that you can't delete the original files and still have a working snapshot - the snapshot is dependent on the originals. If you ever want to revert to the snapshot, Fusion simply gets rid of the delta files. If you ever want to discard the snapshot (but keep the changes), Fusion needs to write the changes back to the original file (Note: you may potentially need as much free space as the original disk).

In the long term, each snapshot can grow up to the size of the original disk, but it's not an upfront cost. Remember that snapshots can cause a virtual machine to be larger than the size of the virtual disk.

So if snapshots aren't really for backup, aren't independent, and can take up a lot of space over time, what are snapshots good for? One answer is quick testing. Say you've got a system update but are worried that it might cause a conflict or other problem. You can take a snapshot before installing it; if it does cause problems, you can roll back as if it never happened. This also applies to malware - say a virus infects the guest. If you have a snapshot from before it happened, you can warp back to before it was a problem. As a word of warning, reverting to a snapshot undoes all changes to the virtual disk, including new and modified data you might actually care about.

Reverting to a previous state is something a backup could also solve, but taking a snapshot is quicker (among other things, no need to exit out of Fusion) and smaller (unless you've got a fancy block-based differential backup system, in which case it's the same).

Snapshots are only useful if you have them, though - a snapshot you have is way more useful than one you don't. To solve the "Darn, I wish I remembered to take a snapshot yesterday!" problem, Fusion 2.0 has a feature called AutoProtect, which lets you set up automatic snapshots. You can choose how many you want to keep and how often they're taken. Note: The time period is based on elapsed guest time, not real time.

by Eric Tung at November 01, 2008 09:18 PM

VMware Server - Roundtable Podcast #23

VMTN Blog

VMware Server was our topic this week, with product manager Azmir Mohamed as our guest. One of the most fun parts of these podcasts is that they are decidedly not our standard webinars/webcasts. I come up with the guests, but the agenda is set by both our Roundtable Panel and now increasingly by the live listeners who show up every week to listen, chat, and call in. As always, listen via the widget on the right or the mp3 (56:01 duration). More info on the podcasts. We are on iTunes.

If you want more of an introduction to VMware Server, please register for this VMware Server webcast. And although we did cover the topic, you can also check out this slightly cheesy but informative VMware Server vs ESXi podcast with Azmir and Amir.

Check out the VMware Server FAQ page, but the PDF version of the VMware Server FAQ is a bit longer and more complete.

This week we succeeded in generating more heat than light a few times, but here are a few things I learned this week about VMware Server: You can manage Server v1.x with VirtualCenter, but we don't yet have that capability to do that in version 2.x. The reason is that, frankly, not many people were using that feature (you have to buy a VC Agent license to do it, so we know exactly how many people are taking advantage of it), so even though we demoed an early version of the feature for 2.0, we felt like there were higher priority features we should be working on. Here are some of the new features in 2.0:

  • New expanded operating system support
  • 64-bit operating system support
  • VMware Infrastructure (VI) Web Access management interface
  • Independent virtual machine console
  • More scalable virtual machines
  • Volume Shadow Copy Service (VSS)
  • Support for Virtual Machine Interface (VMI)
  • Virtual Machine Communication Interface (VMCI)
  • Support for VIX API 1.6

So, if you need to manage Server via VC, please continue to use Server 1.x, which is far from a first gen product with its roots in GSX Server. If you feel strongly about this or any other topic, make yourself heard over at the VMware Server Community.

Another thing that I learned is that we're running as native 64-bit on Linux.

Best tip from the show: keep a backup copy of your VC Management Server in a VM on VMware Server on a spare machine somewhere in case of emergency.

Join us next Wednesday @ noon Pacific Standard Time with EMC's Chad Sakac. (This week all our European friends were missing because they switched from Daylight Saving last week and showed up an hour late! We here in the US do it this Sunday, so we're back in sync.)

by John Troyer at November 01, 2008 08:46 PM

VMware Update Manager Performance and Best Practices Paper Posted

VMTN Blog

Link: VMware: VROOM!: VMware Update Manager Performance and Best Practices Paper Posted.

VMware Update Manager (VUM) is a component of VMware Infrastructure that automates patches and upgrades of ESX hosts as well as Windows and Linux virtual machines. A new white paper, VMware Update Manager Performance and Best Practices http://www.vmware.com/pdf/vum_1.0_performance.pdf, is now available.

In this paper we discuss VUM 1.0 host deployment, latency, resource consumption, guest OS tuning, high-latency networks, and the impact of on-access virus scanning. We also provide performance tips to help customers tune the system for better performance.

by John Troyer at November 01, 2008 02:19 AM

VMware Update Manager Performance and Best Practices Paper Posted

VROOM!

VMware Update Manager (VUM) is a component of VMware Infrastructure that automates patches and upgrades of ESX hosts as well as Windows and Linux virtual machines. A new white paper, VMware Update Manager Performance and Best Practices (http://www.vmware.com/pdf/vum_1.0_performance.pdf), is now available.

In this paper we discuss VUM 1.0 host deployment, latency, resource consumption, guest OS tuning, high-latency networks, and the impact of on-access virus scanning. We also provide performance tips to help customers tune the system for better performance.

by John Liang at November 01, 2008 01:04 AM

October 30, 2008

What's New in Security at VMware.com

VMTN Blog

From the VMware Security Blog, which should be on your short list. (Note that the blog is more for news and updates, but you can get security notifications emailed to you -- check the right sidebar of the blog or the Security Center. Note also that this page is separate from the Security Technology page Charu mentions below.)

Link: VMware: VMware Security Blog: What's New in Security at VMware.com.

  • The new VMware Compliance Center includes an overview of the issues involved with virtualization and compliance, a comprehensive listing of partner virtualization compliance solutions, and references such as white papers and recorded webcasts.
  • There is a new listing of Free Security and Compliance Utilities.
    These tools are provided by VMware partners, and can be downloaded and
    used right away to help assess and monitor your VI deployment
  • The Overview section of the Security Technology site has been updated to present the core issues of virtualization and security in a more streamlined way.  The Resources listing has also been enhanced to include more external resources.
  • Although not new, the VMsafe section had received some updates over the summer which you might not have seen.
  • Finally, something else that's not new but worth pointing out is the Security Certifications
    page.  We will be listing all security-related certifications that
    VMware products receive, so you can check here to see ones we have
    received.

by VMTN at October 30, 2008 10:46 PM

What's New in Security at VMware.com

VMware Security Blog

We've added some new things pertaining to security and compliance at the vmware.com web site, so I thought I'd highlight a few things to bring you up to date.

  • The new VMware Compliance Center includes an overview of the issues involved with virtualization and compliance, a comprehensive listing of partner virtualization compliance solutions, and references such as white papers and recorded webcasts.
  • There is a new listing of Free Security and Compliance Utilities.  These tools are provided by VMware partners, and can be downloaded and used right away to help assess and monitor your VI deployment
  • The Overview section of the Security Technology site has been updated to present the core issues of virtualization and security in a more streamlined way.  The Resources listing has also been enhanced to include more external resources.
  • Although not new, the VMsafe section had received some updates over the summer which you might not have seen.
  • Finally, something else that's not new but worth pointing out is the Security Certifications page.  We will be listing all security-related certifications that VMware products receive, so you can check here to see ones we have received.

We'll be adding new content to these pages over time, so please be sure to check back regularly.

by Charu Chaubal at October 30, 2008 10:06 PM

Microsoft Hyper-V Ads – Cool Robot!

Virtual Reality

Check out this Microsoft Hyper-V ad that we found yesterday.  I have to say, that is definitely a cool robot! But, perhaps they couldn’t find real customers to spotlight in the ads? ;)

And what’s the robot drinking? Is that Microsoft Kool-Aid?  Actually, what I found really interesting was that the Robot was named, “IT 24-7”, implying continuous uptime for applications and other IT services run on Hyper-V, but did you notice the asterisk? And when you read the fine print at the very bottom of the ad… ;)

All in good fun – Happy Halloween or something...

msft hyperv ad

by Tim Stephan at October 30, 2008 07:11 PM

October 29, 2008

VI 3.5 Memory Statistics Definitions.. and shameless plug for the VMware Performance Community

Developer Center Blog

Folks,

R&D has put together a nice paper on VI 3.5 Memory Statistics Definitions and thought it would be good to post it here. Our plan is to incorporate this performance data into future versions of VI SDK Docs, making it a bit easier to find this data.

Also wanted to let folks out there know about the good work that has been done in the Performance Community.

Stop by and visit: http://communities.vmware.com/community/vmtn/general/performance

-Pablo

by heyitspablo at October 29, 2008 10:10 PM

VMware Server 2.0 on the Roundtable podcast

VMTN Blog

Rick Vanover at SearchVMware.com runs down the recently-released VMware Server 2.0. That will be our topic today on