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Create the foundation for the dynamic and automated data center with VMware ESX - the market leading hypervisor. VMware ESX abstracts server processor, memory, storage and networking resources into multiple virtual machines, forming the robust foundation of the VMware Infrastructure 3 suite.

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Features

Below you will find a comprehensive list of the VMware ESX features.

Architecture

  • Bare-metal architecture.  VMware ESX inserts a robust virtualization layer directly on the server hardware for near-native virtual machine performance, reliability and scalability.
  • Small Footprint.1 VMware ESXi’s 32MB disk footprint is a fraction of the size of a general purpose operating system, reducing complexity and providing unmatched security and reliability.
  • Server Integration.1 VMware ESXi is available built into server hardware as an embedded component, simplifying and speeding deployment of virtualization.
  • CPU virtualization.  Increase server utilization without the risk of critical services being starved for CPU resources. VMware ESX uses intelligent process scheduling and load balancing across available processors to manage the execution of virtual machine processing.
  • Virtualization for storage.  Leverage high performance shared storage to centralize virtual machine file storage for greater manageability, flexibility and availability.
    • Virtual disk files.  Add or delete a VMware ESX server from a VMFS volume without pausing or halting the processing of other instances of VMware ESX
    • VMFS cluster file system.  Leverage high performance shared storage to centralize virtual machine file storage for greater manageability, flexibility and availability
    • Logical volume manager.  Manage the interaction between the physical storage arrays and VMFS with flexibility and reliability
    • Raw device mapping.  Optionally, map SAN LUNs directly to a virtual machine in order to enable application clustering and array-based snapshot technology while profiting from the manageability benefits of VMFS
    • Fibre Channel HBA consolidation.  Share expensive storage network components across many virtual machines while maintaining hardware fault tolerance
    • Write-through I/O.  Ensure precise recovery of virtual machines in the event of server failure. Write-through I/O enables virtual machines to have the same recovery characteristics as a physical system running the same operating system.
    • Boot from SAN.  Run VMware ESX installations on diskless configurations of blade and rack mount servers by booting from SAN. Simplify backups and disaster recovery by eliminating the need to separately backup local attached server disks
  • Virtualization for Networking.  Network virtual machines like physical machines. Build complex networks within a single VMware ESX server or across multiple installations of VMware ESX for production deployments or development and testing purposes.
    • Virtual NICs.  Configure each virtual machine with one or more virtual NICs. Each of those network interfaces can have its own IP address and even its own MAC address. As a result, virtual machines are indistinguishable from physical machines from a networking standpoint
    • Virtual switches.  Create a simulated network within a VMware ESX server with virtual switches that connect virtual machines.
    • Expanded port configuration policies.  Simplify port configuration by utilizing a single configuration object across large groups of ports. The configuration object specifies all information needed to enable a port: NIC teaming policy (now per port instead of per virtual switch), VLAN tagging, Layer 2 security, and traffic shaping.
    • VLAN.  Overlay a logical LAN on top of physical LANs to isolate network traffic for security and load segregation purposes. VMware ESX VLANs are compatible with standard VLAN implementations from other vendors. Modify network configurations without having to change actual cabling and switch setups. VLANs keep broadcast traffic limited to the VLAN, reducing the network load of broadcast packets on other switches and network segments.

      1      Available only for VMware ESXi

Performance and Scalability

  • Leveraging nine years of R&D and experience from more than 120,000 customer deployments, VMware ESX delivers unparalleled performance and scalability. With VMware ESX, even the most resource intensive production applications such as databases, ERP and CRM can be virtualized.
  • Enhanced virtual machine performance.  Benefit from better virtual machine performance in VMware ESX. Performance improvements have been achieved through:
    • Networking performance optimization. Reduce the CPU overhead associated with processing network i/
    • Support for hardware nested page tables. Optimize memory translation time between guest operating systems and physical memor
    • Support for large memory pages. Improve memory access efficiency for guest operating systems and the hypervisor
    • Support for paravirtualized Linux guest operating systems (Linux kernel 2.6.21 onwards). Run higher levels of performance through virtualization-aware operating systems
  • Advanced memory management.
    • RAM over-commitment.  Increase memory utilization by configuring virtual machine memory that safely exceeds the physical server memory. For example, the sum of the memory of all virtual machines running on a server with 8GB physical memory can be 16GB
    • Transparent page sharing.  Utilize available memory more efficiently by storing memory pages identical across multiple virtual machines only once. For example, if several virtual machines are running Windows Server 2003, they will have many identical memory pages. Transparent page sharing consolidates those identical pages into a single memory location.
    • Memory ballooning.  Shift memory dynamically from idle virtual machines to active ones. Memory ballooning artificially induces memory pressure within idle virtual machines, forcing them to use their own paging areas and release memory for active virtual machines.
  • Improved power management.  Lower the data center utility bill with improved power management. VMware ESX enters a low power “halt” state when a CPU is not scheduled.
  • 4-Way Virtual SMP.  Enable a single virtual machine to use up to four physical processors simultaneously. VMware ESX extends this unique feature from two to four processors. With 4-way Virtual SMP even the most processor intensive software applications like databases and messaging servers can be virtualized.
  • 64GB RAM for virtual machines.  Run the most memory-intensive workloads in virtual machines with a memory limit extended to 64GB.
  • Support for powerful physical server systems.  Take advantage of very large server systems with up to 32 logical CPUs and 256GB RAM for large scale server consolidation and DR projects.
  • Support for up to 128 powered-on virtual machines.  Take advantage of very large server systems for enterprise-class server consolidation and containment with support for up to 128 powered on virtual machines on a single server. 
  • Flexible virtual switches.  Scale up to handle more virtual machines. Virtual switches can be created with any number of ports from 8 to 1016, and up to 248 virtual switches are supported per host.
  • Wake-on LAN.  Enable higher consolidation ratios by allowing virtual machines to go on stand-by mode when not used.

Interoperability

  • VMware ESX is the only virtualization platform optimized, rigorously tested and certified across the complete IT stack of servers, storage, operating systems, and software applications allowing for enterprise-wide standardization.
  • Hardware.  VMware ESX has been certified with industry-leading rack, tower and blade servers from Dell, Fujitsu Siemens, HP, IBM, NEC, Sun Microsystems and Unisys as well as servers that conform to Intel white-box standard specifications.
  • VMware ESXi is integrated into server hardware guaranteeing that virtualization works out of the box.
  • Storage.  VMware ESX is certified with a wide range of storage systems from, Dell, EMC, EqualLogic, Fujitsu, Fujitsu Siemens, HP, Hitachi Data Systems, IBM, NEC, Network Appliance, StorageTek, Sun Microsystems and 3PAR and many other vendors.
    • Heterogeneous storage arrays.  Utilize a wide variety of heterogeneous storage devices in the same VMFS volume
    • NAS and iSCSI SAN support.  By supporting lower-cost, more easily managed shared storage, VMware ESX further reduces total cost of ownership of IT environments. Advanced VMware Infrastructure features like VMotion and VMware HA are fully supported with NAS and iSCSI environments
    • 4GB Fibre Channel SAN support.  Centralize management and configuration of all VMware ESX servers in VirtualCenter.
    • Local SATA storage support. Use select servers with local SATA storage to further lower total cost of ownership while consolidating workloads
  • Networking. Use high performance networking such as 10 Gig E and Infiniband with  VMware ESX 3.5 and VMware ESXi 3.5 for the most network intensive workloads
  • Operating systems.  Run any software application in VMware virtual machines.
    • 64-bit guest operating system suppor
    • Solaris 10 operating system suppor
    • Windows Vista operating system support
    • Ubuntu guest operating system support
  • Software applications with third party systems management products through Web services APIs provided by the VMware Infrastructure SDK.
  • Support for other virtual machine formats.  VMware ESX can run virtual machines created in non-VMware formats. Using the free VMware Virtual Machine Importer users can run Microsoft® Virtual Server and Virtual PC, and Symantec® LiveState Recovery virtual machines in VMware ESX.

Management

  • Remote Command Line Interface. Manage VMware ESXi through a remote execution environment that can run VMware ESX command scripts.
  • Advanced manageability and usability features.  VMware ESX enables management of entire virtualized IT environment.
  • SMI-S-Compliant Management Interfaces.  Monitor virtual storage using any standard SMI-S-aware storage management tool.
  • Virtual Infrastructure Client.  Manage VMware ESX, virtual machines, and (optionally) VirtualCenter Server with a common user interface.
  • Virtual Infrastructure Web Access.  Manage VMware ESX with simple Web interface (formerly known as the Management User Interface, or MUI).
  • Virtual machine shortcuts.  Enable self-help for end users with direct access to virtual machines through a Web browser.
  • Remote devices.  Install software in a virtual machine running on a server from the CD-ROM of a desktop without leaving your desk.
  • Agent-less Hardware Management with CIM.  The Common Information Model (CIM) provides a protocol for monitoring hardware health and status through VirtualCenter or CIM-compatible 3rd party tools.

Resource Optimization

  • Resource management for virtual machines. Define advanced resource allocation policies for virtual machines to improve service levels to software applications. Establish minimum, maximum, and proportional resource shares for CPU, memory, disk and network bandwidth. Modify allocations while virtual machines are running. Enable applications to dynamically acquire more resources to accommodate peak performance.
    • CPU capacity prioritization.   CPU capacity is assigned to virtual machines on a “fair share” basis and CPU resource controls also allow an absolute minimum level of CPU capacity to be provided to critical virtual machines
    • Storage I/O traffic prioritization.  Ensure that critical virtual machines receive priority access to storage devices. I/O traffic from virtual machines to disk can be prioritized on a “fair share” basis.
    • Network Traffic Shaper.  Ensure that critical virtual machines receive priority access to network bandwidth. Network traffic from virtual machines can be prioritized on a “fair share” basis. Network Traffic Shaper manages virtual machine network traffic to meet peak bandwidth, average bandwidth and burst size constraints.
  • Resource Pools.  Aggregate collections of hardware resources virtualized by VMware ESX into unified logical resources that can be allocated to virtual machines on-demand. Resource pools increase flexibility and hardware utilization.

High Availability

  • VMware ESX delivers data center-class high availability for virtual machines.
  • Shared storage.  Eliminate single points of failure by storing virtual machine files on shared storage such as Fibre Channel or iSCSI SAN, or NAS. Use SAN mirroring and replication features to keep updated copies of virtual disk at disaster recovery sites.
  • SAN transparency.  Use native SAN storage for virtual machines with the same ease and flexibility as virtual disk files. Raw device mapping lets virtual machines use standard SAN LUN data stores in addition to special-purpose VMFS formatted LUNs for virtual disk files. Offload file-level backup and replication of virtual machine data to SAN-based utilities. Easily configure clusters of virtual and physical machines with shared SAN data stores for cost effective high availability.
  • Built-in storage access multipathing.  Ensure shared storage availability with SAN multipathing for Fibre Channel or iSCSI SAN, and NIC teaming for NAS.
  • Enhanced NIC teaming.  Give each networked virtual machine built-in NIC failover and load balancing enabling greater hardware availability and fault tolerance.  New NIC teaming policies allow users to configure multiple active and standby adapters. Teaming configuration may be different for different port groups on the same virtual switch and different groups can even select different teaming algorithms for the same team.
  • Distributed journaling.  Recover virtual machines faster and more reliably in the event of server failure.
  • Support for Microsoft® Clustering Services.  Cluster virtual machines running Microsoft® Windows operating system across physical hosts.

Security

  • Compatibility with SAN security practices.  Enforce security policies with LUN zoning and LUN masking.
  • VLAN tagging.  Enhance network security by tagging and filtering network traffic on VLANs. Limit the scope of broadcast domains.
  • Layer 2 network security policies.  Enforce security for virtual machines at the Ethernet layer. Disallow promiscuous mode sniffing of network traffic, MAC address changes, and forged source MAC transmits.

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