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Hyper V Setup

Yanıt Hyper V Setup

  • 30 Nisan 2012 Pazartesi 07:58
     
     
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    Running 4 VMs with Active Directory, Exchange 2003, Files and SQL. (40 Users) Will a setup of RAID 1  for the Hyper V Core OS and 6 Drives  WD RE4 SATA 7200RPM running in RAID 10 do for this load? Please share some advice.
     

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  • 30 Nisan 2012 Pazartesi 09:17
     
     
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    Hi,

    To optimize the performance of the domain controller virtual machine, use the following recommendations for storing operating system, Active Directory, and VHD files:

    • Guest storage. Store the Active Directory database file (Ntds.dit), log files, and SYSVOL files on a separate virtual disk from the operating system files. Integration Components must be installed so that synthetic drivers can be used for Integrated Drive Electronics (IDE) instead of emulation. Virtual SCSI and IDE disks perform at the same speed when they use synthetic drivers.
    • Host storage of VHD files. Recommendations: Host storage recommendations address storage of VHD files. For maximum performance, do not store VHD files on a disk that is used frequently by other services or applications, such as the system disk on which the host Windows operating system is installed. Store each VHD file on a separate partition from the host operating system and any other VHD files. The ideal configuration is to store each VHD file on a separate physical drive. 
    • Fixed VHD versus pass-through disks. There are many ways to configure storage for virtual machines. When VHD files are used, fixed-size VHDs are more efficient than dynamic VHDs because the memory for fixed-size VHDs is allocated when they are created. Pass-through disks, which virtual machines can use to access physical storage media, are even more optimized for performance. Pass-through disks are essentially physical disks or logical unit numbers (LUNs) that are attached to a virtual machine. Pass-through disks do not support the snapshot feature. Therefore, pass-through disks are the preferred hard disk configuration, because the use of snapshots with domain controllers is not recommended. 
    • Do not pause, stop, or store the saved state of a domain controller in a virtual machine for time periods longer than the tombstone lifetime of the forest and then resume from the paused or saved state. Doing this can interfere with replication. To learn how to determine the tombstone lifetime for the forest.
    • Do not copy or clone virtual hard disks (VHDs).
    • Do not take or use a Snapshot of a virtual domain controller. 
    • Do not use a differencing disk VHD on a virtual machine that is configured as a domain controller. This makes reverting to a previous version too easy, and it also decreases performance. 
    • Do not use the Export feature on a virtual machine that is running a domain controller. 
    • Do not restore a domain controller or attempt to roll back the contents of an Active Directory database by any means other than using a supported backup. For more information, 


    Best regards Bourbita Thameur Microsoft Certified Technology Specialist: Windows Server 2008 R2,Server Virtualizaton

     
  • 30 Nisan 2012 Pazartesi 09:27
     
     
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    assuming your budget is limited, the setup sounds like the best you can do with the mentioned hardware. if its enough is hard to tell without knowing the real i/o load. if possible (if the systems already exist as physicla machines), try to measure current io and compare it with the expected performance of your raid 10. if the load increases, you have the option to attach more storage later and move vhd's (downtime). or assuming your server has 8 hdd slots and you dont want to attach a storage encloser, theres the option to add a ssd pci card and move vhd's there if io isnt enough for oyur scenario
     
  • 30 Nisan 2012 Pazartesi 09:34
     
     
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    @  FZB > Yes budget is very limited. Currently this is already Virtual Machines, but running in RAID 5 (Sata Drives) but with on-board RAID, so I want to change to Hardware RAID but with the optimal setup for my VMs
     
  • 30 Nisan 2012 Pazartesi 12:28
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    Hi,

    Another option is to create a RAID 10 with all 8 disks(if possible), this will increase the disk performance. You can put operating system in one partition and virtual machines in one or several partitions. If this one is not acceptable, your current options is the best one.

    • Yanıt Olarak İşaretleyen André Hanekom 30 Nisan 2012 Pazartesi 12:31
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