Results 1 to 8 of 8
  1. #1
    Super Moderator BATcher's Avatar
    Join Date
    Feb 2008
    Location
    A cultural area in SW England
    Posts
    3,414
    Thanks
    33
    Thanked 195 Times in 175 Posts

    What cluster size for these disks?

    We have a 15,000 rpm, 4 SAS drive, RAID-5 disk array to run Terminal Server on Windows Server 2003 R2.

    What NTFS cluster/allocation size would you use for this situation?
    <UL><LI>512 bytes?<LI>the default 4 KB?<LI>64 KB?[/list]and why?
    BATcher

    Time prevents everything happening all at once...

  2. #2
    Uranium Lounger viking33's Avatar
    Join Date
    Jun 2002
    Location
    Cape Cod, Massachusetts, USA
    Posts
    6,308
    Thanks
    0
    Thanked 1 Time in 1 Post

    Re: What cluster size for these disks?

    There is a good article on optimizing NTFS HERE

    Rather than quoting it I'll provide the link to it.
    BOB
    http://lounge.windowssecrets.com/S/flags/USA.gif http://lounge.windowssecrets.com/S/f...sachusetts.gif


    Long ago, there was a time when men cursed and beat on the ground with sticks. It was called witchcraft.
    Today it is called golf!

  3. #3
    Super Moderator BATcher's Avatar
    Join Date
    Feb 2008
    Location
    A cultural area in SW England
    Posts
    3,414
    Thanks
    33
    Thanked 195 Times in 175 Posts

    Re: What cluster size for these disks?

    Sorry, I was hoping for something more recent!

    I was wondering whether very fast RAID-5 disks and Terminal Server would have any effect on what NTFS cluster size you might choose.
    BATcher

    Time prevents everything happening all at once...

  4. #4
    Uranium Lounger viking33's Avatar
    Join Date
    Jun 2002
    Location
    Cape Cod, Massachusetts, USA
    Posts
    6,308
    Thanks
    0
    Thanked 1 Time in 1 Post

    Re: What cluster size for these disks?

    I don't know that speed would be as much a factor as economy of usable space, however, others may chip in here or you might want to Google the subject and be more selective in the information provided.
    BOB
    http://lounge.windowssecrets.com/S/flags/USA.gif http://lounge.windowssecrets.com/S/f...sachusetts.gif


    Long ago, there was a time when men cursed and beat on the ground with sticks. It was called witchcraft.
    Today it is called golf!

  5. #5
    Administrator
    Join Date
    Mar 2001
    Location
    St Louis, Missouri, USA
    Posts
    23,577
    Thanks
    5
    Thanked 1,057 Times in 926 Posts

    Re: What cluster size for these disks?

    My general feeling about this sort of configuration questions is that you shuld go with the default setting unless you know some specific information about the applications, files, & uses that would indicate that a different cluster size would provide a better utilitization of the disks. The default usually provides a pretty good balance between performance and utilitzation for general usage.

    Joe
    Joe

  6. #6
    Super Moderator BATcher's Avatar
    Join Date
    Feb 2008
    Location
    A cultural area in SW England
    Posts
    3,414
    Thanks
    33
    Thanked 195 Times in 175 Posts

    Re: What cluster size for these disks?

    Before the (single!) application is loaded, Defrag tells me that the average file-size is 361 KB - and I would think that most people's servers would have a larger value? So it could be argued that the (maximum) cluster size of 64 KB might be the most efficient for all Windows server systems.

    It may be a bit academic, though, because without having a copy of Server Magic (or equivalent?) I probably won't be able to change the NTFS cluster size without a complete reformat and reinstall (no thanks!)...
    BATcher

    Time prevents everything happening all at once...

  7. #7
    Administrator
    Join Date
    Mar 2001
    Location
    St Louis, Missouri, USA
    Posts
    23,577
    Thanks
    5
    Thanked 1,057 Times in 926 Posts

    Re: What cluster size for these disks?

    Be careful with averages. A few very large files can skew an average tremenously. If the majority of the files that are stored and modified are smaller then a larger cluster size just wastes space. Operating system files tend to be static. User files will be more dynamic.

    Joe
    Joe

  8. #8
    Super Moderator BATcher's Avatar
    Join Date
    Feb 2008
    Location
    A cultural area in SW England
    Posts
    3,414
    Thanks
    33
    Thanked 195 Times in 175 Posts

    Re: What cluster size for these disks?

    In fact the 'application' is an Access data base which, after being compressed, starts at 75 MB. Randomly, every week or two, after being used on a daily basis, the size suddenly jumps by 50 or 60 MB and stays there for another week or two, then jumps again, and so on (it has been observed for 3 months so far). Currently it is at 450 MB, and I'm thinking it might be time for another compress...
    BATcher

    Time prevents everything happening all at once...

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •