Storage Spaces = Parity speed increase

Discussion in 'Windows Operating Systems' started by LostBenji, Nov 7, 2012.

  1. LostBenji

    LostBenji Member

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    For those wanting to see some reasonable speeds with Parity in Storage Spaces:

    <Storage Pool Name> = the Pools name, remove the < >

    Smaller disk-count arrays are always likely to be slow write, using bigger arrays of 6-8 drives will see decent speeds.
     
    Last edited: Aug 6, 2013
  2. Nhutty

    Nhutty Member

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    going to try this tonight, thanks for the tip!

    created a 3 drive storage space last night and did notice awefully slow transfer speeds to it (under 30MB/s) so hopefully this will give me full speed again
     
  3. UserInterface

    UserInterface Member

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    Thanks worked it out.
     
    Last edited: Nov 8, 2012
  4. UserInterface

    UserInterface Member

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    No sure if it make a big enough difference here's my results.

    Before any changes are made:
    [​IMG]

    After PS change made:
    [​IMG]

    After PS change and a reboot:
    [​IMG]
     
  5. OP
    OP
    LostBenji

    LostBenji Member

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    Last edited: Apr 2, 2013
  6. UserInterface

    UserInterface Member

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    haha, yeah it's a storage space so it's thin provisioned. I have about 6-7 3TB WD Green drives. Would be nice even if it was that slow to have 50TB just sitting there.. Not that I could ever fill it up.
     
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    LostBenji

    LostBenji Member

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    Last edited: Apr 2, 2013
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    LostBenji

    LostBenji Member

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  9. UserInterface

    UserInterface Member

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    Has anyone used StableBit DrivePool?
    I wonder if this is any better but don't have the drives to test it on..
     
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    LostBenji

    LostBenji Member

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  11. elvis

    elvis Old school old fool

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    36MB/s on a 5 drive stripe? :lol:
     
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    LostBenji

    LostBenji Member

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    Last edited: Apr 2, 2013
  13. elvis

    elvis Old school old fool

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    8 commodity SATA disk RAID6 on low end hardware using Linux software RAID yields ~500MB/s reads, ~300MB/s writes.

    Storage spaces is a bad joke. Stick to FreeNAS if you want easy storage at home.
     
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    LostBenji

    LostBenji Member

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    Last edited: Apr 2, 2013
  15. styluspilot

    styluspilot Member

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    Seeing as this is related,

    I have been playing with Storage Spaces today and like others the first thing I noticed was the abysmal performance with parity spaces by default.

    I have since done 2 things,

    1. Enable Power Protected mode

    Set-StoragePool -FriendlyName <Storage Pool Name> -IsPowerProtected $True

    2. Added 2x SSD's as a dedicated journal

    The write speeds went from a horrible 25MB/sec to 90MB/sec getting close to what I was with using FreeNAS on the same hardware (this was just testing copying a file over SMB so my own machine and network (1GB NIC) were the limits here, will be using something like ATTO later on to compare.

    What I don't get is, from the Microsoft documentation it says you need to scale the number of journal drives with the number of parity spaces (columns)

    and of course you need to x2 on the journal drives as they are mirrored.

    Does this mean that If I create:

    • A Virtual Disk with 2 Columns I need 4x SSD's for a journal
    • A Virtual Disk with 6 Columns I need 12x SSD's for a journal

    That seems a bit extreme and makes ZFS + L2ARC/ZIL much more efficient, not to mention better performing.

    EDIT: OR, are they referring to journal per parity space, (ie Single, but can be Dual in 2012 R2)

    so would be 2 SSD's for a single parity space and 4 SSD's for a dual parity space.
     
    Last edited: Aug 5, 2013
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    LostBenji

    LostBenji Member

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    I forgot I had this thread here, nice NECRO buddy.


    As for the SSD caching, I don't bother with them as I have better uses of my SSD's.

    I have 2x 8-drive arrays, both each see 85-95MB/sec writes with 400+ reads.
     
  17. Grvm

    Grvm (Banned or Deleted)

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    Those speeds are pretty ordinary, on a hardware card (9265) on a 8 drive raid 6 I see around the 950 MB's read and around 700MB's write.

    That's sequential, random read/write drops it a fair bit (as you would expect)
     
  18. luke o

    luke o Member

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    Played with storage spaces, seems like cancer to me. Just couldn't get it going nicely. Ended up building a 10TB FreeNAS box, been solid, reliable and fast (saturates dual gigabit intel NIC's streaming to multiple PC's without issue).
     
  19. fad

    fad Member

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    I found that too
     

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