HP ProLiant MicroServer Owners Club! (Attempting to sell here will result in bans)

Discussion in 'Storage & Backup' started by oli, May 10, 2011.

  1. choppa

    choppa Member

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    Hey GooSE, what are your system specs and how is your ZFS set up? Trying to troubleshoot my abysmal 20MB/s writes...
     
  2. mR_CaESaR

    mR_CaESaR Member

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    2x 8gb Memory modules confirmed to work on the N40L

    Please note that we are not responsible if the ram below does not work for you. The ram listed below has been deemed working for the below posts YMMV. The HP Microserver is spec'd at 8gb max. Buy at your own risk

    Non-ECC
    ECC
     
    Last edited: Jun 21, 2012
  3. mR_CaESaR

    mR_CaESaR Member

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    I'd like to know this as well, I'm getting terrible copy speeds from one N40L to another N40L via windows...

    I suspect that my WD greens will be the main culprit, I'm not too fussed about the write speeds ONCE the data is there, as it'll just be for sharing purposes, it's getting the data on there thats annoying as hell.
     
  4. Osiris

    Osiris Member

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    I wonder: did those who could get the 16GB of ram working use the normal BIOS or the modified one? Could that have anything to do with it?
     
  5. mR_CaESaR

    mR_CaESaR Member

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    I'm running "The Bay's" hacked BIOS
     
  6. Blinky

    Blinky Member

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    STD, straight out of the box.
     
  7. GooSE

    GooSE New Member

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    HP MicroServer N36L
    1x Stock 1GB ECC, 1x Crucial 4GB ECC
    4x 2TB Hitachi 5K3000 (RAID-Z)
    1x 4GB Sandisk Cruzer Blade (boot/system)
    FreeBSD 9.0 Release amd64 (ZFS v28)

    Setting up ZFS was dead easy:

    Code:
    $ echo 'zfs_enable="YES"' >> /etc/rc.conf
    $ /etc/rc.d/zfs start
    $ zpool create tank raidz /dev/ada0 /dev/ada1 /dev/ada2 /dev/ada3
    Do you know if your speed woes are definitely config/drive related and not network or Samba related? Try a quick indicative speed test:

    Code:
    $ dd if=/dev/zero of=/tank/testfile bs=1M count=2048
    2048+0 records in
    2048+0 records out
    2147483648 bytes transferred in 10.558916 secs (203381070 bytes/sec)
     
  8. EMM386

    EMM386 Member

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    I think I can possibly explain Gooses good performance. He's using Hitachi 5K3000 drives which as far as I know are the only large (eg tb+) drives to use native 512b sectors. The rest all use 4kb sector emulated to 512b for the OS. Unless you start your partition on a certain sector so it's divisible by 4. I believe the problem is as the drive is pretending to be 512. The os will write its sector across multiple of the drives real 4k sectors. This causes performance issues. I'm sure someone with a greater understanding and more details will be along in a sec. Think you need to use ashift = 12 when creating partitions in Solaris to do this. I have the links saved somewhere for when the prices are a bit more reasonable and I get my disks. Would really like Hitachi 4th 5K4000 but I see they're also using emulated sectors now. Guess it'll be the 3s
     
  9. sammich

    sammich Member

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    Okay, added. Restarted for good measure, and...still stutters. I see now that there's 'pulseaudio' process now, but VLC still pegs a core.

    And it still stutters :(

    EDIT: okay, it's much smoother in XBMC now. Which is what I'll be using anyway. Still the occasional blip here and there, but much improved.
     
    Last edited: May 19, 2012
  10. Stanza

    Stanza Member

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  11. Blinky

    Blinky Member

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    I saw that and left wondering why my Corsair Value Select doesn't work. :confused:

    Oh well, it's happy in it's new home anyway.
     
  12. GooSE

    GooSE New Member

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    From what I've seen 4K drives do take a slight performance hit, but not nearly as bad as what choppa is describing. 20MB/s tells me that something is definitely wrong.
     
  13. Parkcomm

    Parkcomm Member

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    This link has instructions on how to align the partitions to 4K offsets for zpool create, if this if sector alignment is an issue.

    http://ivoras.net/blog/tree/2011-01-01.freebsd-on-4k-sector-drives.html

    btw - here are my results with zfs 2 disk mirror, and partition unaligned

    $ dd if=/dev/zero of=/Batfink/testfile bs=1M count=2048
    2048+0 records in
    2048+0 records out
    2147483648 bytes transferred in 18.816368 secs (114128488 bytes/sec)

    I don't have a comparison between a four disk to work out if this is good - but I'd expect maybe to be a little higher based on Gooses numbers and the comparison here http://hardforum.com/showthread.php?t=1546137&page=2

    Maybe I'll try the repartition myself, but I have already loaded a lot of data, so it has to be worth the effort.

    I had a single WD green setup for ifs before I got hold of the drives I am using now.

    Results from dd test after alignment: 2147483648 bytes transferred in 207.471624 secs (10350734 bytes/sec)

    Performance was terrible, so possibly they are the culprit . Now to be fair that disk is failing SMART so I've binned it, but I'd expect a failing disk to throw errors, not slow down.

    Run the dd test as suggested by Goose - then you can rule out the other machine, the network and of course Windows.
     
    Last edited: May 20, 2012
  14. quantocks

    quantocks New Member

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    getting lots of XBMC freezing/locking up (the server is still running, can telnet in, etc) lately when playing back 720p TV rips.

    Have to reboot the entire box to get it going again, it's driving me insane. Running Mint 10.00 and XBMC on the N40L with ATI 6450.

    thinking of going to Windows Server 2008 R2, maybe this will give me better stability.

    any ideas what might be causing the lock ups randomly?
     
  15. Menthu_Rae

    Menthu_Rae Member

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    Probably because you are using an ATi card :p Linux + ATi = Headache :tongue:
     
  16. quantocks

    quantocks New Member

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    worked perfectly fine for weeks, just freezing now (only XBMC freezing)
     
  17. Parkcomm

    Parkcomm Member

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    ZFS performance with single disks and (un)aligned sectors:

    Barracuda 7200 unaligned:2147483648 bytes transferred in 41.707252 secs (51489454 bytes/sec)

    Barracuda 7200 aligned:2147483648 bytes transferred in 31.792894 secs (67546026 bytes/sec)

    WD Green unaligned:2147483648 bytes transferred in 169.548670 secs (12665883 bytes/sec)

    So is it worth going through the effort described above to align sectors - For >25% improvement, sure.

    Could a WD Green explain Mr_Ceasers slow performance - I'd say yes, probably because the WD greens drives lack 4K sector advertising, but as I said above, the test disk is flakey.
     
    Last edited: May 21, 2012
  18. Dislexsick

    Dislexsick Member

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    Standard BIOS here.
     
  19. FalconGT

    FalconGT Member

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    Well good that it's helped somewhat. I use XBMC, so can't comment on VLC.

    Are you using Ubuntu 12.04 ?
    If so, fallback to Unity 2D for improved performance.

    More info would be good.
     
    Last edited: May 21, 2012
  20. jani

    jani Member

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    Dec 24, 2001
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    This is write speed, I assume? Do you have write cache enabled in BIOS, cos with my WD Green EARX 2TB drives I'm getting write speeds between 60 and 90 MB/sec write speed for a single drive, and with three in raidz I'm getting write speed up to 160 MB/sec locally and maxing out my gigabit network at 110-125 MB/sec via NFS or Samba.

    here's the bonnie output for the local test on the zpool of the three disks in raidz.
    Code:
    jani@microserver:/mytank/videos$ sudo bonnie++ -u root -d /mytank/videos/ -s 15904M -n 10:102400:1024:1024
    Using uid:0, gid:0.
    Writing a byte at a time...done
    Writing intelligently...done
    Rewriting...done
    Reading a byte at a time...done
    Reading intelligently...done
    start 'em...done...done...done...done...done...
    Create files in sequential order...done.
    Stat files in sequential order...done.
    Delete files in sequential order...done.
    Create files in random order...done.
    Stat files in random order...done.
    Delete files in random order...done.
    Version  1.96       ------Sequential Output------ --Sequential Input- --Random-
    Concurrency   1     -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
    Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
    microserver  15904M    76  99 158985  44 88210  32   191  99 191880  38 221.5  20
    Latency               164ms   38646us    1121ms   56940us     451ms     212ms
    Version  1.96       ------Sequential Create------ --------Random Create--------
    microserver         -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
    files:max:min        /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
    10:102400:1024/1024  1490  47   493  15 13979  96  2013  63   133   3 12004  98
    Latency              1646ms     139ms   10147us   23321us   94233us     276us
    1.96,1.96,microserver,1,1337327344,15904M,,76,99,158985,44,88210,32,191,99,191880,38,221.5,20,10,102400,1024,,1024,1490,47,493,15,13979,96,2013,63,133,3,12004,98,164ms,38646us,1121ms,56940us,451ms,212ms,1646ms,139ms,10147us,23321us,94233us,276us
    
     

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