zfs ±â¹ÝÀÇ iscsi/fc target ¼ÂÆðª

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zvol 설정값 중  writeback cache  어떻게 두고 사용하시는지요?
벤치마크 해보면 위의 값에 따라서 성능차이가 너무 많이 나는것 같아서 다른 분들은 어떻게 사용하시는지 궁금합니다.
ªÀº±Û Àϼö·Ï ½ÅÁßÇÏ°Ô.
±èÀ±¼ú 2015-05
Èıâ·ÏÀ» ½á¾ß ij½¬¸Þ¸ð¸®¸¦ ½á¼­ ¼Óµµ°¡ ºü¸£ÁÒ. Èıâ·Ï ¾È¾²¸é ¾²±â¸ðµå ¾öû ´À·Á¿ä.
     
stone92 2015-05
¸¶Ä§ À±¼ú´Ô²²¼­ ´ä±ÛÀ» Áּ̱º¿ä..¤¾¤¾
¿ª½Ã ±×·¸±º¿ä..±âº»°ªÀÌ disabled  °¡ µÇ¾î À־ ÀÌ»óÇÏ´Ù ½Í¾î¼­ Áú¹® ¿Ã·È½À´Ï´Ù.

¾ÆÁ÷ FC target Å×½ºÆ® Áß ÀÔ´Ï´Ù. º¥Ä¡¸¶Å© °ª ¿Ã·Áµå¸³´Ï´Ù.
¾ÆÁ÷ µð½ºÅ©¸¦ ±¸¸ÅÇÏÁö ¸øÇؼ­ ±¸Çü µð½ºÅ©·Î Å×½ºÆ® ÁßÀÔ´Ï´Ù.

FC Target Server: OmniOS
HP DL180G6,E5520, 16G Ram,Qlogic 2464 quad port 4G
LSI 9211-i8 ITmode,Seagate 3EA,WD blue 2EA,Intel DC S3500

FC initiator:
Dell 2950,windows 2008 R2, Qlogic 2462 dual port 4G

zpool : Seagate 2EA,WD blue 2EA mirror
zvol :100G ÇÒ´ç ÇÏ°í À©µµ¿ì¿¡¼­ ¸¶¿îÆ® ÇÔ



1. default, write cache=disabled
-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
                          Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

          Sequential Read :  366.892 MB/s
          Sequential Write :    6.390 MB/s
        Random Read 512KB :  337.409 MB/s
        Random Write 512KB :    8.588 MB/s
    Random Read 4KB (QD=1) :    34.366 MB/s [  8390.2 IOPS]
  Random Write 4KB (QD=1) :    0.232 MB/s [    56.6 IOPS]
  Random Read 4KB (QD=32) :  211.937 MB/s [ 51742.3 IOPS]
  Random Write 4KB (QD=32) :    2.535 MB/s [  618.9 IOPS]

  Test : 1000 MB [E: 0.1% (0.1/99.9 GB)] (x5)
  Date : 2015/05/08 12:45:05
    OS : Windows Server 2008 R2 Server Standard (full installation) SP1 [6.1 Build 7601] (x64)
    FC target Zvol default,zfs sync=standard,voblocksize=8k

2. default,writecache=enabled
-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
                          Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

          Sequential Read :  366.592 MB/s
          Sequential Write :  333.729 MB/s
        Random Read 512KB :  334.930 MB/s
        Random Write 512KB :  311.166 MB/s
    Random Read 4KB (QD=1) :    35.378 MB/s [  8637.1 IOPS]
  Random Write 4KB (QD=1) :    25.604 MB/s [  6251.0 IOPS]
  Random Read 4KB (QD=32) :  195.171 MB/s [ 47649.1 IOPS]
  Random Write 4KB (QD=32) :  122.042 MB/s [ 29795.5 IOPS]

  Test : 1000 MB [E: 0.1% (0.1/99.9 GB)] (x5)
  Date : 2015/05/08 12:53:09
    OS : Windows Server 2008 R2 Server Standard (full installation) SP1 [6.1 Build 7601] (x64)
    FC target Zvol default,zfs sync=standard,wcd=false


3. default,wc=disabled,ZIL enabled(intel DC S3500 to ZIL)
-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
                          Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

          Sequential Read :  358.733 MB/s
          Sequential Write :  145.595 MB/s
        Random Read 512KB :  330.562 MB/s
        Random Write 512KB :  126.460 MB/s
    Random Read 4KB (QD=1) :    38.346 MB/s [  9361.7 IOPS]
  Random Write 4KB (QD=1) :    12.189 MB/s [  2975.8 IOPS]
  Random Read 4KB (QD=32) :  164.266 MB/s [ 40104.0 IOPS]
  Random Write 4KB (QD=32) :  118.094 MB/s [ 28831.5 IOPS]

  Test : 1000 MB [E: 7.2% (7.1/99.9 GB)] (x5)
  Date : 2015/05/08 13:15:46
    OS : Windows Server 2008 R2 Server Standard (full installation) SP1 [6.1 Build 7601] (x64)
    FC target Zvol default,zfs sync=standard,ZIL(intel DS S3500)=on
±èÀ±¼ú 2015-05
4K ¼Óµµ°¡ µð°Ô Àß³ª¿À³×¿ä. Àú·±¼Óµµ°¡ ³ª¿À³ª SSD ¼ÓµµÀε¥...
     
stone92 2015-05
±×·¯°Ô ¸»ÀÔ´Ï´Ù. ´Ù¸¥ º¥Ä¡¸¶Å©Åøµµ ½áºÁ¾ß µÉ µí ÇÕ´Ï´Ù¸¸..
¿©·¯¹ø º¥Ä¡¸¶Å© Çغôµ¥ Æò±ÕÀûÀ¸·Î ºñ½ÁÇÏ°Ô ³ª¿Ô½À´Ï´Ù.
¾óÃß Å×½ºÆ®´Â °ÅÀÇ ³¡³µ°í µð½ºÅ© »õ·Î µµÂøÇϸé ÃÖÁ¾ ¼Â¾÷ÇÑ ÈÄ¿¡ ÀÚ·á ¸¸µé¾î¼­ ¿Ã·Áµå¸®°Ú½À´Ï´Ù.
18T ÀÌ»ó ±¸ÃàÇÒ ¿¹Á¤ÀÌ½Ã¸é  OmniOS·Î °¡½Ã´Â°Ô ÁÁÀ¸½Ç µí ÇÕ´Ï´Ù.
³Ø¼¾ÅÍ°¡ ÆíÇϱä Çѵ¥.. ±×³É  OmniOS+napp-it Á¶ÇÕµµ ³ª»ÚÁø ¾ÊÀ¸½Ç °Ì´Ï´Ù.
¹Ú¹®Çü 2015-05
¸Þ¸ð¸®°¡ Å©¸é Ŭ¼ö·Ï ´õ »¡¶óÁø´Ù°í µé¾ú½À´Ï´Ù.

ÀÛÀºÈ­ÀÏÀº ¸Þ¸ð¸® À§¿¡¼­ ³í´Ù´Â


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