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  FreeBSD 7.x¿¡¼­ ZFS »ç¿ë & ¼º´É ÀÛ¼ºÀÏ : 2009/02/25 18:52
 
  • ±Û¾´ÀÌ : ÁÁÀºÁøÈ£ ( http://coffeenix.net/ )
  • Á¶È¸¼ö : 11622
          [ ÀÌÀüÈ­¸é / ¼öÁ¤ ]   ºñ¹Ð¹øÈ£ :     Àμâ¿ë È­¸é
      Á¦  ¸ñ : FreeBSD 7.x¿¡¼­ ZFS »ç¿ë & ¼º´É
    ÀÛ¼ºÀÚ : ÁÁÀºÁøÈ£(truefeel)
    ÀÛ¼ºÀÏ : 2009.2.16(¿ù)
    Á¤¸®ÀÏ : 2009.2.20(±Ý)



    FreeBSD 7.0ºÎÅÍ´Â ¿ÀǼֶ󸮽ºÀÇ ZFS(Zettabyte File System)À» »ç¿ëÇÒ ¼ö ÀÖ´Ù. ZFS´Â ÆÄÀϽýºÅÛ°ú º¼·ý°ü¸®ÀÚ°¡ ÅëÇյǾî ÀÖ´Â ÀåÁ¡À» ÃÖ´ëÇÑ »ì·Á Çѵΰ³ÀÇ °úÁ¤¸¸À¸·Î ÆÄÀϽýºÅÛÀ» ¹Ù·Î »ç¿ëÇÒ ¼ö ÀÖ´Ù. ¶ÇÇÑ ¸¶Ä¡ ÂûÈëÀ» ºÙ¿´´Ù ¶¼¾ú´Ù ÇÏ´Â µíÇÑ ´À³¦À¸·Î º¼·ý °ü¸®ÀÇ À¯¿¬¼ºÀ» ¸À º¼ ¼ö ÀÖ´Ù. ±×·¯³ª FreeBSD¿¡¼­´Â ¾ÆÁ÷ ½ÇÇèÀûÀ¸·Î µ¿ÀÛÁßÀ̸ç, IO ¼º´É ¶ÇÇÑ ¸¸Á·½º·´Áö ¸øÇÏ´Ù. °á±¹ FreeBSD¿¡¼­ ¸¸Å­Àº ¹Ì·¡¸¦ À§ÇØ ¸Àº¸±â¿ë ÆÄÀϽýºÅÛ·Î Áñ±â¸é µÉ µí ½Í´Ù.

    °£´ÜÇÑ ZFSÀÇ Æ¯Â¡À» Á¤¸®Çϸé.

    - ÆÄÀϽýºÅÛ + º¼·ý°ü¸®ÀÚ°¡ ÅëÇյǾú´Ù.
    - 128ºñÆ® ÆÄÀϽýºÅÛÀ̸ç, µð·ºÅ丮¿Í ÆÄÀÏÀÇ °¹¼ö¿¡ Á¦ÇÑÀÌ ¾ø´Ù.
    - ¹Ì·¯¸µ, ±×¸®°í RAID±â´É¿¡ ÇØ´çÇÏ´Â raidz¸¦ Áö¿øÇÑ´Ù.
    - ¹°¸®Àû disk¸¦ ½±°Ô ½ºÅ丮Áö Ç®¿¡ Ãß°¡ÇÒ ¼ö ÀÖ´Ù.
    - »óÅ ¸ð´ÏÅ͸µÀÌ È¿°úÀûÀÌ´Ù. (iostat, status, history, get µî)
    - ½º³À¼¦ ±â´ÉÀ» Áö¿øÇÑ´Ù.

    1. ZFS Ç®°ú ÆÄÀϽýºÅÛ »ý¼º (zpool create, zfs create, zpool list, zfs list)

     
    # zpool create data mfid0s1h
    # zpool list
    NAME                    SIZE    USED   AVAIL    CAP  HEALTH     ALTROOT
    data                   31.8G    110K   31.7G     0%  ONLINE     -
    # df -t zfs
    Filesystem    1K-blocks    Used    Avail Capacity  Mounted on
    data           32771968       0 32771968     0%    /data
     


    zpool create ¸í·É¸¸À¸·Î ½±°Ô '½ºÅ丮Áö Ç®'À» »ý¼ºÇß´Ù. ÀÌ ¸í·É Çϳª¸¸À¸·Î ¹Ù·Î ÆÄÀϽýºÅÛÀ» ÀÌ¿ëÇÒ ¼ö°¡ ÀÖ´Ù. ¸Å¿ì °£´ÜÇÏÁö ¾Ê´Â°¡?
    ¸®´ª½ºÀÇ LVM°ú ºñ±³Çغ¸ÀÚ. LVMÀº PV »ý¼º -> VG »ý¼º -> LV »ý¼ºÀÇ 3°úÁ¤À» °ÅÃÄ¾ß ÇÑ´Ù. 1) µð½ºÅ©³ª ÆÄƼ¼ÇÀ» LVMÀ¸·Î »ç¿ëÇÏ°Ú´Ù°í ¼±¾ðÇÏ´Â PV(Physical Volume) »ý¼º(pvcreate) °úÁ¤. 2) ÀÌÈÄ PV¸¦ ÇϳªÀÇ Å« µ¢¾î¸®·Î ¹­´Â VG(Volume Group) »ý¼º(vgcreate) °úÁ¤. 3) ÇÊ¿äÇÑ ¸¸Å­¸¸ ¶¼¾î ³»¾î ½ÇÁ¦ »ç¿ë°¡´ÉÇÑ ÆÄÀϽýºÅÛÀ¸·Î ¸¸µå´Â LV(Logical Volume) »ý¼º °úÁ¤. ÀÌ¿Í ºñ±³Çϸé zfs´Â Á¤¸» °£´ÜÇÏ´Ù.

    ÀÌÁ¦ ÇϳªÀÇ Ç®¿¡ ¿©·¯ ÆÄÀϽýºÅÛÀ» ¸¸µé¾îº¸ÀÚ.

     
    # zfs create data/backup
    # zfs create data/log
    # zfs create data/photo
    # zfs list
    NAME          USED  AVAIL  REFER  MOUNTPOINT
    data          182K  31.3G    22K  /data
    data/backup    18K  31.3G    18K  /data/backup
    data/log       18K  31.3G    18K  /data/log
    data/photo     18K  31.3G    18K  /data/photo
     


    data Ç®¿¡ data/backup, data/log, data/photo ÆÄÀϽýºÅÛÀ» »ý¼ºÇß´Ù. ±×·±µ¥ ¸¶¿îÆ®Æ÷ÀÎÆ®°¡ ¸ðµÎ /data ¾Æ·¡·Î »ý¼ºµÇ¾ú´Âµ¥, ´Ù¸¥ °÷À¸·Î ÇÒ ¼ö´Â ¾øÀ»±î? zfs set ¸í·É Çϳª¸é ¹Ù·Î º¯°æ °¡´ÉÇÏ´Ù. ¶Ç´Â »ý¼ºÇÒ ¶§ -o mountmpoint=/backup ¿É¼ÇÀ¸·Î ÁöÁ¤ÇÒ ¼ö ÀÖ´Ù.
    (¡Ø zfs get all ¶Ç´Â zfs get mountpoint·Î ¼Ó¼º Á¤º¸¸¦ ¾òÀ» ¼ö ÀÖ´Ù.)

     
    # zfs set mountpoint=/backup data/backup
    # zfs list /backup
    NAME          USED  AVAIL  REFER  MOUNTPOINT
    data/backup    18K  31.3G    18K  /backup
    # df -h -t zfs
    Filesystem    1K-blocks    Used    Avail Capacity  Mounted on
    data              31G      0B     31G     0%    /data
    data/log          31G      0B     31G     0%    /data/log
    data/photo        31G      0B     31G     0%    /data/photo
    data/backup       31G      0B     31G     0%    /backup
     


    À§ÀÇ ÆÄƼ¼ÇÀ» º¸¸é ¿ë·®ÀÌ ¸ðµÎ 31GB·Î Ç¥½ÃµÇ¾ú´Ù. zfsÀÇ °¢ ÆÄƼ¼ÇÀÌ '½ºÅ丮Áö Ç®'ÀÇ ÃÖ´ë ¿ë·®±îÁö ÇÔ²² »ç¿ëÇϱ⠶§¹®ÀÌ´Ù. data/photo ÆÄƼ¼ÇÀº 5G¸¸ »ç¿ëÇ϶ó°í ÄõÅ͸¦ ÇÒ´çÇغ¸ÀÚ. ÀÌ ÄõÅÍ´Â Çã¿ëÄ¡¸¸Å­ ´Ã¸± ¼öµµ ÁÙÀÏ ¼öµµ ÀÖ´Ù. ¸®´ª½ºÀÇ LVMÀÌ È®ÀåÇÏ´Â °Í¸¸ °¡´É(lvextend)ÇÑ °Í°ú ºñ±³ÇÏ¸é »ó´çÈ÷ À¯¿¬ÇÑ ÀÚ¼¼¸¦ ÃëÇÏ°í ÀÖ´Ù.

     
    # zfs set quota=5g data/photo
    # zfs list data/photo
    NAME         USED  AVAIL  REFER  MOUNTPOINT
    data/photo    18K  5.00G    18K  /data/photo
    #
    # zfs set quota=3g data/photo
    # zfs list data/photo
    NAME         USED  AVAIL  REFER  MOUNTPOINT
    data/photo    18K  3.00G    18K  /data/photo
    #
    # df -h data/photo
    Filesystem    Size    Used   Avail Capacity  Mounted on
    data/photo    3.0G    128K    3.0G     0%    /data/photo
     


    ¸¸¾à ´Ù¸¥ ÆÄƼ¼Ç¿¡¼­ ¿ë·®À» »ç¿ëÇÏ°Ô µÇ¸é ±× ¾ç¸¸Å­ ´Ù¸¥ ÆÄƼ¼ÇÀº »ç¿ëÇÒ °ø°£ÀÌ ÁÙ°Ô µÈ´Ù. ¾Æ·¡¸¦ º¸¸é /data/log°¡ 11G¸¦ »ç¿ëÁßÀÌ´Ù. ±×·¡¼­ ´Ù¸¥ ÆÄƼ¼ÇÀº 31GB-11GB »« ¿ë·®ÀÌ Àüü »çÀÌÁî·Î Ç¥ÇöµÈ´Ù.

     
    # df -h -t zfs
    Filesystem     Size    Used   Avail Capacity  Mounted on
    data            20G      0B     20G     0%    /data
    data/log        31G     11G     20G    35%    /data/log
    data/photo     3.0G    128K    3.0G     0%    /data/photo
    data/backup     20G      0B     20G     0%    /backup
     


    ZFS´Â ÀÚü¿¡ µ¥ÀÌÅÍ ¾ÈÁ¤¼ºÀ» ³ôÀ» ³ôÀÌ´Â mirror¿Í RAID-Z ±â´ÉÀ» Á¦°øÇÑ´Ù. mirror±â´ÉÀ¸·Î Ç®À» ¸¸µé¾î º¸ÀÚ.

     
    # zpool create backup mirror mfid1 mfid3
    # df -h -t zfs
    Filesystem    Size    Used   Avail Capacity  Mounted on
    backup         66G      0B     66G     0%    /backup
     


    µð½ºÅ©´Â SAS 73GBÂ¥¸®ÀÌ´Ù. ufs ¶Ç´Â zfs·Î 1°³ÀÇ ÆÄÀϽýºÅÛÀ» ¸¸µé¸é 66GB°¡ ³ª¿Â´Ù. 2°³ µð½ºÅ©Àε¥, 132GB°¡ ¾Æ´Ñ 66GB·Î Ç¥½ÃµÇ´Â °ÍÀº mirror·Î »ý¼ºµÇ¾úÀ½À» º¸¿©ÁØ´Ù. mirror·Î ¼³Á¤µÇ¾î ÀÖ´ÂÁö È®ÀÎÇÏ´Â ¹æ¹ýÀº µÚ¿¡¼­ ´Ù½Ã ¾ê±âÇÏ°Ú´Ù.

    2. zfs´Â ´ç½ÅÀÌ ÇÑ ÀÏÀ» ¸ðµÎ ¾Ë°í ÀÖ´Ù. (zfs history)

     
    # zpool history
    History for 'data':
    2009-02-16.18:32:06 zpool create data mfid0s1h
    2009-02-16.18:33:23 zfs create data/backup
    2009-02-16.18:33:31 zfs create data/log
    2009-02-16.18:33:50 zfs create data/photo
    2009-02-16.18:35:19 zfs set mountpoint=/backup data/backup
    2009-02-16.18:41:17 zfs create -o mountpoint=/work data/work
    2009-02-16.18:51:07 zfs set quota=5g data/photo
    2009-02-16.19:00:09 zfs set quota=3g data/photo
    2009-02-16.19:16:41 zfs set quota=5g data/photo
    2009-02-16.19:21:36 zfs set quota=3g data/photo
    2009-02-16.19:28:49 zfs destroy data/work
     


    'data' Ç®¿¡ Àû¿ëµÈ ÀÛ¾÷ÀÌ ¸ðµÎ ³ª¿Ô´Ù.

    3. »óÅ »ìÆ캸±â (zpool iostat, zpool status)

     
    # zpool iostat 2
                   capacity     operations    bandwidth
    pool         used  avail   read  write   read  write
    ----------  -----  -----  -----  -----  -----  -----
    data        11.4G  20.4G      8     63   881K  1.58M
    data        11.6G  20.1G      0  1.75K  32.0K   128M
    data        11.9G  19.9G      0  1.88K  64.0K   133M
    data        12.1G  19.7G      0  2.09K  32.0K   128M
    data        12.3G  19.4G      0  2.17K  64.0K   131M
    data        12.6G  19.2G      0  2.20K  32.0K   137M
    data        12.8G  18.9G      0  2.33K  32.0K   139M
    data        12.9G  18.9G    610  1.49K  75.8M  77.8M
    data        12.9G  18.9G    521  1.61K  65.0M  89.7M
    data        12.9G  18.9G    615  1.35K  76.5M  71.2M
     


    IO »óŸ¦ 2ÃÊ°£°ÝÀ¸·Î »ìÆ캻 °ÍÀÌ´Ù. ¸®´ª½º³ª FreeBSD¿¡¼­ iostat¸¦ ÇغÃÀ» °ÍÀÌ´Ù. iostat´Â µð½ºÅ©º°·Î IO¸¦ º¸´Â °ÍÀ̸ç, zpool iostat´Â '½ºÅ丮Áö Ç®'º°·Î »ìÆ캸´Â °ÍÀÌ´Ù. 'data' Ç®ÀÇ ONLINE»óŸ¦ È®ÀÎÇÒ ¼ö ÀÖ´Ù.

     
    # zpool status
      pool: data
    state: ONLINE
    scrub: none requested
    config:

            NAME        STATE     READ WRITE CKSUM
            data        ONLINE       0     0     0
              mfid0s1h  ONLINE       0     0     0
     


    ´ÙÀ½Àº 'backup'Ç®ÀÌ mfid1, mfid3 2°³ disk¸¦ »ç¿ëÇÏ¿© mirrorµÇ¾î ÀÖ´Â °ÍÀ» º¼ ¼ö ÀÖ´Ù.

     
    # zpool status
      pool: backup
    state: ONLINE
    scrub: none requested
    config:

            NAME        STATE     READ WRITE CKSUM
            backup      ONLINE       0     0     0
              mirror    ONLINE       0     0     0
                mfid1   ONLINE       0     0     0
                mfid3   ONLINE       0     0     0

    errors: No known data errors
     


    4. ZFS Ç®°ú ÆÄÀϽýºÅÛ unmount & Áö¿ì±â (zpool destroy, zfs umount, zfs destroy)

    ÆÄÀϽýºÅÛ¸¦ umountÇϱâ À§Çؼ­´Â 'zfs umount ÆÄÀϽýºÅÛ' ÇüÅ·ΠÇϸç, ¿ÏÀü Á¦°Å´Â 'zfs destroy'·Î ÇÑ´Ù. ÆÄÀϽýºÅÛÀÌ »ç¿ëÁßÀÌÁö ¾ÊÀ¸¸é ¹Ù·Î unmount¿Í Á¦°Å°¡ °¡´ÉÇÏ´Ù.

     
    # cd /data/log
    # zfs umount  data/log
    cannot unmount '/data/log': Device busy
    # cd /
    # zfs umount  data/log
    # zfs mount   data/log
    # zfs destroy data/log
     


    ½ºÅ丮Áö Ç® Àüü¸¦ Á¦°ÅÇÒ ¶§µµ ¸¶Âù°¡Áö·Î zpool destroy·Î ÇÏ¸é µÈ´Ù.

     
    # zpool list
    NAME                    SIZE    USED   AVAIL    CAP  HEALTH     ALTROOT
    data                   31.8G   10.9G   20.9G    34%  ONLINE     -
    # zpool destroy data
    cannot unmount '/backup': Device busy
    could not destroy 'data': could not unmount datasets
    # cd /
    # zpool destroy data
    # zpool list
    no pools available
     


    5. FreeBSD¿¡¼­´Â ZFS¸¦ ¼­ºñ½º¿¡ Àû¿ëÇÒ ¼ö ÀÖÀ»±î? (¼º´É ¹× ±âŸ »çÇ×)

    ZFS´Â ÃÖ¼Ò 1GBÀÌ»óÀÇ ¸Þ¸ð¸®¸¦ ±ÇÀåÇÑ´Ù. ±×·¯³ª ZFS´Â ½ÇÁ¦ ¸¹Àº ¸Þ¸ð¸®¸¦ »ç¿ëÇÏ´Â °æ¿ì°¡ ÀÖ´Ù. ÆÄÀϽýºÅÛ ¼º´É üũ¸¦ ÇÏ´Â µ¿¾È
    panic: kmem_malloc(16305): kmem_map too small: 332353536 total allocated °°Àº ¸Þ½ÃÁö¸¦ »Ñ¸®¸é¼­ ¸î ¹ø ´Ù¿îµÇ¾ú´Ù. i386 ȯ°æ¿¡¼­´Â kmem address space(vm.kmem_size_max)ÀÇ ÃÖ´ë°ªÀÌ 320MÀ¸·Î µÇ¾î ÀÖ´Ù. ±×·¯³ª ÀÌ ¼öÄ¡´Â ZFSÀ» »ç¿ëÇϱ⿡´Â ³·Àº ¼öÄ¡À̹ǷΠ±âº»°ªÀ» ±×´ë·Î »ç¿ëÇÒ °æ¿ì¿¡´Â Ä¿³Î ÆдÐÀÌ ¹ß»ýÇÒ ¼ö ÀÖ´Ù°í ÇÑ´Ù. ±×·¡¼­ ³ªµµ ´Ù¿îÀÌ µÈ °ÍÀ̾ú´Ù. vm.kmem_size´Â read only°ªÀ̹ǷΠ/boot/loader.conf ¿¡ ´ÙÀ½ 2ÁÙÀ» Ãß°¡ÇÑ´Ù. ±×¸®°í ºÎÆÃÀ» ÇÏ°í, ÇÊ¿ä½Ã ÀÌ ¼öÄ¡´Â ´õ ´Ã¸®¸é µÈ´Ù.

     
    vm.kmem_size="512M"
    vm.kmem_size_max="512M"
     


     
    [ ºÎÆà Àü ]
    # sysctl -a|grep kmem
    vm.kmem_size_scale: 3
    vm.kmem_size_max: 335544320
    vm.kmem_size_min: 0
    vm.kmem_size: 335544320

    [ ºÎÆà ÈÄ ]
    # sysctl -a|grep kmem
    vm.kmem_size_scale: 3
    vm.kmem_size_max: 536870912
    vm.kmem_size_min: 0
    vm.kmem_size: 536870912
     


    bonnie++·Î Sequential Output/Input/Create, Random, Random CreateÀÇ ¼º´É ºñ±³¸¦ Çß´Ù. ufs ÆÄÀϽýºÅÛ°ú ºñ±³ÇßÀ» ¶§ °¢ Ç׸ñº°·Î ´ë·« 2~5¹è ÀÌÇÏÀÇ ¸¸Á·½º·´Áö ¸øÇÑ ¼º´ÉÀÌ ³ª¿Ô´Ù. zfs ±âº» »ý¼º¿Ü¿¡ mirror·Î ÀÌ·ïÁø Ç®, raidz ·Î ÀÌ·ïÁø Ç®µµ ³·Àº ¼öÄ¡ÀÎ °ÍÀº ¸¶Âù°¡Áö¿´´Ù.

    ±×¸®°í, ºÎÆà ÈÄ ZFS¸¦ óÀ½ createÇÒ ¶§´Â ´ÙÀ½°ú °°Àº ¸Þ½ÃÁö°¡ ³ª¿Â´Ù.

     
    This module (opensolaris) contains code covered by the
    Common Development and Distribution License (CDDL)
    see http://opensolaris.org/os/licensing/opensolaris_license/
    WARNING: ZFS is considered to be an experimental feature in FreeBSD.
    ZFS filesystem version 6
    ZFS storage pool version 6
     


    'WARNING' ºÎºÐÀÌ º¸À̴°¡? FreeBSD¿¡¼­´Â ½ÇÇèÀûÀÎ »óÅÂÀÌ°í, ¼º´É ¶ÇÇÑ »ó´çÈ÷ ³·À¸´Ï, Æí¸®ÇÔ°ú À¯¿¬ÇÔÀ» ³ôÀÌ »ê´Ù°í ÇÏ´õ¶ó°í ¼­ºñ½º¿¡ Àû¿ëÇϱâ´Â ¹«¸®°¡ ÀÖ´Ù. ¾ÆÁ÷ FreeBSD¿¡¼­´Â Àç¹Õ°Ô Áñ±â¸é µÈ´Ù. Áñ±â´Ù º¸¸é ¹Ì·¡¿¡ Àû¿ëÇصµ ±¦ÂúÀ» ¶§°¡ ¿À°ÚÁö...

    6. Âü°í ÀÚ·á

    * ZFS ½ÃÀÛÇϱâ
      http://kr.sun.com/developers/solaris/techdocs/starting_zfs.html
    * ZFS Tuning Guide
      http://wiki.freebsd.org/ZFSTuningGuide
    * FreeBSD 7.1 ´Þ¶óÁø °Í ¸î°¡Áö (2009.1.20, ±Û ÁÁÀºÁøÈ£)
      http://coffeenix.net/bbs/viewtopic.php?t=3753
    * FreeBSD 7.0 »ç¿ë±â (2008.3.7, ±Û ÁÁÀºÁøÈ£, ZFS »ç¿ë±â ÀϺΠÆ÷ÇÔ)
      http://coffeenix.net/bbs/viewtopic.php?t=2892

      Ä¿ÇǴнº Ä«Æä ÃÖ±Ù ±Û
    [03/24] Youtube òÁ&#2
    [03/20] Re: ¿Â¶óÀΰÔÀÓÀÇ Á¾ÁÖ±¹ ´ëÇѹα¹
    [03/20] ½ÇÁ¦&#4
    [03/18] ±¹°¡&#5
    [10/20] Cross Compiler ±ò
    [07/14] SSL ¬¡¬°
    [04/26] Re: µµ½ºÈ­¸é ¿ø°ÝÁ¶Á¾ ¿©ºÎ
    [04/25] µµ½ºÈ­¸é ¿ø°ÝÁ¶Á¾ ¿©ºÎ
    [10/30] Cshell¿¡¼­ ³­¼ö ¼³Á¤
    [10/23] °øÇ×öµµÁÖ½Äȸ»ç SE ±¸ÀÎ Ëì
    [01/26] Re: wgetÀ¸·Î ´Ù¸¥¼­¹ö¿¡ÀÖ´Â µð·ºÅ丮¸¦ °¡Á®¿À·Á°íÇÕ´Ï´Ù.
    [01/25] wgetÀ¸·Î ´Ù¸¥¼­¹ö¿¡ÀÖ´Â µð·ºÅ丮¸¦ °¡Á®¿À·Á°íÇÕ´Ï´Ù.
    [01/11] ƯÁ¤ ¾Èµå·ÎÀ̵å WebView ¹öÀü¿¡¼­ SSL ¹®Á¦ (WebView ¹ö±×)
    [08/01] DNS forwarder (Àü´ÞÀÚ) ¼­¹ö¸¦ ÅëÇؼ­ Äõ¸®ÇÏ¸é ¿ª¹æÇâÀ» ¹Þ¾Æ¿ÀÁú ¸øÇÕ´Ï´Ù.
    [05/16] (ÁÖ)ÈÄÀÌÁî ½Ã½ºÅÛ¿£Áö´Ï¾î (°æ·ÂÀÚ) ¸ðÁý
      New!   ÃÖ±Ù¿¡ µî·ÏÇÑ ÆäÀÌÁö
      KiCad EDA Suite project (Free/Libre/Open-Source EDA Suite) (CAD)
      ¿ÀÇÂij½ºÄÉÀ̵å ijµå (OpenCASCADE CAD)
      QCad for Windows --- GNU GPL (Free Software)
      The Hello World Collection
      IPMI¸¦ È°¿ëÇÑ ¸®´ª½º ¼­¹ö°ü¸®
      DNS ¼³Á¤ °Ë»ç
      nagiosgraph ¼³Ä¡ ¹æ¹ý
      Slony-I ¼³Ä¡ ¹æ¹ý (postgresql replication tool)
      Qmail±â¹ÝÀÇ Anti spam ½Ã½ºÅÛ ±¸ÃàÇϱâ
      clusterssh

    [ ÇÔ²²ÇÏ´Â »çÀÌÆ® ]




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