¿©·¯ºÐ¿¡°Ô °ÌÀ» ÁÖ±â À§Çؼ°¡ ¾Æ´Ï¶ó, LVMÀº ¿©·¯ºÐÀÇ ÆÄÀÏ ½Ã½ºÅÛÀ» À§ÇèÇÏ°Ô ÇÏÁö ¾Êµµ·Ï Çϱâ À§ÇÑ ¿ë¾î¿¡¼ ¿Ô´Ù.
´Ù¼Ò, ¹Ø¹Ù´Ú ºÎÅÍ ½ÃÀÛÇÏÀÚ.
¿ì¸®°¡ ´Ü¼øÈ÷ ÇÏµå µð½ºÅ©³ª ÆÄƼ¼ÇÀ» °¡Á¤ÇÏ¿´´Ù ÇÒÁö¶óµµ, ¿©·¯ºÐÀº ¾î¸² Àâ¾Æ¼ '¹°¸®Àû' À̶ó´Â ¸»À» ÀÌÇØÇØ¾ß ÇÑ´Ù. ¿¹¸¦ µé¾î, /dev/hda, /dev/hda6, /dev/sda. ¿©·¯ºÐÀº ºí·° ÀåÄ¡ÀÇ ¿¬¼ÓÀûÀÎ ºí·° ¼öµéÀ» ¹Ù²Ü¼ö ÀÖ´Ù.
PV´Â ´ÜÁö ¿©±â¿¡ Ãß°¡µÈ °ü¸® µ¥ÀÌŸ¸¦ °¡Áö´Â ¹°¸®Àû ¹Ìµð¾îÀÌ´Ù. -- ÀÏ´Ü ¿©±â¿¡ Ãß°¡Çϸé, LVMÀº À̰ÍÀ» ¼ÒÀ¯ÇÑ °Íó·³ ÀνÄÇÑ´Ù.
¹°¸®Àû È®Àå(Physical Extents)Àº ¸Þ°¡ ¹ÙÀÌÆ® Å©±â¸¦ °¡Áö´Â Å« ºí·°°°Àº °ÍÀÌ´Ù. PEs´Â ÇÒ´çµÉ ¼ö ÀÖ´Ù.
VG´Â ¹°¸®Àû È®ÀåÀÇ ¼ö(¿©·¯ ¹°¸®Àû º¼·ýÀ̳ª ÇÏµå µå¶óÀ̺갡 ±âº»ÀÎ)·Î ÀÌ·ç¾î Áø´Ù. À̰ÍÀ» ¿©·¯ ÇÏµå µå¶óÀ̺ê(¿¹¸¦ µé¾î, /dev/hda ¿Í /dev/sda)·Î ÀÌ·ç¾îÁ® ÀÖ´Â °Í °°Àº VG·Î »ý°¢ÇÒ¼ö ÀÖÁö¸¸, À̰ÍÀº À̵é ÇÏµå µå¶óÀ̺갡 Á¦°øÇÏ´Â PEµéÀ» Æ÷ÇÔÇÑ´Ù°í ¸»ÇÏ´Â °ÍÀÌ ´õ Á¤È®ÇÏ´Ù.
>From this Volume Group, PEs can be assigned to a ...
¿ì¸®´Â ¸¶Áö¸·À¸·Î °®´Â °ÍÀÌ ÀÖ´Ù. ³í¸®Àû º¼·ýÀº ¸ðµç ÀÛ¾÷ÀÇ °á°úÀÌ¸ç ¿ì¸®´Â Á¤º¸¸¦ ¿©±â¿¡ ÀúÀåÇÑ´Ù. À̰ÍÀº ÆÄƼ¼Ç¿¡ ´ëÇÑ »ý°¢°ú µ¿ÀÏÇÑ °ÍÀÌ´Ù.
Á¤±Ô ÆÄƼ¼Çó·³, ³í¸®Àû º¼·ýÀº ÀüÇüÀûÀ¸·Î ¸¸µé¾î Áø´Ù.
ÀÌ ÆÄÀÏ ½Ã½ºÅÛÀº ¿©·¯ºÐÀÌ ¿øÇÏ´Â ¸ðµç °ÍÀÌ´Ù.: Ç¥ÁØ ext2, ReiserFS, NWFS, XFS, JFX, NTFS µîµî. ¸®´ª½º Ä¿³Î¿¡¼, Á¤±Ô ÆÄƼ¼Ç°ú ³í¸®Àû º¼·ý»çÀÌ¿¡´Â ¾Æ¹«·± Â÷À̰¡ ¾ø´Ù.
³ª´Â ¿©·¯ºÐÀÌ ½±°Ô À̰ÍÀ» º¼¼ö ÀÖµµ·Ï Çϱâ À§ÇØ ASCII ÃÆ®·Î ¸¸µé¾ú´Ù.
¹°¸®Àû È®ÀåÀ» Æ÷ÇÔÇÑ, ¹°¸®Àû º¼·ý: +-----[ Physical Volume ]------+ | PE | PE | PE | PE | PE | PE | +------------------------------+ 6°³ÀÇ ¹°¸®Àû È®Àå°ú 2°³ÀÇ ¹°¸®Àû º¼·ý(PVs)¸¦ Æ÷ÇÔÇÑ º¼·ý ±×·ì: +------[ Volume Group ]-----------------+ | +--[PV]--------+ +--[PV]---------+ | | | PE | PE | PE | | PE | PE | PE | | | +--------------+ +---------------+ | +---------------------------------------+ ¿ì¸®´Â ¿©±â¿¡ ´õ Ãß°¡ È®ÀåÀ» ÇÏ¿´´Ù.: +------[ Volume Group ]-----------------+ | +--[PV]--------+ +--[PV]---------+ | | | PE | PE | PE | | PE | PE | PE | | | +--+---+---+---+ +-+----+----+---+ | | | | | +-----/ | | | | | | | | | | | | +-+---+---+-+ +----+----+--+ | | | Logical | | Logical | | | | Volume | | Volume | | | | | | | | | | /home | | /var | | | +-----------+ +------------+ | +---------------------------------------+ |
À̰ÍÀº µÎ µð½ºÅ©¿¡ °ÉÄ£ µÎ ÆÄÀÏ ½Ã½ºÅÛÀ» ¿ì¸®¿¡°Ô º¸¿©ÁØ´Ù. /home ÆÄÀÏ ½Ã½ºÅÛÀº 4°³ÀÇ ¹°¸®Àû È®ÀåÀ», /var ÆÄÀÏ ½Ã½ºÅÛÀº 2°³ÀÇ ¹°¸®Àû È®ÀåÀ» Æ÷ÇÔÇÑ´Ù.
bert hubert´Â ´õ¿í ½Ã°¢ÀûÀ¸·Î LVMÀ» º¸¿©ÁÖ±â À§ÇØ Åø À» ¸¸µé¾ú´Ù. screenshotµµ ÀÖ´Ù. ASCII Â÷Æ®º¸´Ù ´õ ÁÁ°Ô º¸ÀδÙ.
ÀÌ ºÎºÐÀº ÀÌÇØÇÏ±â ¾î·Æ´Ù. ±×·¡¼ ³í¸®Àû º¼·ýÀ» ¸¸µå´Â ¿¹Á¦¿¡ ÁÖ¼®À» ´Þ¾Ò´Ù. ÀÌ ¿¹Á¦¸¦ Äֿܼ¡ º¹»çÇÏÁö ¸¶¶ó. ¿Ö³ÄÇÏ¸é ¸¸ÀÏ ¿©·¯ºÐÀÇ ÄÄÇ»ÅͰ¡ /dev/hda3¿Í /dev/hdb2¸¦ »ç¿ëÇÏÁö ¾Ê´Â´Ù¸é, ¿©·¯ºÐÀÇ µ¥ÀÌŸ¸¦ ÆÄ±«Çϱ⠶§¹®ÀÌ´Ù.
Àǹ®½º·´´Ù¸é, À§ÀÇ ASCIIgramÀ» ºÁ¶ó.
¿©·¯ºÐÀº /dev/hda3¿Í /dev/hdb2 ÆÄƼ¼Ç ŸÀÔÀ» 0x8e, Áï 'Linux LVM'À¸·Î ¼³Á¤ÇØ¾ß ÇÑ´Ù. fdiskÀÇ ¹öÀüÀÌ ÀÌ Å¸ÀÔÀ» ¾ÆÁ÷ ¾ËÁö ¸øÇØ 'Unknown'À¸·Î ³ª¿À´ÂÁö È®ÀÎÇØ¶ó.:
# fdisk /dev/hda Command (m for help): p Disk /dev/hda: 255 heads, 63 sectors, 623 cylinders Units = cylinders of 16065 * 512 bytes Device Boot Start End Blocks Id System /dev/hda1 1 2 16033+ 83 Linux /dev/hda2 3 600 4803435 83 Linux /dev/hda3 601 607 56227+ 83 Linux /dev/hda4 608 614 56227+ 83 Linux Command (m for help): t Partition number (1-4): 3 Hex code (type L to list codes): 8e Command (m for help): p Disk /dev/hda: 255 heads, 63 sectors, 623 cylinders Units = cylinders of 16065 * 512 bytes Device Boot Start End Blocks Id System /dev/hda1 1 2 16033+ 83 Linux /dev/hda2 3 600 4803435 83 Linux /dev/hda3 601 607 56227+ 8e Unknown /dev/hda4 608 614 56227+ 83 Linux Command (m for help): w |
¿ì¸®´Â /dev/hdb2µµ ÇßÁö¸¸, ¿©±â¼´Â º¸¿©ÁÖÁö ¾Ê¾Ò´Ù. À̰ÍÀº LVMÀÌ ¿©·¯ºÐÀÇ ¼³Á¤À» ÀÒÀº °ÍµéÀ» À籸¼ºÇϱâ À§ÇØ ÇÊ¿äÇÏ´Ù.
Áö±Ý, À̰ÍÀÌ ÇÊ¿äÇÏÁö´Â ¾ÊÁö¸¸, ¸î¸î ÄÄÇ»ÅÍ´Â ¿©±â¼ ÀçºÎÆÃÀ» ¿ä±¸Çϱ⵵ ÇÑ´Ù. ±×·¡¼ ¸¸ÀÏ ´ÙÀ½ ¿¹Á¦°¡ Á¦´ë·Î ÀÛµ¿ÇÏÁö ¾Ê´Â´Ù¸é, Àç ºÎÆÃÇØ¶ó.
±×¸®°í, ¿ì¸®´Â ´ÙÀ½Ã³·³ ¹°¸®Àû º¼·ýÀ» ¸¸µç´Ù.:
# pvcreate /dev/hda3 pvcreate -- physical volume "/dev/hda3" successfully created # pvcreate /dev/hdb2 pvcreate -- physical volume "/dev/hdb2" successfully created |
±×¸®°í, ¿ì¸®´Â ÀÌµé µÎ°³ÀÇ PVs¸¦ 'test'¶ó ºÒ¸®´Â º¼·ý ±×·ì¿¡ Ãß°¡ÇÑ´Ù:
# vgcreate test /dev/hdb2 /dev/hda3 vgcreate -- INFO: using default physical extent size 4 MB vgcreate -- INFO: maximum logical volume size is 255.99 Gigabyte vgcreate -- doing automatic backup of volume group "test" vgcreate -- volume group "test" successfully created and activated |
±×·¡¼, ¿ì¸®´Â ºó º¼·ý ±×·ìÀ» °¡Áö°Ô µÇ¸ç, ÀÌÁ¦ ºñÆ®(bit)¸¦ °Ë»çÇϵµ·Ï ÇÏÀÚ.
# vgdisplay -v test --- Volume group --- VG Name test VG Access read/write VG Status available/resizable VG # 0 MAX LV 256 Cur LV 0 Open LV 0 MAX LV Size 255.99 GB Max PV 256 Cur PV 2 Act PV 2 VG Size 184 MB PE Size 4 MB Total PE 46 Alloc PE / Size 0 / 0 Free PE / Size 46 / 184 MB --- No logical volumes defined in test --- --- Physical volumes --- PV Name (#) /dev/hda3 (2) PV Status available / allocatable Total PE / Free PE 13 / 13 PV Name (#) /dev/hdb2 (1) PV Status available / allocatable Total PE / Free PE 33 / 33 |
# lvcreate -L 50M -n HOWTO test lvcreate -- rounding up size to physical extent boundary "52 MB" lvcreate -- doing automatic backup of "test" lvcreate -- logical volume "/dev/test/HOWTO" successfully created |
ÀÚ, ¿©±â¼ ÆÄÀÏ ½Ã½ºÅÛÀ» ¸¸µéµµ·Ï ÇÏÀÚ.
# mke2fs /dev/test/HOWTO mke2fs 1.18, 11-Nov-1999 for EXT2 FS 0.5b, 95/08/09 Filesystem label= OS type: Linux Block size=1024 (log=0) Fragment size=1024 (log=0) 13328 inodes, 53248 blocks 2662 blocks (5.00%) reserved for the super user First data block=1 7 block groups 8192 blocks per group, 8192 fragments per group 1904 inodes per group Superblock backups stored on blocks: 8193, 24577, 40961 Writing inode tables: done Writing superblocks and filesystem accounting information: done # mount /dev/test/HOWTO /mnt # ls /mnt lost+found |
´Ù Çß´Ù. ÀÌÁ¦ º¼·ý ±×·ìÀ» ´Ù½Ã º¸µµ·Ï ÇØ¶ó. ¿Ö³ÄÇϸé, Áö±ÝÂë ºñÆ®(bit)°¡ ä¿öÁ®¾ß Çϱ⠶§¹®ÀÌ´Ù.
# vgdisplay test -v --- Volume group --- VG Name test VG Access read/write VG Status available/resizable VG # 0 MAX LV 256 Cur LV 1 Open LV 1 MAX LV Size 255.99 GB Max PV 256 Cur PV 2 Act PV 2 VG Size 184 MB PE Size 4 MB Total PE 46 Alloc PE / Size 13 / 52 MB Free PE / Size 33 / 132 MB --- Logical volume --- LV Name /dev/test/HOWTO VG Name test LV Write Access read/write LV Status available LV # 1 # open 1 LV Size 52 MB Current LE 13 Allocated LE 13 Allocation next free Read ahead sectors 120 Block device 58:0 --- Physical volumes --- PV Name (#) /dev/hda3 (2) PV Status available / allocatable Total PE / Free PE 13 / 13 PV Name (#) /dev/hdb2 (1) PV Status available / allocatable Total PE / Free PE 33 / 20 |
ÀÚ, µÆ´Ù. /dev/hda3´Â ¿ÏÀüÈ÷ »ç¿ëµÇÁö´Â ¾Ê¾ÒÁö¸¸, /dev/hdb2´Â 13°³ÀÇ ¹°¸®Àû È®ÀåÀ» »ç¿ëÇϰí ÀÖ´Ù.
¸ðµç ¿î¿µÃ¼Á¦Ã³·³, Linuxµµ µÎ ºÎºÐÀ¸·Î ³ª´©¾îÁ® ÀÖ´Ù.:Ä¿³Î ¿µ¿ª°ú À¯Àú ¿µ¿ª. À¯Àú ¿µ¿ªÀº °¡²û userland¶ó ºÒ¸®¸ç, À̰ÍÀº 'Userland'¸¦ À§ÇÑ ÁÁÀº À̸§À̱⵵ ÇÏ´Ù.
³í¸®Àû º¼·ý °ü¸®¸¦ Æ÷ÇÔÇÏ´Â º¹±¸, »ý¼º°ú ¼öÁ¤°ú °°Àº °ÍµéÀº À¯Àú ¿µ¿ª¿¡¼ ÇàÇØ Áö¸ç, ±×¸®°í Ä¿³Î°ú Åë½ÅÇÑ´Ù. ÀÏ´Ü º¼·ý ±×·ì°ú ³í¸®ÀûÀÎ º¼·ýÀÌ Ä¿³Î¿¡ º¸°íµÇ¸é, 'Ȱ¼ºÈ'¶ó ºÒ¸°´Ù. ¾î¶² º¯ÈµéÀº ¿£ÅÍÆ¼(entity)°¡ Ȱ¼ºÈµÉ¶§¸¸ ÀÌ·ç¾îÁö¸ç, ¾î¶² °ÍµéÀº ºñ Ȱ¼ºÈµÇ¾úÀ»¶§ ÀÌ·ç¾îÁø´Ù.