LVM: Shrink & extend a filesystem/volume
Article Number: 210 | Rating: Unrated | Last Updated: Sun, Jun 3, 2018 10:11 AM
LVM: Shrink & extend a filesystem/volume
|
# Tested on AIX 5.3
# Otherwise, we can specify the final size like this:# Note: jfs2 allows to shrink the filesystem, but a jfs filesystem's size cannot be reduced # In this example we are reducing /local/opt in order to free some space to be # assigned to "/" afterwards # First we've verified that there was no free space lsvg rootvg VOLUME GROUP: rootvg VG IDENTIFIER: 00c8425d00004c000000011f18c09ed8 VG STATE: active PP SIZE: 32 megabyte(s) VG PERMISSION: read/write TOTAL PPs: 1406 (44992 megabytes) MAX LVs: 256 FREE PPs: 2 (64 megabytes) <--- !!! LVs: 13 USED PPs: 1404 (44928 megabytes) OPEN LVs: 12 QUORUM: 1 (Disabled) TOTAL PVs: 2 VG DESCRIPTORS: 3 STALE PVs: 0 STALE PPs: 0 ACTIVE PVs: 2 AUTO ON: yes MAX PPs per VG: 32512 MAX PPs per PV: 1016 MAX PVs: 32 LTG size (Dynamic): 256 kilobyte(s) AUTO SYNC: no HOT SPARE: no BB POLICY: relocatable # Check if we are able to reduce /local/opt. Verify filesystem type lsvg -l rootvg rootvg: LV NAME TYPE LPs PPs PVs LV STATE MOUNT POINT hd5 boot 1 2 2 closed/syncd N/A hd6 paging 136 272 2 open/syncd N/A hd8 jfs2log 1 2 2 open/syncd N/A hd4 jfs2 18 36 2 open/syncd / hd2 jfs2 47 94 2 open/syncd /usr hd9var jfs2 32 64 2 open/syncd /var hd3 jfs2 32 64 2 open/syncd /tmp hd1 jfs2 1 2 2 open/syncd /local/home hd10opt jfs2 2 4 2 open/syncd /opt localoptlv jfs2 128 256 2 open/syncd /local/opt <-- jfs2, ok lv_dump2 sysdump 32 32 1 open/syncd N/A lv_dump1 sysdump 32 32 1 open/syncd N/A lv_u01 jfs2 256 512 2 open/syncd /u01 # Shrink F.S./volume # ------------------------------------------------------------------------------------------ df -m Filesystem MB blocks Free %Used Iused %Iused Mounted on /dev/hd4 64.00 2.99 96% 2783 77% / /dev/hd2 1504.00 119.41 93% 36283 53% /usr /dev/hd9var 1024.00 225.42 78% 562 2% /var /dev/hd3 1024.00 961.14 7% 1818 1% /tmp /dev/hd1 32.00 9.35 71% 545 20% /local/home /proc - - - - - /proc /dev/hd10opt 64.00 14.73 77% 1421 28% /opt /dev/localoptlv 5120.00 4819.80 6% 2776 1% /local/opt <--- /dev/lv_u01 8192.00 602.68 93% 40483 20% /u01 /dev/lv_u02 81920.00 59775.86 28% 54 1% /u02 /dev/lv_u03 81920.00 50331.45 39% 56 1% /u03 /dev/lv_u04 81920.00 63376.46 23% 42 1% /u04 /dev/lv_u07 104448.00 101208.13 4% 340 1% /u07 /dev/lv_u05 12288.00 2768.47 78% 89 1% /u05 /dev/lv_u06 12288.00 2768.46 78% 89 1% /u06 # Let's reduce by 1GB chfs -a size=-1G /local/opt Filesystem size changed to 8388608 # chfs -a size=7G /local/opt # chfs -a size=7168M /local/opt
df -m Filesystem MB blocks Free %Used Iused %Iused Mounted on /dev/hd4 64.00 2.99 96% 2783 77% / /dev/hd2 1504.00 119.41 93% 36283 53% /usr /dev/hd9var 1024.00 225.42 78% 562 2% /var /dev/hd3 1024.00 961.14 7% 1818 1% /tmp /dev/hd1 32.00 9.35 71% 545 20% /local/home /proc - - - - - /proc /dev/hd10opt 64.00 14.73 77% 1421 28% /opt /dev/localoptlv 4096.00 3795.95 8% 2776 1% /local/opt <--- /dev/lv_u01 8192.00 603.16 93% 40467 20% /u01 /dev/lv_u02 81920.00 59775.86 28% 54 1% /u02 /dev/lv_u03 81920.00 50331.45 39% 56 1% /u03 /dev/lv_u04 81920.00 63376.46 23% 42 1% /u04 /dev/lv_u07 104448.00 101208.13 4% 340 1% /u07 /dev/lv_u05 12288.00 2768.47 78% 89 1% /u05 /dev/lv_u06 12288.00 2768.46 78% 89 1% /u06 # Check new free space on volume group lsvg rootvg VOLUME GROUP: rootvg VG IDENTIFIER: 00c8425d00004c000000011f18c09ed8 VG STATE: active PP SIZE: 32 megabyte(s) VG PERMISSION: read/write TOTAL PPs: 1406 (44992 megabytes) MAX LVs: 256 FREE PPs: 66 (2112 megabytes) LVs: 13 USED PPs: 1340 (42880 megabytes) OPEN LVs: 12 QUORUM: 1 (Disabled) TOTAL PVs: 2 VG DESCRIPTORS: 3 STALE PVs: 0 STALE PPs: 0 ACTIVE PVs: 2 AUTO ON: yes MAX PPs per VG: 32512 MAX PPs per PV: 1016 MAX PVs: 32 LTG size (Dynamic): 256 kilobyte(s) AUTO SYNC: no HOT SPARE: no BB POLICY: relocatable # Extend F.S./volume # ------------------------------------------------------------------------------------------ df -m Filesystem MB blocks Free %Used Iused %Iused Mounted on /dev/hd4 64.00 2.98 96% 2783 77% / <--- /dev/hd2 1504.00 384.37 75% 36279 29% /usr /dev/hd9var 1024.00 225.42 78% 562 2% /var /dev/hd3 1024.00 961.14 7% 1818 1% /tmp /dev/hd1 32.00 9.35 71% 545 20% /local/home /proc - - - - - /proc /dev/hd10opt 64.00 14.73 77% 1421 28% /opt /dev/localoptlv 4096.00 3795.95 8% 2776 1% /local/opt /dev/lv_u01 8192.00 602.98 93% 40496 20% /u01 /dev/lv_u02 81920.00 59775.86 28% 54 1% /u02 /dev/lv_u03 81920.00 50331.45 39% 56 1% /u03 /dev/lv_u04 81920.00 63376.46 23% 42 1% /u04 /dev/lv_u07 104448.00 101208.13 4% 340 1% /u07 /dev/lv_u05 12288.00 2768.47 78% 89 1% /u05 /dev/lv_u06 12288.00 2768.46 78% 89 1% /u06 # Let's extend by 512M chfs -a size=+512M / Filesystem size changed to 1179648 # Otherwise, we can specify the final size like this: # chfs -a size=1152M / # chfs -a size=2G / df -m Filesystem MB blocks Free %Used Iused %Iused Mounted on /dev/hd4 576.00 514.91 11% 2783 3% / <--- /dev/hd2 1504.00 384.37 75% 36279 29% /usr /dev/hd9var 1024.00 225.42 78% 562 2% /var /dev/hd3 1024.00 961.14 7% 1818 1% /tmp /dev/hd1 32.00 9.35 71% 545 20% /local/home /proc - - - - - /proc /dev/hd10opt 64.00 14.73 77% 1421 28% /opt /dev/localoptlv 4096.00 3795.95 8% 2776 1% /local/opt /dev/lv_u01 8192.00 602.82 93% 40520 20% /u01 /dev/lv_u02 81920.00 59775.86 28% 54 1% /u02 /dev/lv_u03 81920.00 50331.45 39% 56 1% /u03 /dev/lv_u04 81920.00 63376.46 23% 42 1% /u04 /dev/lv_u07 104448.00 101208.13 4% 340 1% /u07 /dev/lv_u05 12288.00 2768.47 78% 89 1% /u05 /dev/lv_u06 12288.00 2768.46 78% 89 1% /u06 lsvg rootvg VOLUME GROUP: rootvg VG IDENTIFIER: 00c8425d00004c000000011f18c09ed8 VG STATE: active PP SIZE: 32 megabyte(s) VG PERMISSION: read/write TOTAL PPs: 1406 (44992 megabytes) MAX LVs: 256 FREE PPs: 34 (1088 megabytes) LVs: 13 USED PPs: 1372 (43904 megabytes) OPEN LVs: 12 QUORUM: 1 (Disabled) TOTAL PVs: 2 VG DESCRIPTORS: 3 STALE PVs: 0 STALE PPs: 0 ACTIVE PVs: 2 AUTO ON: yes MAX PPs per VG: 32512 MAX PPs per PV: 1016 MAX PVs: 32 LTG size (Dynamic): 256 kilobyte(s) AUTO SYNC: no HOT SPARE: no BB POLICY: relocatable |
Subscribe to Article
Print Article
Email Article to Friend
Export to PDF
Export to MS Word