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xfs文件系统lvm缩小空间操作(/home从100G减小到80G)
[root@xifenfei ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/rhel-root 449G 6.0G 443G 2% / devtmpfs 63G 0 63G 0% /dev tmpfs 63G 0 63G 0% /dev/shm tmpfs 63G 20M 63G 1% /run tmpfs 63G 0 63G 0% /sys/fs/cgroup /dev/mapper/rhel-home 100G 38M 100G 1% /home /dev/sda2 1014M 165M 850M 17% /boot /dev/sda1 200M 9.8M 191M 5% /boot/efi tmpfs 13G 4.0K 13G 1% /run/user/42 tmpfs 13G 32K 13G 1% /run/user/0 /dev/sr0 4.2G 4.2G 0 100% /media [root@xifenfei u01]# xfsdump -f /home.xfsdump /home xfsdump: using file dump (drive_simple) strategy xfsdump: version 3.1.7 (dump format 3.0) - type ^C for status and control ============================= dump label dialog ============================== please enter label for this dump session (timeout in 300 sec) -> home session label entered: "tar czvf /home.tar.gz /home home" --------------------------------- end dialog --------------------------------- xfsdump: level 0 dump of xifenfei:/home xfsdump: dump date: Fri Jun 25 11:37:13 2021 xfsdump: session id: 4d75008e-9927-417d-9722-52d13bb89eb0 xfsdump: session label: xfsdump: ino map phase 1: constructing initial dump list xfsdump: ino map phase 2: skipping (no pruning necessary) xfsdump: ino map phase 3: skipping (only one dump stream) xfsdump: ino map construction complete xfsdump: estimated dump size: 4828224 bytes xfsdump: /var/lib/xfsdump/inventory created ============================= media label dialog ============================= please enter label for media in drive 0 (timeout in 300 sec) -> home media label entered: "home" --------------------------------- end dialog --------------------------------- xfsdump: creating dump session media file 0 (media 0, file 0) xfsdump: dumping ino map xfsdump: dumping directories xfsdump: dumping non-directory files xfsdump: ending media file xfsdump: media file size 4732672 bytes xfsdump: dump size (non-dir files) : 4588480 bytes xfsdump: dump complete: 4 seconds elapsed xfsdump: Dump Summary: xfsdump: stream 0 /home.xfsdump OK (success) xfsdump: Dump Status: SUCCESS [root@xifenfei u01]# umount /home [root@xifenfei u01]# lvreduce -L 80G /dev/mapper/rhel-home WARNING: Reducing active logical volume to 80.00 GiB. THIS MAY DESTROY YOUR DATA (filesystem etc.) Do you really want to reduce rhel/home? [y/n]: y Size of logical volume rhel/home changed from 100.00 GiB (25600 extents) to 80.00 GiB (20480 extents). Logical volume rhel/home successfully resized. [root@xifenfei u01]# mkfs.xfs -f /dev/mapper/rhel-home meta-data=/dev/mapper/rhel-home isize=512 agcount=16, agsize=1310720 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=0, sparse=0 data = bsize=4096 blocks=20971520, imaxpct=25 = sunit=64 swidth=64 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =internal log bsize=4096 blocks=10240, version=2 = sectsz=512 sunit=64 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 [root@xifenfei u01]# mount /home xfsrestore -f /home.xfsdump /home [root@xifenfei u01]# xfsrestore -f /home.xfsdump /home xfsrestore: using file dump (drive_simple) strategy xfsrestore: version 3.1.7 (dump format 3.0) - type ^C for status and control xfsrestore: searching media for dump xfsrestore: examining media file 0 xfsrestore: dump description: xfsrestore: hostname: xifenfei xfsrestore: mount point: /home xfsrestore: volume: /dev/mapper/rhel-home xfsrestore: session time: Fri Jun 25 11:37:13 2021 xfsrestore: level: 0 xfsrestore: session label: "tar czvf /home.tar.gz /home home" xfsrestore: media label: "home" xfsrestore: file system id: b996cff9-332b-4c07-96e1-8335a1f23627 xfsrestore: session id: 4d75008e-9927-417d-9722-52d13bb89eb0 xfsrestore: media id: 6094b9b5-a45f-4638-a0e2-c1b982ead67b xfsrestore: using online session inventory xfsrestore: searching media for directory dump xfsrestore: reading directories xfsrestore: 119 directories and 188 entries processed xfsrestore: directory post-processing xfsrestore: restoring non-directory files xfsrestore: restore complete: 0 seconds elapsed xfsrestore: Restore Summary: xfsrestore: stream 0 /home.xfsdump OK (success) xfsrestore: Restore Status: SUCCESS [root@xifenfei u01]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/rhel-root 449G 14G 435G 4% / devtmpfs 63G 0 63G 0% /dev tmpfs 63G 20M 63G 1% /run tmpfs 63G 0 63G 0% /sys/fs/cgroup /dev/sda2 1014M 165M 850M 17% /boot /dev/sda1 200M 9.8M 191M 5% /boot/efi tmpfs 13G 4.0K 13G 1% /run/user/42 tmpfs 13G 28K 13G 1% /run/user/0 /dev/sr0 4.2G 4.2G 0 100% /media tmpfs 63G 0 63G 0% /dev/shm /dev/mapper/rhel-home 80G 38M 80G 1% /home
xfs系统的lvm无法直接缩小空间,只能是通过xfsdump /home内容,然后lvm缩小空间重做xfs文件系统,再使用xfsdump还原
lvm扩容swap空间(swap从8G扩大到16G)
[root@xifenfei home]# free -m total used free shared buff/cache available Mem: 128355 86907 26110 274 15338 37632 Swap: 8192 0 8192 [root@xifenfei home]# lvextend -L 16GB /dev/rhel/swap Size of logical volume rhel/swap changed from 8.00 GiB (2048 extents) to 16.00 GiB (4096 extents). Logical volume rhel/swap successfully resized. [root@xifenfei home]# sync;sync [root@xifenfei home]# swapoff /dev/rhel/swap mkswap /dev/rhel/swap [root@xifenfei home]# mkswap /dev/rhel/swap mkswap: /dev/rhel/swap: warning: wiping old swap signature. swapon /dev/rhel/swap Setting up swapspace version 1, size = 16777212 KiB no label, UUID=8d79ccf4-1796-49c9-968d-23abb67bc6eb [root@xifenfei home]# swapon /dev/rhel/swap [root@xifenfei home]# free -m total used free shared buff/cache available Mem: 128355 86907 26110 274 15338 37632 Swap: 16383 0 16383