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Diffstat (limited to 'topics/octopus/lizardfs/README.gmi')
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diff --git a/topics/octopus/lizardfs/README.gmi b/topics/octopus/lizardfs/README.gmi index 7c91136..b52c03e 100644 --- a/topics/octopus/lizardfs/README.gmi +++ b/topics/octopus/lizardfs/README.gmi @@ -83,6 +83,41 @@ lizardfs-admin list-disks octopus01 9421 | less Other commands can be found with `man lizardfs-admin`. +## Info + +``` +lizardfs-admin info octopus01 9421 +LizardFS v3.12.0 +Memory usage: 2.5GiB +Total space: 250TiB Available space: 10TiB +Trash space: 510GiB +Trash files: 188 +Reserved space: 21GiB Reserved files: 18 +FS objects: 7369883 +Directories: 378782 +Files: 6858803 +Chunks: 9100088 +Chunk copies: 20017964 +Regular copies (deprecated): 20017964 +``` + +``` +lizardfs-admin chunks-health octopus01 9421 +Chunks availability state: + Goal Safe Unsafe Lost + slow 1323220 1 - + fast 6398524 - 5 + +Chunks replication state: + Goal 0 1 2 3 4 5 6 7 8 9 10+ + slow - 218663 1104558 - - - - - - - - + fast 6398524 - 5 - - - - - - - - + +Chunks deletion state: + Goal 0 1 2 3 4 5 6 7 8 9 10+ + slow - 104855 554911 203583 76228 39425 19348 8659 3276 20077 292859 + fast 6380439 18060 30 - - - - - - - - +``` ## Deleted files @@ -188,3 +223,54 @@ KeyringMode=inherit [Install] WantedBy=multi-user.target ``` + +# To deplete and remove a drive in LizardFS + +**1. Mark the chunkserver (or specific disk) for removal** + +Edit the chunkserver's disk configuration file (typically `/etc/lizardfs/mfshdd.cfg`) and prefix the drive path with an asterisk: + +``` +*/mnt/disk_to_remove +``` + +Restart the chunkserver process on the node + +```bash +systemctl stop lizardfs-chunkserver +systemctl start lizardfs-chunkserver +``` + +**3. Monitor the evacuation progress** + +The master will begin migrating chunks off the marked drive. You can monitor progress with: + +```bash +lizardfs-admin list-disks octopus01 9421 +lizardfs-admin list-disks octopus01 9421|grep 172.23.19.59 -A 7 +172.23.19.59:9422:/mnt/sdc/lizardfs_vol/ + to delete: yes + damaged: no + scanning: no + last error: no errors + total space: 3.6TiB + used space: 3.4TiB + chunks: 277k +``` + +Look for the disk showing evacuation status. The "to delete" chunks count should decrease over time as data is replicated elsewhere. + +You can also check the CGI web interface if you have it running—it shows disk status and chunk counts. + +**4. Remove the drive once empty** + +Once all chunks have been evacuated (the disk shows 0 chunks or is marked as empty), you can safely: + +1. Remove the line from `mfshdd.cfg` entirely +2. Reload the configuration again +3. Physically remove or repurpose the drive + +**Important notes:** +- Ensure you have enough free space on other disks to absorb the migrating chunks +- The evacuation time depends on the amount of data and network/disk speed +- Don't forcibly remove a drive before evacuation completes, or you risk data loss if replication goals aren't met |