computing:zfsreminders
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| computing:zfsreminders [2022/08/05 00:34] – oemb1905 | computing:zfsreminders [2024/04/21 23:12] (current) – oemb1905 | ||
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| + | * **zfsreminders** | ||
| + | * **Jonathan Haack** | ||
| + | * **Haack' | ||
| + | * **webmaster@haacksnetworking.org** | ||
| + | |||
| + | ------------------------------------------- | ||
| + | |||
| + | // | ||
| + | |||
| + | ------------------------------------------- | ||
| + | |||
| Create a pool on a single drive and specify a mountpoint for it. Note: use id, not uuid. | Create a pool on a single drive and specify a mountpoint for it. Note: use id, not uuid. | ||
| Line 35: | Line 47: | ||
| zfs mount pool/ | zfs mount pool/ | ||
| | | ||
| + | If you need to delete a dataset, do the following: | ||
| + | |||
| + | zfs destroy -r pool/ | ||
| + | | ||
| + | To create snapshots, here is a reasonable template: | ||
| + | |||
| + | DATE=`date +" | ||
| + | / | ||
| + | | ||
| + | To delete all snapshots and start over: | ||
| + | |||
| + | zfs list -H -o name -t snapshot | xargs -n1 zfs destroy | ||
| + | | ||
| + | To add a zfs cache or slog hard drive to your pool, do the following: | ||
| + | |||
| + | zpool add pool cache / | ||
| + | zpool add pool log / | ||
| + | |||
| + | To view current snapshots, do the following: | ||
| + | |||
| + | zfs list -r -t snapshot -o name, | ||
| + | zfs list -r -t snapshot -o name, | ||
| + | | ||
| + | To view pool space, including snapshots, do the following: | ||
| + | |||
| + | zfs list -ro space | ||
| + | | ||
| + | To replace a failed drive, power down the host, remove drive, reboot, get '' | ||
| + | |||
| + | sudo zpool replace pool < | ||
| + | sudo zpool replace pool 3347762980558930904 / | ||
| + | |||
| + | To check the health, statistics, and basic specs of your pool: | ||
| + | |||
| + | zpool status -v | ||
| + | zpool iostat -v | ||
| + | zpool list -v | ||
| + | | ||
| + | Also, to see whether cache volume is necessary, run and look at cache hit/miss ratio: | ||
| + | |||
| + | arc_summary | ||
| + | |||
| + | Change location of the keys for your encrypted datasets: | ||
| + | |||
| + | sudo zfs set keylocation=file:/// | ||
| + | | ||
| + | Send and receive entire pool to new pool | ||
| + | |||
| + | zfs snapshot -r pool1@latestsnap | ||
| + | zfs send -R pool1@latestsnap | zfs receive -F pool2 | ||
| + | | ||
| + | Arc information | ||
| + | | ||
| + | arcstat | ||
| + | arc_summary -d | less | ||
| + | nano / | ||
| + | <# 8GB example - 8*(2^30) = below> | ||
| + | <# | ||
| + | <# Set Max ARC size => 2GB == 2147483648 Bytes> | ||
| + | <options zfs zfs_arc_max=2147483648> | ||
| + | <# Set Min ARC size => 1GB == 1073741824> | ||
| + | <options zfs zfs_arc_min=1073741824> | ||
| + | cat / | ||
| + | cat / | ||
| + | |||
| + | More examples ... | ||
| + | --- // | ||
computing/zfsreminders.1659659663.txt.gz · Last modified: 2022/08/05 00:34 by oemb1905
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