zfs commands

Change zfs io threads

echo 24> /sys/module/zfs/parameters/zfs_vdev_async_read_max_active  
echo 24 > /sys/module/zfs/parameters/zfs_vdev_async_write_max_active 
echo 8 > /sys/module/zfs/parameters/zfs_vdev_removal_max_active 
echo 24 > /sys/module/zfs/parameters/zfs_vdev_sync_read_max_active 
echo 24 > /sys/module/zfs/parameters/zfs_vdev_sync_write_max_active

Create snapshot

zfs snapshot zdata/pc-backup@`date "+%Y%m%d-%H%M"`

Show list

zfs list -o name,used,available,compressratio,compression,mountpoint,recordsize,atime,primarycache,secondarycache

Show snapshot list

zfs list -o name,used,available,compressratio,compression,mountpoint,recordsize,atime,primarycache,secondarycache -t snapshot

Show io verbose stat with latency

zpool iostat -yl 1