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# Tested on RHEL 6 & 7
# Choose the F.S. to resize and verify current size zfs list NAME USED AVAIL REFER MOUNTPOINT c_pool 204K 19.6G 30K /c_pool c_pool/zfs01 30K 1024M 30K /zfs01 c_pool/zfs02 30K 19.6G 30K /filesystem02 m_pool 100K 9.78G 30K /m_pool ZPOOL=c_pool ZFS=zfs01 df -h /$ZFS Filesystem Size Used Avail Use% Mounted on c_pool/zfs01 1.0G 128K 1.0G 1% /zfs01 # Extend F.S. to 2GB zfs set quota=2g $ZPOOL/$ZFS # Check zfs list NAME USED AVAIL REFER MOUNTPOINT c_pool 204K 19.6G 30K /c_pool c_pool/zfs01 30K 2.00G 30K /zfs01 c_pool/zfs02 30K 19.6G 30K /filesystem02 m_pool 100K 9.78G 30K /m_pool df -h /$ZFS Filesystem Size Used Avail Use% Mounted on c_pool/zfs01 2.0G 128K 2.0G 1% /zfs01 # Reduce F.S. back to 1GB zfs set quota=1g $ZPOOL/$ZFS # Check zfs list NAME USED AVAIL REFER MOUNTPOINT c_pool 204K 19.6G 30K /c_pool c_pool/zfs01 30K 1024M 30K /zfs01 c_pool/zfs02 30K 19.6G 30K /filesystem02 m_pool 100K 9.78G 30K /m_pool df -h /$ZFS Filesystem Size Used Avail Use% Mounted on c_pool/zfs01 1.0G 128K 1.0G 1% /zfs01 # Here is what happens if we fill up a little bit our filesystem and then try to reduce it # below the boundary of used space df -h /$ZFS Filesystem Size Used Avail Use% Mounted on c_pool/zfs01 1.0G 350M 675M 35% /zfs01 zfs set quota=256m $ZPOOL/$ZFS cannot set property for 'c_pool/zfs01': size is less than current used or reserved space |