Quotas & ReservationsĪll the filesystems in a pool share the same disk space, This maximises flexibility and lets ZFS make best use of the resources, however it does allow one filesystem to use all the space. You can read about the remaining properties in the Sun ZFS Administration Guide. I’m going to look at three properties in this section: quota, reservation and compression (sharenfs will be covered in a future tutorial). We’ll see an example of an inherited property in the section on compression (below). Source, this is because we set the mountpoint for this filesystem above. The mountpoint property is shown as from a local inherited - the property is inherited from a parent filesystem.local - the property is set directly on this filesystem.default - the default ZFS value for this property.The SOURCE value shows where a property gets its value from, other than ‘-‘ there are three sources for a property: The first set of properties, with a SOURCE of ‘-‘, are read only and give information on your filesystem the rest of the properties can be set with NAME PROPERTY VALUE SOURCE salmon/kent type filesystem - salmon/kent creation Fri Apr 6 13:14 2007 - salmon/kent used 24.5K - salmon/kent available 134G - salmon/kent referenced 24.5K - salmon/kent compressratio 1.00x - salmon/kent mounted yes - salmon/kent quota none default salmon/kent reservation none default salmon/kent recordsize 128K default salmon/kent mountpoint /fishing local salmon/kent sharenfs off default salmon/kent checksum on default salmon/kent compression off default salmon/kent atime on default salmon/kent devices on default salmon/kent exec on default salmon/kent setuid on default salmon/kent readonly off default salmon/kent zoned off default salmon/kent snapdir hidden default salmon/kent aclmode groupmask default salmon/kent aclinherit secure default To use files on an existing filesystem, create two 128 MB files, eg.: 256 MB of disk space on an existing partition.Root privileges (or a role with the appropriate ZFS rights profile).Linux with ZFS kernel module (not tested by author).
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In this tutorial we look at ZFS filesystem management, including creating new filesystems, destroying them and adjusting their properties.Īs the poet said, ‘Only God can make a tree’ - probably because it’s so hard to figure out how to get the bark on. In ZFS Tutorial part 1 we looked at ZFS pool management. This series of tutorials shows you how to use ZFS with simple hands-on examples that require a minimum of resources. ZFS is an open source filesystem used in Solaris 10, with growing support from other operating systems. Learning to use ZFS, Sun’s new filesystem.
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