Admin en 17:51 17 mar 2009

2009-03-17T17:51:31Z

Admin: Created page with '==Getting Started with ZFS== Everything you hate about managing file systems and volumes is gone: you don't have to format, newfs, mount, edit /etc/vfstab, fsck, growfs, metadb,...'

2009-03-17T17:49:37Z

Created page with '==Getting Started with ZFS== Everything you hate about managing file systems and volumes is gone: you don't have to format, newfs, mount, edit /etc/vfstab, fsck, growfs, metadb,...'

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==Getting Started with ZFS==

Everything you hate about managing file systems and volumes is gone: you don't have to format, newfs, mount, edit /etc/vfstab, fsck, growfs, metadb, metainit, etc.

Meet your new best friends: zpool(1M) and zfs(1M).

ZFS is easy, so let's get on with it! It's time to create your first pool:

# zpool create tank c1t2d0

You now have a single-disk storage pool named tank, with a single file system mounted at /tank. There is nothing else to do.

If you want mirrored storage for mail and home directories, that's easy too:

Create the pool:

# zpool create tank mirror c1t2d0 c2t2d0

Create the /var/mail file system:

# zfs create tank/mail

# zfs set mountpoint=/var/mail tank/mail

Create home directories, and mount them all in /export/home/<username>:

# zfs create tank/home

# zfs set mountpoint=/export/home tank/home

# zfs create tank/home/ahrens

# zfs create tank/home/billm

# zfs create tank/home/bonwick

# zfs create tank/home/eschrock

…

ZFS file systems are hierarchical: each one inherits properties from above. In this example, the mountpoint property is inherited as a pathname prefix. That is, tank/home/ahrens is automatically mounted at /export/home/ahrens because tank/home is mounted at /export/home. You don't have to specify the mountpoint for each individual user — you just tell ZFS the pattern.

This is how we actually set up home directory and mail service on zion.eng, which has been running ZFS for over a year and a half.

But wait, there's more!

ZFS provides built-in compression. To compress all home directories:

# zfs set compression=on tank/home

To give ahrens a 10G quota:

# zfs set quota=10g tank/home/ahrens

To give bonwick a 100G reservation (membership has its privileges):

# zfs set reservation=100g tank/home/bonwick

To automatically NFS-export all home directories read/write:

# zfs set sharenfs=rw tank/home

To scrub all disks and verify the integrity of all data in the pool:

# zpool scrub tank

To replace a flaky disk:

# zpool replace tank c2t2d0 c4t1d0

To add more space:

# zpool add tank mirror c5t1d0 c6t1d0

To move your pool from SPARC machine 'sparky' to AMD machine 'amdy':

[on sparky]
# zpool export tank

Physically move your disks from sparky to amdy.

[on amdy]
# zpool import tank

Everything will just work — ZFS has 'adaptive endianness' to cope with different byte order on different platforms.

You get the idea: it's simple. Any common ZFS operation can be done with a single short command.

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	ZFS file systems are hierarchical: each one inherits properties from above. In this example, the mountpoint property is inherited as a pathname prefix. That is, tank/home/ahrens is automatically mounted at /export/home/ahrens because tank/home is mounted at /export/home. You don't have to specify the mountpoint for each individual user — you just tell ZFS the pattern.		ZFS file systems are hierarchical: each one inherits properties from above. In this example, the mountpoint property is inherited as a pathname prefix. That is, tank/home/ahrens is automatically mounted at /export/home/ahrens because tank/home is mounted at /export/home. You don't have to specify the mountpoint for each individual user — you just tell ZFS the pattern.

ZFS: getting started - Historial de revisiones

Admin en 17:51 17 mar 2009

Admin: Created page with '==Getting Started with ZFS== Everything you hate about managing file systems and volumes is gone: you don't have to format, newfs, mount, edit /etc/vfstab, fsck, growfs, metadb,...'