I recently (Last night to be exact) I installed Open Solaris as my NAS/Backup Server. Why you may ask? Well I love Arch Linux yet see the *need* to start using ZFS. ZFS is freakin-fan-tastic. It’s puts the S in simple, and allows you to have a filesystem that does much more than a common file system. Such as NFS, SMB, and Compression (did I mention that this is all built in :) I’m going to go through the simple process to setup a zfs striped pool, and setup a few datasets, and apple compression.
OpenSolaris tools I’ll cover:
format
zfs(1M)
zpool(1M)
Lets start out by finding the disks that we would like to add to the pool:
root@Nom:~# format < /dev/null
Which will look like this:
root@Nom:~# format < /dev/null
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c3d0
/pci@0,0/pci-ide@1f,1/ide@0/cmdk@0,0
1. c4d1
/pci@0,0/pci-ide@1f,2/ide@0/cmdk@1,0
2. c5d0
/pci@0,0/pci-ide@1f,2/ide@1/cmdk@0,0
Specify disk (enter its number):
This shows the three disks that are present in my system. I'll break it down a little. The number you see at the beginning is the number as per the format command. Then the information in the <>'s displays a disk ID, size of the disk, and some other little tidbits for the people that care.
What you're looking for is "c4d1" & "c5d0" which are the two Western Digital 1TB disks that I'm going to make my pool with.
To create the pool use the zpool command:
root@Nom:~# zpool create nom c4d1 c5d0
That's it, you've now created your first zfs pool. Just to sum up what I just did, I formatted the disks, set the mountpoints, mounted the device, and now have an active zfs pool.
If you would like to see the zpools that you currently have do the following command:
root@Nom:/nom# zpool list
NAME SIZE USED AVAIL CAP HEALTH ALTROOT
nom 1.81T 82.5K 1.81T 0% ONLINE -
rpool 149G 3.36G 146G 2% ONLINE -
I could go ahead and add a NFS share and Compression yet, why not stay organized :) I would rather create individual file systems to store the different data that I have.
To show what I mean I'll show you what a zfs file system is:
root@Nom:/nom# zfs list
NAME USED AVAIL REFER MOUNTPOINT
nom 70.5K 1.78T 18K /nom
rpool 4.36G 142G 72K /rpool
rpool/ROOT 2.37G 142G 18K legacy
rpool/ROOT/opensolaris 2.37G 142G 2.24G /
rpool/dump 1019M 142G 1019M -
rpool/export 59K 142G 19K /export
rpool/export/home 40K 142G 19K /export/home
rpool/export/home/fsk141 21K 142G 21K /export/home/fsk141
rpool/swap 1019M 143G 16K -
This command shows pools/file systems. If you look you can see my two pools (nom, rpool) and the filesystems underneath the pools (ROOT, dump, export, swap)
I would like to create subsets like the above (File Systems)
root@Nom:/nom# zfs create nom/backup
So now if I do a zfs list I get the following:
root@Nom:/nom# zfs list
NAME USED AVAIL REFER MOUNTPOINT
nom 97.5K 1.78T 18K /nom
nom/backup 18K 1.78T 18K /nom/backup
rpool 4.36G 142G 72K /rpool
rpool/ROOT 2.37G 142G 18K legacy
rpool/ROOT/opensolaris 2.37G 142G 2.24G /
rpool/dump 1019M 142G 1019M -
rpool/export 59K 142G 19K /export
rpool/export/home 40K 142G 19K /export/home
rpool/export/home/fsk141 21K 142G 21K /export/home/fsk141
rpool/swap
Since I'm going to be backing up to this file system I would like to turn on a couple little things... To get a listing of what zfs set can set then just type 'zfs set'
root@Nom:/nom# zfs set compression=on nom/backup
root@Nom:/nom# zfs set sharenfs=rw nom/backup
I've just setup automagical compression, along with a read/write nfs share for '/nom/backup' Now all I need to do is setup nfs on my client machine to connect to the nfs server.
Links:
http://www.sun.com/bigadmin/features/articles/zfs_overview.jsp
http://blogs.sun.com/timthomas/entry/creating_zfs_file_systems_from
Jackie are discussing. 
this looks great! i like it a lot more.