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Friday, 11 August 2006 22:50 |
Before putting my monster NAS online (pictures will follow soon), I am playing a lot with NEXENTA under VMWARE player.
I've found that excellent PDF (THE LAST WORD IN FILE SYSTEMS) which explain why ZFS may be the Saint Graal of file system, while if you want to learn how to administrate pool, I recommend YouThe ZFS admin guide
Here
is my first try, with 7 simulated disks (this example use files and not
real devices even if I have 7 real disks sitting next to me ;-)), next
steps will be to export the pool as NFS share, plug some disks out,
activate encryption, crontab snapshots and remote ssh backup of some
vital data.
| # mkdir /vault | create a directory for storing all virtual disks |
# mkfile 64m /vault/disk1
# mkfile 64m /vault/disk2
# mkfile 64m /vault/disk3
# mkfile 64m /vault/disk4
# mkfile 64m /vault/disk5
# mkfile 64m /vault/disk6
# mkfile 64m /vault/disk7
| I create 7 virtual disk name disk1 to disk7 |
# zpool status
no pools available | check if there is any pool already defined.... | |
# zpool create nasvault raidz /vault/disk1 /vault/disk2 /vault/disk3 /vault/disk4 /vault/disk5 /vault/disk6 | 6 disks will be in a raidz pool |
# zpool status
pool: nasvault
state: ONLINE
scrub: none requested
config:
NAME
STATE READ WRITE CKSUM
nasvault
ONLINE 0
0 0
raidz
ONLINE 0
0 0
/vault/disk1 ONLINE
0 0 0
/vault/disk2 ONLINE
0 0 0
/vault/disk3 ONLINE
0 0 0
/vault/disk4 ONLINE
0 0 0
/vault/disk5 ONLINE
0 0 0
/vault/disk6 ONLINE
0 0 0
| RAIDZ:
A replicated RAID-Z configuration can now have
either single- or double-parity, which means that one or two device failures can be sustained
respectively, without any data loss. Disks can be of different size, and there is no write hole as found in other RAID arrays.
| #df -h /nasvault
Filesystem
size used avail capacity Mounted on
nasvault 384M 16K 384M
1% /nasvault | checking size of the pool | | #zpool add nasvault raidz /vault/disk5 /vault/disk6 | Extending pool on the fly with 2 new disks |
Some
noise about the development of a mini opensolaris boot file
(miniroot.gz) under 60 Mb and able to boot on a USB disk have pop up on
OpenSolaris forums. Exactly at the right scheedule for my NAS project,
if it can come out in less than 2 weeks, it would be perfect!
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