Richard Elling said the following, on 06/02/2010 08:50 PM:
On Jun 2, 2010, at 3:54 PM, Roman Naumenko wrote:
Recently I talked to a co-worker who manages NetApp storages. We discussed size
changes for pools in zfs and aggregates in NetApp.
And some time before I had suggested to a my buddy zfs for his new home storage
server, but he turned it down since there is no expansion available for a pool.
Heck, let him buy a NetApp :-)
No chances, he likes to do build everything by himself.
And he really wants to be able to add a drive or couple to an existing pool.
Yes, there are ways to expand storage to some extent without rebuilding it.
Like replacing disk with larger ones. Not enough for a typical home user I
would say.
Why not? I do this quite often. Growing is easy, shrinking is more challenging.
And this is might be an important for corporate too. Frankly speaking I doubt
there are many administrators use it in DC environment.
Nevertheless, NetApp appears to have such feature as I learned from my
co-worker. It works with some restrictions (you have to zero disks before
adding, and rebalance the aggregate after and still without perfect
distribution) - but Ontap is able to do aggregates expansion nevertheless.
So, my question is: what does prevent to introduce the same for zfs at present
time? Is this because of the design of zfs, or there is simply no demand for it
in community?
Its been there since 2005: zpool subcommand add.
-- richard
Well, I explained it not very clearly. I meant the size of a raidz array
can't be changed.
For sure zpool add can do the job with a pool. Not with a raidz
configuration.
Roman Naumenko
ro...@naumenko.ca
_______________________________________________
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
