On Wed, Jun 2, 2010 at 3:54 PM, Roman Naumenko <ro...@naumenko.ca> 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. > There are two ways to increase the storage space available to a ZFS pool: 1. add more vdevs to the pool 2. replace each drive in a vdev with a larger drive The first option "expands the width" of the pool, adds redundancy to the pool, and (should) increase the performance of the pool. This is very simple to do, but requires having the drive bays and/or drive connectors available. (In fact, any time you add a vdev to a pool, including when you first create it, you go through this process.) The second option "increases the total storage" of the pool, without changing any of the redundancy of the pool. Performance may or may not increase. Once all the drives in a vdev are replaced, the storage space becomes available to the pool (depending on the ZFS version, you may need to export/import the pool for the space to become available). We've used both of the above quite successfully, both at home and at work. Not sure what your buddy was talking about. :) -- Freddie Cash fjwc...@gmail.com
_______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
