I''m wondering if I can get all the benefits of EVMS and LVM with ZFS I''m planing on ZFS with a Raid-Z 1.- Can I expand volumes like I do with LVM ? 2.- Is there a central cosole (like EVMS) to do all the managment ? 3.- How do I monitor the hard drives ? 4.- If there is a drive failure do the rebuilt happens automatically or I have to issue commands for it to occur ? 5.- What''s the storage efficiency of Raid-Z ? Thanks in advance for any replies This message posted from opensolaris.org
Humberto Ramirez wrote:> I''m wondering if I can get all the benefits of EVMS and LVM with ZFS > I''m planing on ZFS with a Raid-Z > > 1.- Can I expand volumes like I do with LVM ? >You simply add more LUNs to a pool. The filesystems on the pool can grow until the size of the pool is exceeded. There are plans afoot to allow for the growing of LUNs already in the pool.> 2.- Is there a central cosole (like EVMS) to do all the managment ? >There is a web gui available, yes.> 3.- How do I monitor the hard drives ? >Monitor them for what? This is probably an array specific question.> 4.- If there is a drive failure do the rebuilt happens automatically or > I have to issue commands for it to occur ? >I think this one has been answered before. Did you check the mailing list archives?> 5.- What''s the storage efficiency of Raid-Z ?I think this one has been answered before. Did you check the mailing list archives?
Thanks for replying (I thought nobody would bother.) So, If understand correctly, I won''t give up ANYTHING available in EVMS. LVM , Linux Raid - by going to ZFS and Raid -Z Right ? This message posted from opensolaris.org
No, there are some features we haven''t implemented, that may or may not be available in other RAID solutions. In particular: - ZFS storage pool cannot be ''shrunk'', i.e. removing an entire toplevel device (mirror, RAID group, etc). Devices can be removed by attaching and detaching to existing mirrors, but you cannot shrink the overall size of the pool. - ZFS RAID-Z stripes cannot be expanded. ZFS storage pools are all dynamically striped across all device groups. So you can add a new RAID-Z group ((5+1) -> 2x(5+1) for example), but you cannot expand an existing stripe ((5+1) -> (6+1)). There are likely other features that are different and/or missing from other solutions, so it''s a little extreme to say you "won''t give up ANYTHING". But in terms of large scale features, there''s not much besides the two above, and remember that you have a lot to gain ;-) - Eric On Fri, Aug 11, 2006 at 09:28:58AM -0700, Humberto Ramirez wrote:> Thanks for replying (I thought nobody would bother.) > > So, If understand correctly, I won''t give up ANYTHING available in > EVMS. LVM , Linux Raid - by going to ZFS and Raid -Z Right ? > > > This message posted from opensolaris.org > _______________________________________________ > zfs-discuss mailing list > zfs-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss-- Eric Schrock, Solaris Kernel Development http://blogs.sun.com/eschrock