* Re: [gentoo-user] [OT] RAID 1 over network
@ 2009-06-16 13:58 99% ` Philipp Riegger
0 siblings, 0 replies; 1+ results
From: Philipp Riegger @ 2009-06-16 13:58 UTC (permalink / raw
To: gentoo-user
On Tue, 2009-06-16 at 16:45 +0300, Daniel Iliev wrote:
> DRBD is HA solution which is achieved by switching the role of the
> nodes in case the "active node" goes offline. I think DRBD is not meant
> for the schema OP has described, because only the "active node" is
> accessible via FS. DRBD works between the FS and block device layers.
> It catches the FS writes from the active node and sends them over the
> network. DRBD on the backup node receives those and replicates them
> directly to the disk driver. Thus you can't have mounted FS on the
> backup node. If the active node goes offline, the backup node takes
> over which means DRBD switches roles and the FS has to be mounted
> afterwards.
But that might be a good solution with 2.6.30, NFS and FSCACHE.
Another solution would be to use ndb (network block devices), dm-raid
and a cluster filesystem.
Philipp
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2009-06-16 10:40 [gentoo-user] [OT] RAID 1 over network Renat Golubchyk
2009-06-16 12:58 ` Mike Kazantsev
2009-06-16 13:45 ` Daniel Iliev
2009-06-16 13:58 99% ` Philipp Riegger
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