I wonder how OCFS (or some other distributed file system) would run over
btfrs (raid10, no raid6), over AOE or iSCSI block devices.
Roberto Spadim wrote:
OCFS with DRBD could work very nice in linux
i didn't tested mdadm with ndb in a production enviroment
DRBD have brainsplit solutions, since you will run a complex
filesystem, i consider using working solutions, DRBD and OCFS is nice
yes, mdadm can run under DRBD
DRBD = raid1 over network
OCFS = oracle filesystem (cluster filesystem)
it works
2011/3/30 Stan Hoeppner<stan@xxxxxxxxxxxxxxxxx>:
Roman Mamedov put forth on 3/30/2011 3:49 AM:
On Wed, 30 Mar 2011 11:20:41 +0400
CoolCold<coolthecold@xxxxxxxxx> wrote:
Looking on your host I think you speak russian, so may be this will be
somehow helpful for you
http://community.livejournal.com/ru_root/2216389.html
Thanks -- I have looked through the websites of some distributed filesystems
(Ceph, GlusterFS, MooseFS etc) and checked this thread too, but from what I
could find, all filesystems I read about so far are at most capable of RAID0 or
RAID1-like modes, where fault-tolerance is either not provided, or achieved
only by "all data is replicated across N nodes", which of course divides the
total usable space by N. I haven't found any FS which would do block-level
replication relying not on dumb copies, but on RAID5/6-like parity algorithms
for fault-tolerance. Maybe I missed something?
You likely won't find any distributed filesystem that performs block
level replication over the network, at least not a FOSS one. These are
filesystems, mind you, not distributed block device drivers. If they
perform any replication to afford a level of fault tolerance, it will be
at the file level, not the block level.
If you want true block level replication over a network, look into DRBD.
However, it is also limited to mirroring.
--
Stan
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