[Samba] Samba with CTDB able to serve non-clustered data?
martin at meltin.net
Wed Aug 10 23:07:39 UTC 2016
On Tue, 9 Aug 2016 18:08:15 -0400, Stephen Cousins via samba
<samba at lists.samba.org> wrote:
> I'd like to set up a HA Samba server that serves out data from NFS mounts.
> I was thinking that CTDB was the thing to do use but it is only mentioned
> with serving clustered file systems like Gluster, Lustre, etc. Is there a
> way to set up a HA Samba server without a clustered file system?
You don't need a cluster filesystem to use CTDB.
Cluster filesystems are mentioned in relation to CTDB for 2 reasons:
* Coherency of the file data you serve with Samba
You need to make sure that updates to the data that you are serving
are seen coherently across the cluster.
* Split brain protection
CTDB recommends using a recovery lock file in a cluster filesystem.
You don't have to use this but without it you aren't protected
against your cluster being partitioned (a.k.a. split brain).
From Samba >= 4.5, CTDB will support a configurable helper to handle
the recovery lock.
If you can satisfy these requirements then you're good to go... the
important thing is to test... :-)
The ping_pong tool can test a bunch of the necessary features:
peace & happiness,
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