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Re: [Linux-cluster] Simple data replication in a cluster

Thanks.  I'll check out corosync.

Mark K Vallevand   Mark Vallevand Unisys com
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-----Original Message-----
From: linux-cluster-bounces redhat com [mailto:linux-cluster-bounces redhat com] On Behalf Of Digimer
Sent: Thursday, April 03, 2014 04:18 PM
To: linux clustering
Subject: Re: [Linux-cluster] Simple data replication in a cluster

On 03/04/14 04:58 PM, Vallevand, Mark K wrote:
> I'm looking for a simple way to replicate data within a cluster.
> It looks like my resources will be self-configuring and may need to push
> changes they see to all nodes in the cluster.  The idea being that when
> a node crashes, the resource will have its configuration present on the
> node on which it is restarted.  We're talking about a few kb of data,
> probably in one file, probably text.  A typical cluster would have
> multiple resources (more than two), one resource per node and one extra
> node.
> Ideas?
> Could I use the CIB directly to replicate data?  Use cibadmin to update
> something and sync?
> How big can a resource parameter be?  Could a resource modify its
> parameters so that they are replicated throughout the cluster?
> Is there a simple file replication Resource Agent?
> Drdb seems like overkill.
> Regards.
> Mark K Vallevand Mark Vallevand Unisys com

If you don't want to use DRBD + gfs2 (what I use), then you'll probably 
want to look at corosync directly for keeping the data in sync. 
Pacemaker itself is a cluster resource manager and I don't think the cib 
is well suited for general data sync'ing.

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