Kevin Brennan wrote:
>> Note that DRBD can only be accessed on one node at a time (the so
>> called active node) so it may not be suitable if you want all of your
>> fileservers serving requests simultaneously.
>> Not quite true, it's regulary used in active/passive mode but DRBD can
> also support active/active mode using a clustered file system like OCFS2
> or GFS.
As soon as I sent that, I knew I'd get corrected. From
"In spite of this limitation, there are still a few ways to access the
data on the second node:
* Use DRBD on logical volumes and use LVM's capabilities to take
snapshots on the standby node, and access the data via the snapshot.
* DRBD's primary-primary mode with a shared disk file system (GFS,
OCFS2). These systems are very sensitive to failures of the replication
network. Currently we cannot generally recommend this for production use."
I'd be interested to hear of people successfully using DRBD in such a
way in production without problems.
Stephen Mulcahy Atlantic Linux http://www.atlanticlinux.ie
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