drbd-user March 2010 archive
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drbd-user: Re: [DRBD-user] Guarantee write to both nodes

Re: [DRBD-user] Guarantee write to both nodes

From: Digimer <linux_at_nospam>
Date: Fri Mar 19 2010 - 16:38:11 GMT
To: Yuri Ushakov <yuri.ushakov@gmail.com>

On 10-03-19 11:24 AM, Yuri Ushakov wrote:
> I need synchronous replication over network, but with one strict rule -
> if DRBD says something is written, it should already be written to both
> nodes. When secondary is down, and DRBD is still writing to the primary
> - that is not really synchronous replication. That behaviour makes it
> asynchronous, because actual write to the secondary node is delayed.
> In general, I want to ensure that when database transaction is commited,
> the data rests on both nodes. If secondary is unavailable, transaction
> should be rolled back.
> Thanks,
> Yuri.

Hmm, it seems like it's a bit outside of the original goal of DRBD, but
it might be doable via the 'on-io-error' or 'fencing' options. Take a
look at this: http://www.drbd.org/users-guide/re-drbdconf.html

-- Digimer E-Mail: linux@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org _______________________________________________ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user