[DRBD-user] drbd-8.0pre5 write conflict question

Philipp Reisner philipp.reisner at linbit.com
Tue Oct 3 16:56:37 CEST 2006

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

Am Dienstag, 3. Oktober 2006 16:46 schrieb KOZMAN Balint:
> Hi there,
> It's nice to see, that pre5 is out there. I thought of upgrading from
> pre4, but there is a line in the changelog that makes me fear, namely:
>  * The write conflict detection code for primary-primary is currently
>    broken, but will be fixed soon.
> Does that mean that pre5 shouldn't be used in primary-primary situations?

This means:

In case the DLM of your OCFS2/GFS fails, the your data is corrupt 
and DRBD does not know that it's mirrors are out of sync:
I.e. you would need to start a full sync manually, after you 
repaired the file system and got the DLM to work again.

If the conflict detection would work it would be:

In case the DLM of your OCFS2/GFS fails, DRBD would tell you that fact.
You data is probably corrupt. No resync needed. After you repaired
your file system everything is fine again.

: Dipl-Ing Philipp Reisner                      Tel +43-1-8178292-50 :
: LINBIT Information Technologies GmbH          Fax +43-1-8178292-82 :
: Schönbrunnerstr 244, 1120 Vienna, Austria    http://www.linbit.com :

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