[DRBD-user] Primary SyncTarget and dead Secondary SyncSource during synchronization.

Lars Ellenberg Lars.Ellenberg at linbit.com
Thu Jul 14 11:13:43 CEST 2005

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

/ 2005-07-14 04:01:13 +0400
\ Igor Yu. Zhbanov:
> Hello!
> Few weeks ago there was discussion about how Primary can be SyncTarget.
> As I understand, the only way is to begin synchronization as a SyncSource,
> than switch to Primary state.
> 2005-06-23 09:19:02 +0200 Martin Bene:
> > If you make a sync target primary, all reads for out-of-sync data are
> > fetched from the sync source, so the data read off the drbd device stays
> > consistent. Especially in an active/active cluster with multiple drbd
> > devices this greatly reduces risk of long startup delays.
> But what will happen with Primary SyncTarget when Secondary SyncSource
> will die before the end of synchronization?


well, the exact thing that happens currently in this situation is:
 drbd_panic("Sorry, I have no access to good data anymore.\n");

other suggestions?

: Lars Ellenberg                                  Tel +43-1-8178292-0  :
: LINBIT Information Technologies GmbH            Fax +43-1-8178292-82 :
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