Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Am Montag, 16. Februar 2004 17:27 schrieb Weyer, Wolfram: > Hi, > have there been thoughts about upgrading drbd in a failover-cluster without > shutting down the service? > > I am thinking of this scenario: > - put standby server to offline > - upgrade drbd on this node > - bring standby server online again > - resync the newversion-standby with oldversion-active > - failover > - then upgrade the former active > > Currently there is a piece of code that prevents different-version-drbds to > communicate in drbd_receiver.c, which means that a bugfix-upgrade for drbd > causes a significant outage for the server. This hurts in an HA > application. Solutions like md in a shared storage environment can deal > much easier with this. > > First I can think of bugfixes that have no effect on data-structures and > data-flow over the network, there is no need to force the versions to > incompatible then. Then checking with a new define similar to API_VERSION > for drbduser, which does not increase for these changes would make it > happen. > I doubt there is a change to implement rolling upgrades from 0.6.x to 0.7 > but having this in mind for the 0.6 maintenance releases would help a lot. > > /Wolfram > This was introduced before 0.6 was released. Rolling upgrades are supported for all 0.6.x releases (not for some earlier 0.6-preX releases) -Philipp -- : 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 :