Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Thank you for the information. I didn't realize that the PRO_VERSION didn't change with the latest 0.6.x drops. I just tried a rolling upgrade under load from 0.6.6 to 0.6.11 - and was successful! I am impressed, Wolfram > -----Original Message----- > From: Philipp Reisner [mailto:philipp.reisner at linbit.com] > Sent: Freitag, 20. Februar 2004 12:07 > To: Weyer, Wolfram; drbd-user at nudlaug.linbit.com > Subject: Re: [DRBD-user] rolling upgrades > > > 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 : >