Thanks Ivan! On Thu, May 3, 2012 at 11:20 AM, Ivan Kelly <[email protected]> wrote:
> On Thu, May 03, 2012 at 10:45:51AM -0400, John Nagro wrote: > > Okay - and doing the upgrade to a live cluster? I can do that to 1 > machine > > at a time while the cluster is still online and everything should operate > > as normal? I have 5 machines, use 3 at a time, quorum of 2. > In terms of rolling restarts, if ensemble size if 3 and you have 5 > machines, you can bring down one machine at a time and it'll be > fine. Any clients writing to that machine will move very quickly to > using one of the other machines (it'll see the network drop, and > rebuild an ensemble from the other machines). > > Regarding whether you need to run the upgrade code, it depends on what > the old version of bookkeeper you are using is. If you need to run > upgrade, the bookie will warn you and fail to start. > > https://issues.apache.org/jira/browse/BOOKKEEPER-163 is actually the > change that requires the upgrade framework. > > -Ivan >
