We've been looking at that, see: https://issues.apache.org/jira/browse/ZOOKEEPER-107
It'll take some evaluation though. Hopefully 3.5? C On Tue, Nov 29, 2011 at 10:21 PM, nileader <[email protected]> wrote: > I personal think zookeeper team need to add the feature of changing > zookeeper cluster server list in runtime---without restart server. > > 2011/11/30 nileader <[email protected]> > >> Hi，ted，you mean restart old server before new servers? >> Let's see the case: >> >> In my cluster, there are three zk server, A,B and C each config three >> server address. >> Once, i want to upgrade my cluster to five server. >> You say: >> >>> configure the new servers >>> >>> - update the configuration on the old servers >>> >>> - restart each old server one at a time >>> >>> - start the new servers >>> >>> >> >> So, when i config Server C's serverlist, it will be five server in it's >> zoo.cfg, and restart it. >> Then make change on server b. Once i restart server b, there will be only >> two server work in cluster, >> and 2< 5/2+1. >> >> So, how the leader will be elect and how the cluster will work ok? >> >> >> >> >> >> *nileader* ni掌櫃的個人郵箱 >> *MSN*： [email protected] >> *Weibo*：http://weibo.com/nileader >> ------------------------------------------------------------------------------------------------------------------------------------------------ >> This email (including any attachments) is confidential and may be legally >> privileged, private information of correct recipient and nileader. If you >> received this email in error, please delete it immediately and do not copy >> it or use it for any purpose or disclose its contents to any other person. >> Thank you. >> * >> 本電郵(包括任何附件)可能含有機密資料並受法律保護，屬於ni掌櫃和正確收件人之間的私有信息。如您不是正確的收件人，請您立即刪除本郵件。請不要將本電郵進行複製並用作任何其它用途，或透露本郵件之內容。謝謝。 >> * >> >> >> >> 2011/11/29 Ted Dunning <[email protected]> >> >>> To expand on that FAQ, the detailed process should be to >>> >>> - configure the new servers >>> >>> - update the configuration on the old servers >>> >>> - restart each old server one at a time >>> >>> - start the new servers >>> >>> - have your applications reconnect with the full set of servers in the >>> connection string. This can be done whenever you like. >>> >>> Your clients will receive a disconnect message when the server that they >>> are talking to is restarted, but they should reconnect immediately and >>> transparently. You may have a problem if your applications don't handle >>> transient disconnections properly. >>> >>> >>> >>> On Tue, Nov 29, 2011 at 3:10 AM, pubudu gunawardena <[email protected] >>> >wrote: >>> >>> > On Tue, Nov 29, 2011 at 1:08 PM, nileader <[email protected]> wrote: >>> > > >>> > > hi, all. >>> > > >>> > > If i update my conf/zoo.cfg config, must i restart my zk server? >>> > > >>> > > In my case, we have 3 servers in production environment, now, we want >>> to >>> > > upgrade to 5 server. >>> > >>> > Take a look at http://wiki.apache.org/hadoop/ZooKeeper/FAQ#A6 where it >>> > says >>> > how to upgrade ZooKeeper. >>> > > >>> > > >>> > > Any problem will happen if a kill one of three servers. >>> > > >>> > > >>> > > *[email protected]* >>> > >>> > >>> > >>> > >>> > -- >>> > Thanks, >>> > Pubudu >>> > >>> >> >>
