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Zookeeper, mail # user - If i update my conf/zoo.cfg config, must i restart my zk server?


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Re: If i update my conf/zoo.cfg config, must i restart my zk server?
nileader 2011-11-30, 06:13
Oh,good. It is a perfect feature.

Not only in the case of upgrade, many time, when want to change our zk
server....
在 2011年11月30日 上午11:44��Camille Fournier <[EMAIL PROTECTED]>写道:

> 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���
> >> *MSN*: [EMAIL PROTECTED]
> >> *Weibo*:http://weibo.com/nileader
> >>
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> >> *
> >>
> >>
> >>
> >> 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
> >>> >
> >>>
> >>
> >>
>