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From Joe Stein <charmal...@allthingshadoop.com>
Subject Re: If i update my conf/zoo.cfg config, must i restart my zk server?
Date Wed, 30 Nov 2011 03:48:55 GMT
3.4.1 <= pushing the curve =8^) 

/*
Joe Stein
http://www.medialets.com
Twitter: @allthingshadoop
*/

On Nov 29, 2011, at 10:44 PM, Camille Fournier <camille@apache.org> wrote:

> 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 <nileader@gmail.com> 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 <nileader@gmail.com>
>> 
>>> 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
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>>> *Weibo*:http://weibo.com/nileader
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>>> 
>>> 
>>> 
>>> 2011/11/29 Ted Dunning <ted.dunning@gmail.com>
>>> 
>>>> 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 <pubudupg@gmail.com
>>>>> wrote:
>>>> 
>>>>> On Tue, Nov 29, 2011 at 1:08 PM, nileader <nileader@gmail.com>
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.
>>>>>> 
>>>>>> 
>>>>>> *--nileader@gmail.com*
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> --
>>>>> Thanks,
>>>>> Pubudu
>>>>> 
>>>> 
>>> 
>>> 

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