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Zookeeper, mail # user - Zookeeper multiserver setup?


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Something Something 2012-05-08, 21:31
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Jordan Zimmerman 2012-05-08, 21:36
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Something Something 2012-05-08, 21:43
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Jordan Zimmerman 2012-05-08, 21:45
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Something Something 2012-05-08, 21:54
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Adam Rosien 2012-05-09, 15:33
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Patrick Hunt 2012-05-09, 22:24
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Adam Rosien 2012-05-10, 15:16
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Patrick Hunt 2012-05-17, 21:27
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Re: Zookeeper multiserver setup?
Jordan Zimmerman 2012-05-08, 22:05
You have 9 instances? That's a lot. Why so many?

I believe the "Node" field in the stat is the number of ZKNodes, not
instances in the ensemble. That stat looks good. It means that that
instance is serving requests as a "follower" instance (one of the
instances will be the leader).

-JZ

On 5/8/12 2:54 PM, "Something Something" <[EMAIL PROTECTED]> wrote:

>Hmm...
>
>
>Trying 127.0.0.1...
>Connected to localhost.
>Escape character is '^]'.
>stat
>Zookeeper version: 3.3.4-cdh3u3--1, built on 01/26/2012 20:09 GMT
>Clients:
> /127.0.0.1:42510[0](queued=0,recved=1,sent=0)
>
>Latency min/avg/max: 0/0/0
>Received: 4
>Sent: 3
>Outstanding: 0
>Zxid: 0x100000000
>Mode: follower
>Node count: 11
>Connection closed by foreign host.
>
>
>Not sure I understand this output.  I have 9 nodes in the ensemble.
>
>On Tue, May 8, 2012 at 2:45 PM, Jordan Zimmerman
><[EMAIL PROTECTED]>wrote:
>
>> Yes - they should. Keep in mind that the zoo.cfg, and the ID file must
>>be
>> correct and in agreement on each instance. You can do a stat on each
>> instance to see what state it's in:
>>
>>    >telnet localhost 2181
>>     stat
>>
>> -JZ
>>
>> On 5/8/12 2:43 PM, "Something Something" <[EMAIL PROTECTED]>
>>wrote:
>>
>> >Thanks Jordan.  Will definitely look at the cluster management tool.
>>In
>> >the mean time, am I correct with my assumption in #4?  Once all of them
>> >are
>> >started they would automagically start talking to each other, right?
>> >
>> >
>> >On Tue, May 8, 2012 at 2:36 PM, Jordan Zimmerman
>> ><[EMAIL PROTECTED]>wrote:
>> >
>> >> Yes, you must start them all individually. ZooKeeper does not
>>currently
>> >> have any cluster-wide management tools built in.
>> >>
>> >> FYI - we've open sourced a cluster management tool for ZooKeeper.
>>Please
>> >> have a look:
>> >>
>> >>        https://github.com/Netflix/exhibitor
>> >>
>> >> On 5/8/12 2:31 PM, "Something Something" <[EMAIL PROTECTED]>
>> >>wrote:
>> >>
>> >> >Hello,
>> >> >
>> >> >Trying to follow directions from here:
>> >> >
>> >>
>> >>
>>
>>http://zookeeper.apache.org/doc/trunk/zookeeperAdmin.html#sc_zkMulitServe
>> >>r
>> >> >Setup
>> >> >
>> >> >to setup a cluster of zookeepers.
>> >> >
>> >> >Questions:
>> >> >
>> >> >1)  If everything is setup correctly, do I have to go to each
>>machine
>> >>and
>> >> >start Zookeeper server in each of them individually?
>> >> >2)  I was thinking if I start it on one master machine (well
>>there's no
>> >> >real master) then all zookeepers in the quorum would be started, but
>> >>this
>> >> >is not how it works correct?
>> >> >3)  If I start individually, then I get messages saying the other
>> >> >zookeepers haven't started.  Is that just a warning?
>> >> >4)  When all of them are started, would they all be able to talk to
>> >>each
>> >> >other?
>> >> >
>> >> >Sorry for the dumb questions and thanks for the help.
>> >>
>> >>
>>
>>
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Something Something 2012-05-08, 22:13
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Jordan Zimmerman 2012-05-08, 22:19
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Something Something 2012-05-08, 22:46
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Patrick Hunt 2012-05-09, 22:21