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Re: ZK on EC2 micro instances? - Zookeeper - [mail # user]
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...I have tried it on small instances (a few years ago) and it didn't work well. I attributed the problems at the time to the fact that the small instances could check out for significant...
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Author: Ted Dunning,
2012-12-15, 16:10
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Re: Znodes are really wait-free objects? - Zookeeper - [mail # user]
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...Wait-free means that from the user's point of view, all operations will proceed or fail immediately. Synchronization internal to the server to ensure coherent memory access doesn't rea...
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Author: Ted Dunning,
2012-12-10, 17:58
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Re: determining zookeeper capacity requirements - Zookeeper - [mail # user]
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...On Fri, Dec 7, 2012 at 6:50 PM, Ian Kallen wrote: Good theory except that it may compromise getting cores. Excellent....
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Author: Ted Dunning,
2012-12-07, 19:24
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Re: determining zookeeper capacity requirements - Zookeeper - [mail # user]
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...Is there any swap activity on the client or server boxes? On Thu, Dec 6, 2012 at 8:25 PM, Ian Kallen wrote: ...
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Author: Ted Dunning,
2012-12-07, 01:34
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Re: very uneven distribution of clients to servers... - Zookeeper - [mail # user]
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...Next test would be to incorporate a small patch to seed the shuffling of server names by the client ID or something. On Thu, Dec 6, 2012 at 12:32 PM, Brian Tarbox wrote: ...
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Author: Ted Dunning,
2012-12-07, 01:25
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Re: determining zookeeper capacity requirements - Zookeeper - [mail # user]
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...This sounds like configuration somewhere. Have you checked the usual suspects: a) GC on client or ZK cluster? b) bad configuration on ZK which allows split quorum? (r...
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Author: Ted Dunning,
2012-12-06, 04:51
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Re: determining zookeeper capacity requirements - Zookeeper - [mail # user]
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...THis looks like very low load. What is the rate of change on znodes (i.e. what is the desired watch signal rate)? On Wed, Dec 5, 2012 at 10:10 PM, Ian Kallen wrote: ...
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Author: Ted Dunning,
2012-12-05, 23:37
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Re: very uneven distribution of clients to servers... - Zookeeper - [mail # user]
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...Shuffle depends on Math.random which is seeded by time of start. That should be just fine. On Wed, Dec 5, 2012 at 11:35 PM, Camille Fournier wrote: ...
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Author: Ted Dunning,
2012-12-05, 22:54
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Re: very uneven distribution of clients to servers... - Zookeeper - [mail # user]
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...Kishore, That should be a good explanation, but it depends on where the returning node gets put into the replication chain. Most replicating systems get put at the end of a repli...
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Author: Ted Dunning,
2012-12-05, 22:53
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Re: Network partition and ephemeral nodes - Zookeeper - [mail # user]
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...Any single ZK operation will throw an error if a disconnect from the quorum is detected during an operation. The way that you would normally see this in the middle of a fast sequence o...
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Author: Ted Dunning,
2012-11-25, 21:30
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