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[ZOOKEEPER-702] GSoC 2010: Failure Detector Model - Zookeeper - [issue]
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...Failure Detector ModulePossible MentorHenry Robinson (henry at apache dot org)RequirementsJava, some distributed systems knowledge, comfort implementing distributed systems protocolsDescript...
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http://issues.apache.org/jira/browse/ZOOKEEPER-702
Author: Henry Robinson,
2012-05-07, 10:35
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Re: zkpython improvements - Zookeeper - [mail # dev]
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...Hi Duncan - Great that you're working on the python bindings! That's very cool. Regarding your questions, answers inline. On 28 March 2012 14:52, Duncan Findlay wrote...
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Author: Henry Robinson,
2012-04-04, 23:19
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[ZOOKEEPER-578] ResponderThread should be able to use TCP or UDP - Zookeeper - [issue]
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...The ResponderThread, which responds to inquiries for the current leader, currently only uses UDP. It also only runs for electionAlg=0. Observers will eventually require that a ResponderThrea...
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http://issues.apache.org/jira/browse/ZOOKEEPER-578
Author: Henry Robinson,
2012-04-03, 21:16
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Re: Work on CLI - Zookeeper - [mail # dev]
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...Hi Hartmut - Great! Any improvements to the CLI are most welcome. Compatibility *is* a concern; although I don't think we view the CLI as an API that we have to maintain, we shou...
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Author: Henry Robinson,
2012-02-27, 02:31
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Re: znode defaults - Zookeeper - [mail # user]
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...It seems like the multi-txn API might be helpful here. Since each path is of known length, you could have a multi-op query that is get(/a/b/c/d), get(/a/b/c), get(/a/b), get(/a) ...
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Author: Henry Robinson,
2012-02-22, 01:19
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Re: QuorumPeer requires at least 2 peers? - Zookeeper - [mail # user]
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...It's not, unfortunately. The reason being that every live quorum must intersect in at least one node in order to avoid a split-brain problem. So you can't have a two different quorums consis...
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Author: Henry Robinson,
2012-02-03, 00:31
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Re: QuorumPeer requires at least 2 peers? - Zookeeper - [mail # user]
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...Yes, that's right. More precisely, a quorum of peers (hence the name ;)) mus t participate in an election round for it to terminate. In your case, with a two node cluster, a quorum is...
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Author: Henry Robinson,
2012-02-03, 00:09
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Re: Reducing the unit test running time - Zookeeper - [mail # dev]
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...On 16 January 2012 17:36, Patrick Hunt wrote: That's a good point, but I don't know that we can really say the tests as they stand are at all representative of what real users a...
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Author: Henry Robinson,
2012-01-17, 06:35
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Reducing the unit test running time - Zookeeper - [mail # dev]
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...Hi - The unit tests are taking longer and longer to run, particularly locally. I was poking about looking for some easy wins, and I noticed that a lot of the time is spent waiting for ...
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Author: Henry Robinson,
2012-01-16, 07:39
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Re: Distributed ZooKeeper cluster design - Zookeeper - [mail # user]
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...On 13 December 2011 08:09, Dima Gutzeit wrote: As for fallback, ofcourse in A and B I would want to define C as a backup, I think observers are a good fit for you. If you ...
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Author: Henry Robinson,
2011-12-13, 18:37
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