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Re: Semantics of close and ephemeral nodes - Zookeeper - [mail # user]
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...As far as I understand, it is guaranteed to be closed on the leader. I am not sure about another servers. 2013/5/3 Rohan Desai Best regards, Vitalii Tymchysh...
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Author: Vitalii Tymchyshyn,
2013-05-03, 12:03
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Re: Getting confused with the "recipe for lock" - Zookeeper - [mail # user]
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...BTW: We've had to introduce external cron script that were killing processes spending too much in GC. That helped in similar situation. 2013/1/16 Benjamin Reed Bes...
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Author: Vitalii Tymchyshyn,
2013-01-27, 19:29
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Re: Getting confused with the "recipe for lock" - Zookeeper - [mail # user]
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...There are two events: disconnected and session expired. The ephemeral nodes are removed after the second one. The client receives both. So to implement "at most one lock holder" scheme...
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Author: Vitalii Tymchyshyn,
2013-01-14, 15:38
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Re: Getting confused with the "recipe for lock" - Zookeeper - [mail # user]
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...I don't see why clock must be in sync. They are counting time periods (timeouts). Also note the difference between disconnected and session expired events. This time difference is when clien...
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Author: Vitalii Tymchyshyn,
2013-01-14, 10:37
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Re: ZK on EC2 micro instances? - Zookeeper - [mail # user]
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...Please note that micro instance has very bad CPU pattern - as soon as you go through some limit in CPU usage, it starts to crawl, literally. It's something like 98% of stolen CPU time (don't...
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Author: Vitalii Tymchyshyn,
2012-12-17, 02:22
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Re: leader election, scheduled tasks, losing leadership - Zookeeper - [mail # user]
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...I am asking because you have this "at most once" vs "at least one" problem. I don't think you can have "exactly one" unless your jobs are transactional and you can synhronize your transactio...
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Author: Vitalii Tymchyshyn,
2012-12-11, 20:09
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Re: leader election, scheduled tasks, losing leadership - Zookeeper - [mail # user]
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...How are you going to ensure atomicity? I mean, if you processor dies in the middle of the operation, how do you know if it is done or not? Best regards, Vitalii Tymchyshyn 10 груд. 201...
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Author: Vitalii Tymchyshyn,
2012-12-10, 06:49
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Re: Connection closed exceptions with slow fsync and CancelledKeyExceptions - Zookeeper - [mail # user]
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...What's your filesystem & vm.dirty_ratio? May be your OS flushes a lot sometimes. See e.g. http://www.sysxperts.com/home/announce/vmdirtyratioandvmdirtybackgroundratio 2012/11/7 mattgo...
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Author: Vitalii Tymchyshyn,
2012-11-12, 00:12
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Re: forceSync=no - Zookeeper - [mail # user]
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...Hello. Please note that in general not doing fsync may lead to inconsistent data where latter data was written and earlier was not. This may not be a problem if ZooKeeper v...
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Author: Vitalii Tymchyshyn,
2012-06-18, 12:55
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Re: Get sequence number without node creation - Zookeeper - [mail # user]
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...18.11.11 11:20, Ivan Kelly написав(ла): This will work on connection drop, but not for disconnect/reconnect AFAIK....
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Author: Vitalii Tymchyshyn,
2011-11-18, 12:42
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