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Re: Consistency in zookeeper - Zookeeper - [mail # user]
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...Yasin, If the two clients are connected to two different ZooKeeper servers in the cluster, then, yes. Generally, if you're worried that there may be another client working on the...
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Author: Martin Kou,
2013-03-01, 21:50
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Does the sync time limit between servers have anything to do with Zookeeper's timeliness guarantee? - Zookeeper - [mail # user]
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...Hi folks, The consistency guarantees section of Zookeeper's doc mentioned that the clients view of the system is guaranteed to be up-to-date within a certain time period. What that per...
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Author: Martin Kou,
2012-10-09, 01:58
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Millions of opened connections to Zookeeper cluster possible? - Zookeeper - [mail # user]
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...Hi all, I'm having a use case where there're potentially millions of client processes connected to a Zookeeper cluster, but only a very small proportion of them would be actively sendi...
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Author: Martin Kou,
2012-09-17, 22:56
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Re: The State of Python Zookeeper libraries and collaboration - Zookeeper - [mail # user]
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...A pure Python implementation shouldn't be needed for gevent. It should be sufficient to run the Zookeeper client in async mode in a background thread (with mt or st.. personally I prefer st)...
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Author: Martin Kou,
2012-05-20, 19:29
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Re: How to recover previous watcher & event after "session expired" - Zookeeper - [mail # user]
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...Correct. And even simple connection losses can cause watches to become unreliable as well: http://zookeeper.apache.org/doc/trunk/releasenotes.html#Watch+Management "One caveat to the w...
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Author: Martin Kou,
2012-05-19, 21:31
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Re: How to know if connection to zk is successful in C API. - Zookeeper - [mail # user]
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...The connection API is asynchronous, you'll need to look for the session state changes in the watcher_callback. Best Regards, Martin Kou On Mon, May 14, 2012 at 2:04 AM, 李赫元 ...
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Author: Martin Kou,
2012-05-14, 10:49
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Re: How to deal with fork() properly when using the zkc mt lib - Zookeeper - [mail # user]
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...Jon, Hmm... I'm not sure when you're going to fork() though. What I've done before was to do the fork() before each zookeeper_init(). The simplest scheme is for each process to hold on...
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Author: Martin Kou,
2012-05-11, 06:41
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Re: How to deal with fork() properly when using the zkc mt lib - Zookeeper - [mail # user]
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...If you don't mind the hackish-ness, I think you can just grab the file descriptor from a Zookeeper handle like this for mt - int fd = ((int *)zhandle)[0]; This works because the ...
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Author: Martin Kou,
2012-05-10, 23:53
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Re: How to deal with fork() properly when using the zkc mt lib - Zookeeper - [mail # user]
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...I've had a similar problem as well, but I've been using the single threaded async library - I actually find it simpler to use than the mt library. The way I do it is this: During...
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Author: Martin Kou,
2012-05-10, 23:51
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Re: Does Leader Election Have a "Settling" period? - Zookeeper - [mail # user]
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...I've been using Zookeeper 3.3.5 and the time needed to reconnect after leader death seems to be close to 4 seconds. I think a large part of it is due to the server nodes needing to confirm t...
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Author: Martin Kou,
2012-05-10, 23:45
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