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Re: Consistency in zookeeper - Zookeeper - [mail # user]
...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...
   Author: Martin Kou, 2013-03-01, 21:50
Does the sync time limit between servers have anything to do with Zookeeper's timeliness guarantee? - Zookeeper - [mail # user]
...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...
   Author: Martin Kou, 2012-10-09, 01:58
Millions of opened connections to Zookeeper cluster possible? - Zookeeper - [mail # user]
...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...
   Author: Martin Kou, 2012-09-17, 22:56
Re: The State of Python Zookeeper libraries and collaboration - Zookeeper - [mail # user]
...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)...
   Author: Martin Kou, 2012-05-20, 19:29
Re: How to recover previous watcher & event after "session expired" - Zookeeper - [mail # user]
...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...
   Author: Martin Kou, 2012-05-19, 21:31
Re: How to know if connection to zk is successful in C API. - Zookeeper - [mail # user]
...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  ...
   Author: Martin Kou, 2012-05-14, 10:49
Re: How to deal with fork() properly when using the zkc mt lib - Zookeeper - [mail # user]
...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...
   Author: Martin Kou, 2012-05-11, 06:41
Re: Does Leader Election Have a "Settling" period? - Zookeeper - [mail # user]
...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...
   Author: Martin Kou, 2012-05-10, 23:45
Distributed STM with Zookeeper 3.4.x possible? - Zookeeper - [mail # user]
...Hi folks,  It seems to me that with the multi-update operation in Zookeeper 3.4.x, it should be possible to do a form of distributed STM?  The idea I have is this...  - For ev...
   Author: Martin Kou, 2012-05-09, 20:48
Zookeeper client session time outs while sending requests? - Zookeeper - [mail # user]
...Hi folks,  I found that while using Zookeeper's sync API in C.. when a Zookeeper server is taken down, client can block for a long time (i.e. far longer than the session timeout) - seem...
   Author: Martin Kou, 2012-05-04, 06:27
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