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Re: ZK to coordinate across data centers - Zookeeper - [mail # dev]
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...You can't do ZK guaranteed live at all times across an even number of data centers. If you want to guarantee quorum even if you lose a datacenter you need an odd number of datacenters for yo...
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Author: Camille Fournier,
2012-05-09, 20:46
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Re: ZK to coordinate across data centers - Zookeeper - [mail # dev]
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...What's your BCP requirements? Do you need to span clusters because you need continued availability if one cluster goes down? What write throughput do you expect to need, how many clients do ...
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Author: Camille Fournier,
2012-05-09, 14:16
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Re: Ephermal node and notifications for stateless sessions - Zookeeper - [mail # dev]
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...In what you're describing, your service creates ephemeral nodes on behalf of its clients, and has to track the clients liveness. You're redoing a lot of the logic ZK would handle for you if ...
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Author: Camille Fournier,
2012-05-08, 14:29
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Re: ZK to coordinate across data centers - Zookeeper - [mail # dev]
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...It can, but it depends on what you're doing. If you want to give us some more information on your proposed use case we can maybe help you more. C On Tue, May 8, 2012 at 3:21 AM, ...
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Author: Camille Fournier,
2012-05-08, 13:42
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Re: How to replace a zookeeper server ? - Zookeeper - [mail # user]
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...Agreed that just restarting is probably the easiest way to go. I'm trying to reason how to do this with a rolling restart without any downtime at all, and I'm not 100% sure that is safely po...
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Author: Camille Fournier,
2012-04-18, 14:04
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Re: How to replace a zookeeper server ? - Zookeeper - [mail # user]
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...Probably a variant on the rolling restart is the right way to go: http://wiki.apache.org/hadoop/ZooKeeper/FAQ#A6 On Tue, Apr 17, 2012 at 2:48 AM, David Song wrote: o...
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Author: Camille Fournier,
2012-04-18, 02:50
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Re: Input on a change - Zookeeper - [mail # user]
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...I've done extensive ZK client testing mostly using mocks with great success. I agree that there's cases when embedding a ZK is probably the easiest way to go, but it is actually much easier ...
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Author: Camille Fournier,
2012-04-16, 18:40
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Re: Input on a change - Zookeeper - [mail # dev]
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...Sure, mocking it's a helluva lot faster too. C On Apr 16, 2012 12:54 PM, "Ishaaq Chandy" wrote: to . t ail.com>: fe ps n. m t t to le h e...
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Author: Camille Fournier,
2012-04-16, 17:13
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Re: Input on a change - Zookeeper - [mail # dev]
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...I believe that this change is inspired by someone that runs zk embedded. Personally I'm not moved by the testing argument, embedding the server for testing is a bit of an anti pattern in my ...
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Author: Camille Fournier,
2012-04-16, 12:55
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Re: Input on a change - Zookeeper - [mail # dev]
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...This is a good point. I think this change should be fine for the server portion of the code, since it's designed to be run as a standalone system. But for the client connection to also call ...
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Author: Camille Fournier,
2012-04-15, 18:28
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