Home | About | Sematext search-lucene.com search-hadoop.com
 Search Hadoop and all its subprojects:

Switch to Threaded View
Zookeeper, mail # dev - dev meeting minutes


Copy link to this message
-
Re: dev meeting minutes
Alexander Shraer 2011-07-13, 05:59
Thats part of it. Turned out that its a bit more complicated but you're right - Zookeeper does have a lot of things already in place that make reconfiguration pretty easy.

Thanks,
Alex

On Jul 12, 2011, at 7:01 PM, "Thomas Koch" <[EMAIL PROTECTED]> wrote:

> Vishal Kher:
>> Thanks. Looking forward to reading the paper.
>>
>> On Tue, Jul 12, 2011 at 1:11 PM, Alexander Shraer <shralex@yahoo-
> inc.com>wrote:
>>> Hi Vishal,
>>>
>>> At the meeting I presented the general approach I'm following to
>>> implement reconfiguration in ZK. If I understood correctly, the concern
>>> was broadly that there are a lot of cases to consider and that
>>> correctness is non-trivial. We agreed that I'll prepare a detailed
>>> writeup of the protocol and changes made to ZK. I believe that this
>>> should address most of the concerns.
>>>
>>> The positive points raised in the meeting were that the method offers
>>> minimal interruption to service during reconfiguration, uses normal ZK
>>> operation flow, and does not require modifications to other ZK
>>> operations.
>>>
>>> Best Regards,
>>> Alex
> Hi Alex,
>
> I don't know your approach to cluster reconfiguration, but I had a thought
> about it lately that may be rather trivial, if I didn't oversee anything.
> Cluster reconfiguration would need to be an operation that goes through the
> leader and gets acknowledged by a quorum. All operations following the cluster
> reconfiguration operation would need to be committed by the new quorum.
>
> I hope this idea might help and I didn't make a fool of myself. :-)
>
> Best regards,
>
> Thomas Koch, http://www.koch.ro