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From Dmitriy Setrakyan <dsetrak...@apache.org>
Subject Re: cache topology validator
Date Sun, 08 Mar 2015 04:00:37 GMT

I think we should create a ticket for it and pick it up in sprint-3 or


On Fri, Mar 6, 2015 at 5:26 AM, Yakov Zhdanov <yzhdanov@apache.org> wrote:

> Guys,
> I think we should provide user with ability to validate cache topology
> before each cache operation.
> Now user cannot validate the topology of cache update, but this seems to be
> a good feature. I can validate task topology and throw exception on MAP
> step, but I cannot do that on cache put.
> I suggest introducing special topology validator. Whenever cache topology
> changes - it is passed to validator. Validator can check nodes number and
> presence of particular (if user have servers with special role in
> topology), this also may be used to validate segment local node operates
> in. If cache topology is not valid each cache update throws exception until
> cache topology does not become valid back.
> --Yakov

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