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From "Yakov Zhdanov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-446) Implement cache topology validator
Date Tue, 10 Mar 2015 13:20:39 GMT
Yakov Zhdanov created IGNITE-446:

             Summary: Implement cache topology validator
                 Key: IGNITE-446
                 URL: https://issues.apache.org/jira/browse/IGNITE-446
             Project: Ignite
          Issue Type: Task
            Reporter: Yakov Zhdanov
             Fix For: sprint-3

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

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.

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