[jira] [Created] (IGNITE-2834) IGFS: Introduce optional co-location of metadata.

[Anton Vinogradov (Jira)]

Vladimir Ozerov created IGNITE-2834:
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             Summary: IGFS: Introduce optional co-location of metadata.
                 Key: IGNITE-2834
                 URL: https://issues.apache.org/jira/browse/IGNITE-2834
             Project: Ignite
          Issue Type: Task
          Components: IGFS
    Affects Versions: 1.5.0.final
            Reporter: Vladimir Ozerov
             Fix For: 1.6


*Description*
IGFS meta manager heavily relies on transactions in REPLICATED cache. Some transactions operate on more than 1 keys. As key affinity is not specified at the moment, different Ignite nodes host different primary keys. As a result, transaction on multiple keys might lead to relatively big number of network requests during 2PC.

*Solution*
If we co-located all metadata on a single node, transaction commit will require less network trips, thus decreasing latency and contention.



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