Vladimir Ozerov created IGNITE-2721:
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Summary: Optimize ATOMIC cache request/responses.
Key: IGNITE-2721
URL: https://issues.apache.org/jira/browse/IGNITE-2721
Project: Ignite
Issue Type: Sub-task
Components: cache
Affects Versions: 1.5.0.final
Reporter: Vladimir Ozerov
Assignee: Ilya Lantukh
Priority: Critical
Fix For: 1.6
Our request/responses for ATOMIC cache has lots of fields which are normally
unused.
To give an idea on possible optimizations lets look closely on
GridNearAtomicUpdateRequest:
* {{futVer}} - could be converted to int
* {{syncMode}} - why do we pass it? Can it be derived from cache config?
* {{op}} - can it be derived form request?
* Entry processors and invoke arguments - can be moved to extras, or separate
request class can be created for them.
* Conflict data - usually null, must be moved to extras
* Expiry policy - must be moved to extras.
* {{filter}} - only one filter is ever passed - when we need to compare
existing value. Lets pass the value instead!
* Lots of flags - can be written as a single byte. Though, it's priority is not
so high.
* {{topVer}} - could easily be inlined to save allocations and network traffic.
As a result of this investigation we must create a list of optimizations to be
performed and prioritize them. Then we should implement them one by one,
keeping them merged in a separate branch (not master!) until we are sure that
we did everything we can.
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