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From Andrey Mashenkov <andrey.mashen...@gmail.com>
Subject MVCC test coverage.
Date Wed, 21 Nov 2018 14:57:10 GMT
Hi Igniters,

As you may already know, MVCC transaction feature will be available in
upcoming Ignite-2.7.
However, MVCC Tx feature is released for beta testing and has many
limitations and we a going
to improve stability and integrations with other features in future

We can reuse existed transactional cache tests and run them in Mvcc mode to
get much better test coverage with small looses.
Here is a ticket for this IGNITE-10001 [1].

This mean we will have twice more "Cache Tests" and get TC runs some longer.
To reduce new Mvcc cache suites impact and save TC time we are going to
1. Include new tests to nightly suite only, this will allow us to put our
ears to the ground.
2. Exclude non-tx tests and non-relevant tx cases and aggressively mute
tests for unsupported features integrations.

I've implement a PR to one of  tasks [2] as an example how it can be done.

Technical details:
1. Introduced a new FORCE_MVCC flag and created a child "Mvcc Cache 2"
suite for "Cache 2" test suite with FORCE_MVCC flag on.
2. Implemented a hook that change TRANSACTIONAL cache atomicity mode to
This allow us to check MVCC mode without creating new test classes and
minimal intervention in existed tests code.
3. All irrelevant tests marked as ignored in Mvcc suite.
4. Known unsupported cases are muted. New failures muted as well
(corresponding tickets were created).

Any pros\cons?
Can someone please review a PR?

[1] https://issues.apache.org/jira/browse/IGNITE-10001
[2] https://issues.apache.org/jira/browse/IGNITE-10002
Best regards,
Andrey V. Mashenkov

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