[jira] [Created] (IGNITE-8513) SQL: Write benchmarks to compare mvcc on/off

["Pavel Kuznetsov (JIRA)" <ji...@apache.org>]

Pavel Kuznetsov created IGNITE-8513:
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             Summary: SQL: Write benchmarks to compare mvcc on/off
                 Key: IGNITE-8513
                 URL: https://issues.apache.org/jira/browse/IGNITE-8513
             Project: Ignite
          Issue Type: Task
            Reporter: Pavel Kuznetsov
            Assignee: Pavel Kuznetsov


We need to compare performance with mvcc turned on and off.

Development branch is ignite-4191

Scope

All benchmarks uses native sql api cache.query(SqlFieldsQuery)
We are using simplified data model: table containing long PK and 1 long value field.

1) Measure increased messages count load.
1 client node and many (4) server nodes.
Benchmark does updates in single thread.

2) Measure contention on mvcc processor.
Many client nodes (4) and 1 server node.
Benchmark performs updates in many threads. Threads use keys from *disjoint* ranges.

3) Measure contention on updates.
4 client nodes  and 2 server nodes. (?)
Benchmark performs updates in many threads. Thread use keys from *intersecting* ranges.
Exceptions due to contention of updating the same key should be just ignored.
update keys order should be sorted.

Common parameters:
backups count = 0 (?)
atomicity mode = transactional
cache mode = partitioned
persistence = off




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