[IGNITE-4106] SQL: parallelize sql queries over cache local partitions

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.7
• Fix Version/s: 1.9
• Component/s: sql
• Labels: performance
• Assignee: Andrey Mashenkov
• Reporter: Andrey Mashenkov
• Created: 24/Oct/16 10:31
• Updated: 03/Mar/17 14:28
• Resolved: 23/Feb/17 12:59

Description

If we run SQL query on cache partitioned over several cluster nodes, it will be split into several queries running in parallel. But really we will have one thread per query on each node.
So, for now, to improve SQL query performance we need to run more Ignite instances or split caches manually.

It seems to be better to split local SQL queries over cache partitions, so we would be able to parallelize SQL query on every single node and utilize CPU more efficiently.

Issue Links

• is related to: IGNITE-4746 Add documentation for SQL query parallelism
• links to: GitHub Pull Request #1476
• links to: GitHub Pull Request #1556
• links to: Upsource review IGNT-CR-80