Insufficient utilization of CPU

[imgoby]

Bug Description:

When using mysqldump to export data,

Manticore Search Version:

9.3.2 428075261@25050208 (columnar 4.2.1 0fe99f4@25050206) (secondary 4.2.1 0fe99f4@25050206) (knn 4.2.1 0fe99f4@25050206)

Operating System Version:

centos 7.9 +docker

Have you tried the latest development version?

None

Internal Checklist:

^{To be completed by the assignee. Check off tasks that have been completed or are not applicable.}

• [ ] Implementation completed
• [ ] Tests developed
• [ ] Documentation updated
• [ ] Documentation reviewed

[sanikolaev]

It might make sense to develop a mysqldump alternative that works in a similar way (i.e., as a logical backup). However, since it would be made specifically for Manticore, it could follow its own specifics - for example, reading from Manticore in parallel to make better use of the CPU.

[sanikolaev]

@KlimTodrik As discussed, let's check how much parallel selects are useful in this case.