Set nova config max_concurrent_disk_ops

Bug #1835559 reported by Gerry Kopec on 2019-07-05
This bug affects 1 person
Affects Status Importance Assigned to Milestone
zhipeng liu

Bug Description

In previous releases, stx-nova was patched to support option concurrent_disk_operations. This limited parallelism of heavy I/O download operations (e.g. image convert, glance downloads) and was set to 2. This option is not available in stable/stein but equivalent functionality is provided by option max_concurrent_disk_ops. See commit:

We should investigate taking advantage of the nova feature to handle heavy i/o stress scenarios. Note that nova defaults the feature to off so we'll need to override it to the desired setting.

I haven't observed a test scenario where this is problem yet so that would also have to be established.

Ghada Khalil (gkhalil) wrote :

Marking as stx.3.0 as this is likely a good nova feature to explore using in stx. But this doesn't sound critical enough to hold up stx.2.0

tags: added: stx.3.0 stx.distro.openstack
Changed in starlingx:
importance: Undecided → Medium
status: New → Triaged
assignee: nobody → yong hu (yhu6)
Changed in starlingx:
assignee: yong hu (yhu6) → chen haochuan (martin1982)
zhipeng liu (zhipengs) on 2019-09-04
Changed in starlingx:
assignee: chen haochuan (martin1982) → zhipeng liu (zhipengs)

Fix proposed to branch: master

Changed in starlingx:
status: Triaged → In Progress
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