Concurrent Disk IO in Object Server

Registered by Samuel Merritt on 2013-05-02

Eventlet doesn't help with file IO; the whole process still blocks. Use external real (i.e., not green) threads to allow for actual concurrent reads on multiple disks. That's sufficiently cross-platform that it shouldn't tick off the Illumos / FreeBSD folks too badly.

Extra bonus points for ensuring that a single slow disk won't end up with all the threads stuck waiting for it.

Blueprint information

Status:
Complete
Approver:
None
Priority:
Undefined
Drafter:
None
Direction:
Needs approval
Assignee:
Samuel Merritt
Definition:
Approved
Series goal:
Accepted for havana
Implementation:
Implemented
Milestone target:
milestone icon 1.9.0
Started by
John Dickinson on 2013-05-07
Completed by
John Dickinson on 2013-06-14

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Gerrit topic: https://review.openstack.org/#q,topic:bp/concurrent-disk-io,n,z

Addressed by: https://review.openstack.org/27126
    Use threadpools in the object server for performance.

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