support volume local cache
Currently there're different types of fast NVME SSDs which r/w throughput can be 2.x~3.x GB/s, latency can be ~10 us. While typical remote volume for a VM can be hundreds of MB/s, latency can be millisecond level (iscsi / rbd). So these fast SSDs can be mounted on compute node locally and used as a cache for remote volumes. This BP add the support of this.
Blueprint information
- Status:
- Started
- Approver:
- Balazs Gibizer
- Priority:
- Undefined
- Drafter:
- Liang Fang
- Direction:
- Needs approval
- Assignee:
- Liang Fang
- Definition:
- Approved
- Series goal:
- None
- Implementation:
-
Started
- Milestone target:
- None
- Started by
- Balazs Gibizer
- Completed by
Related branches
Related bugs
Sprints
Whiteboard
Gerrit topic: https:/
Addressed by: https:/
Support volume local cache
[efried 20200214] Spec approved
[efried 20200217] Whoops, I made a mistake; the spec isn't approved yet, sorry.
[efried 20200220] Agreed in nova meeting to approve spec freeze exception. Spec is approved, so approving the blueprint.
Addressed by: https:/
Add volume local cache support
[gibi 20200414] we hit feature freeze in Ussuri, so it is deferred
[gibi 20200629] approved as the has been spec approved
[gibi 20200928] as we hit feature freeze I'm deferring this from Victoria
