Ceph driver tuning
|Assignee:||Jaime Melis||% Done:|
|Category:||Drivers - Storage|
This patch moves the 'snap' and 'protect' operations from VM disks to VM images, leaving only the 'clone' operation for VM disks.
feautre #3362: Delay clone operations for snapshots, this also to
perform live snapshots
#1 Updated by Ruben S. Montero about 6 years ago
- Tracker changed from Feature to Backlog
- Target version deleted (
I see two problems with this patch:
1.- It introduces an arbitrary number of snapshot layers, i.e. when an image is copied multiple times; this will probably impact in performance. Using snapshots for rapid VM disk image provisioning is already in use in the TM (i.e multiple 1st layer snapshots of the golden image)
2.- We will require a migration path as most of the operations now need to refer to snapshots (@snap sources), current registered images won't work.
Although it may help when dealing with copying and registering images, this is normally a one-time operation and something probably you want to settle down before firing VMs. Probably reducing snapshot layers and having already the snapshots in the TM code is better for the overall performance.
I'm holding down this patch to further discuss this.