[libvirt] [PATCH 0/2] rbd: improvements to actual disk-usage calculation
From: Jason Dillaman <dillaman(a)redhat.com>
The RBD fast-diff feature can vastly reduce the amount of time needed
to calculate actual disk usage of volumes, but it might still be a
slow operation for large RBD pools or pools with large RBD images.
Therefore, this feature should be able to be optionally disabled if
needed.
Additionally, the fast-diff feature can only be used if the fast-diff
map isn't flagged as invalid. Otherwise, librbd will silently perform
a costly block-by-block scan to calculate the disk usage.
Jason Dillaman (2):
rbd: do not attempt to use fast-diff if it's marked invalid
rbd: optionally disable actual disk-usage during pool/volume refresh
docs/formatstorage.html.in | 13 ++++-
src/storage/storage_backend_rbd.c | 80 ++++++++++++++++++++++++++++---
2 files changed, 84 insertions(+), 9 deletions(-)
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2.20.1