From: Jason Dillaman <[email protected]> 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(-) -- 2.20.1 -- libvir-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/libvir-list
