Re: [libvirt] [PATCH v3 0/3] rbd: improvements to actual disk-usage calculation

From: Jason Dillaman <dillaman(a)redhat.com&gt; 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. since v1: - Moved RBD-unique refresh volume allocation override to shared storage pool attribute sice v2: - Moved attribute under new "<refresh><volume allocation='...'/></refresh>" elements. Jason Dillaman (3): rbd: do not attempt to use fast-diff if it's marked invalid storage: optional 'refresh' elemement on pool rbd: optionally compute volume allocation from capacity docs/formatstorage.html.in | 27 ++++++++++++ docs/schemas/storagecommon.rng | 7 ++++ docs/schemas/storagepool.rng | 23 ++++++++++ src/conf/storage_conf.c | 27 ++++++++++++ src/conf/storage_conf.h | 9 ++++ src/storage/storage_backend_rbd.c | 42 +++++++++++++++++-- .../pool-rbd-refresh-volume-allocation.xml | 15 +++++++ .../pool-rbd-refresh-volume-allocation.xml | 18 ++++++++ tests/storagepoolxml2xmltest.c | 1 + 9 files changed, 165 insertions(+), 4 deletions(-) create mode 100644 tests/storagepoolxml2xmlin/pool-rbd-refresh-volume-allocation.xml create mode 100644 tests/storagepoolxml2xmlout/pool-rbd-refresh-volume-allocation.xml