From: Jason Dillaman Date: Wed, 18 Mar 2020 16:16:28 +0000 (-0400) Subject: doc/releases/octopus: add additional RBD improvements X-Git-Tag: v15.2.0~24^2 X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=refs%2Fpull%2F34032%2Fhead;p=ceph.git doc/releases/octopus: add additional RBD improvements Signed-off-by: Jason Dillaman --- diff --git a/doc/releases/octopus.rst b/doc/releases/octopus.rst index c9968502d2e..04bf4cb28bc 100644 --- a/doc/releases/octopus.rst +++ b/doc/releases/octopus.rst @@ -113,13 +113,21 @@ RADOS **RBD** block storage ~~~~~~~~~~~~~~~~~~~~~ +* Mirroring now supports a new snapshot-based mode that no longer requires + the journaling feature and its related impacts in exchange for the loss + of point-in-time consistency (it remains crash consistent). * Clone operations now preserve the sparseness of the underlying RBD image. * The trash feature has been improved to (optionally) automatically move old parent images to the trash when their children are all deleted or flattened. +* The trash can be configured to automatically purge on a defined schedule. +* Images can be online re-sparsified to reduce the usage of zeroed extents. * The ``rbd-nbd`` tool has been improved to use more modern kernel interfaces. * Caching has been improved to be more efficient and performant. - +* ``rbd-mirror`` automatically adjusts its per-image memory usage based + upon its memory target. +* A new persistent read-only caching daemon is available to offload reads from + shared parent images. **RGW** object storage ~~~~~~~~~~~~~~~~~~~~~~