Under rbd usage, if a volume has tens of thousands of objects and each 4M
object only has several KB(run fio on this volume or other cases), this volume
will be very low performance during a long time after create snapshot on
this volume. The OSD will be busy with large bandwidth read/write although
the object actually has few bytes needed to be copied.
This commit try to use fiemap if backend fs support, it can skip unnecessary
range to write. It also can be beneficial to space effective, because the copied
object will be regard as snapshot object which is access infrequently.
Signed-off-by: Haomai Wang <haomaiwang@gmail.com>
Reviewed-by: Sage Weil <sage@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
Added a new command line parameter (-i or --image=) that allows rbd-fuse...
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
This is useful for qemu to guarantee live migration with caching is
safe, by invalidating the cache on the destination before starting it.
Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
This will only happen when shrinking or rolling back an image is done
while other I/O is in flight to the same ImageCtx. This is unsafe, so
return an error before performing the resize or rollback.
Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
the mount directory. The purpose of this is to allow a single RBD to be "mounted" in userspace without opening (and locking)
the other RBDs in the pool.
This is accomplished by performing a case-sensitive string compare in enumerate_images() when an image name is
specified on the command line. If no image name is specified, all images appear in the mount directory. If a non-existent
image name is specified, the mount directory is empty.
Signed-off-by: Stephen F Taylor <steveftaylor@gmail.com>
Fixes: #8202
This fixes the radosgw side of issue #8202. Needed to cast value
to unsigned char, otherwise it'd get padded.
Backport: dumpling
Signed-off-by: Yehuda Sadeh <yehuda@inktank.com>
...so that they pass when they get unlucky with thrashing.
This will vastly decrease the probability of failure, but failure will
always be possible when a timeout is in place.
Fixes: #8193
Signed-off-by: Sage Weil <sage@inktank.com>
When a pool is created with ceph osd pool create, the auid is not
inferred from the session auid and is set to zero. Add the
ceph osd pool set <pool> auid <int>
command to set it after it is created, and the matching get:
ceph osd pool get <pool> auid
Signed-off-by: Loic Dachary <loic@dachary.org>
Modified qemu-iotests workunit script to check for versions
that use the latest qemu (currently only Trusty). Limit the
tests to those that are applicable to rbd.
Fixes: 7882
Signed-off-by: Warren Usui <warren.usui@inktank.com>
Waiting for udev has been the default for a while now, and, after
switching to libkrbd, is no longer an option. (libkrbd waits for
specific devices to show up, the old behaviour was to wait for
everything udev.)
Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
