ceph/PendingReleaseNotes
Greg Farnum 4e86be9232 librados: synchronous commands should return on commit instead of ack
This is unlikely to be noticed by anybody, but it is a big change. Document
in the PendingReleaseNotes and bump up the librados minor version number
to 68.

Signed-off-by: Greg Farnum <greg@inktank.com>
2013-08-19 10:29:49 -07:00

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v0.68
~~~~~
* 'ceph osd crush set <id> <weight> <loc..>' no longer adds the osd to the
specified location, as that's a job for 'ceph osd crush add'. It will
however continue to work just the same as long as the osd already exists
in the crush map.
* The OSD now enforces that class write methods cannot both mutate an
object and return data. The rbd.assign_bid method, the lone
offender, has been removed. This breaks compatibility with
pre-bobtail librbd clients by preventing them from creating new
images.
* librados now returns on commit instead of ack for synchronous calls.
This is a bit safer in the case where both OSDs and the client crash, and
is probably how it should have been acting from the beginning. Users are
unlikely to notice but it could result in lower performance in some
circumstances. Those who care should switch to using the async interfaces,
which let you specify safety semantics precisely.