ceph/PendingReleaseNotes
Sage Weil f8d37a2cc4 Merge remote-tracking branch 'gh/master' into wip-watch-notify
Conflicts:
	PendingReleaseNotes

Reviewed-by: Samuel Just <sjust@redhat.com>
Reviewed-by: Josh During <jdurgin@redhat.com>
2014-12-16 14:02:32 -08:00

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v0.90
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* Previously, the formatted output of 'ceph pg stat -f ...' was a full
pg dump that included all metadata about all PGs in the system. It
is now a concise summary of high-level PG stats, just like the
unformatted 'ceph pg stat' command.
* All JSON dumps of floating point values were incorrecting surrounding the
value with quotes. These quotes have been removed. Any consumer of structured
JSON output that was consuming the floating point values was previously having
to interpret the quoted string and will most likely need to be fixed to take
the unquoted number.
* The 'category' field for objects has been removed. This was originally added
to track PG stat summations over different categories of objects for use by
radosgw. It is no longer has any known users and is prone to abuse because it
can lead to a pg_stat_t structure that is unbounded. The librados API calls
that accept this field now ignore it, and the OSD no longers tracks the
per-category summations.
* The output for 'rados df' has changed. The 'category' level has been
eliminated, so there is now a single stat object per pool. The structure of
the JSON output is different, and the plaintext output has one less column.
* The 'rados create <objectname> [category]' optional category argument is no
longer supported or recognized.
* rados.py's Rados class no longer has a __del__ method; it was causing
problems on interpreter shutdown and use of threads. If your code has
Rados objects with limited lifetimes and you're concerned about locked
resources, call Rados.shutdown() explicitly.
* There is a new version of the librados watch/notify API with vastly
improved semantics. Any applications using this interface are
encouraged to migrate to the new API. The old API calls are marked
as deprecated and will eventually be removed.
* The librados rados_unwatch() call used to be safe to call on an
invalid handle. The new version has undefined behavior when passed
a bogus value (for example, when rados_watch() returns an error and
handle is not defined).