From: Sage Weil Date: Mon, 8 Sep 2014 16:31:38 +0000 (-0700) Subject: doc/release-notes: v0.85 X-Git-Tag: v0.86~126 X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=836a6701d6693b655f38d3b521c9069d8dabdae1;p=ceph.git doc/release-notes: v0.85 Signed-off-by: Sage Weil --- diff --git a/PendingReleaseNotes b/PendingReleaseNotes index 0189d7add437..f15a4beedfc9 100644 --- a/PendingReleaseNotes +++ b/PendingReleaseNotes @@ -1,23 +1,7 @@ -v0.85 +v0.86 ----- -* The client-side caching for librbd is now enabled by default (rbd - cache = true). A safety option (rbd cache writethrough until flush - = true) is also enabled so that writeback caching is not used until - the library observes a 'flush' command, indicating that the librbd - users is passing that operation through from the guest VM. This - avoids potential data loss when used with older versions of qemu - that do not support flush. - - leveldb_write_buffer_size = 32*1024*1024 = 33554432 // 32MB - leveldb_cache_size = 512*1024*1204 = 536870912 // 512MB - leveldb_block_size = 64*1024 = 65536 // 64KB - leveldb_compression = false - leveldb_log = "" - OSDs will still maintain the following osd-specific defaults: - leveldb_log = "" - -v0.86 +v0.87 ----- diff --git a/doc/release-notes.rst b/doc/release-notes.rst index b5e6262a3d2b..5592272e7bf9 100644 --- a/doc/release-notes.rst +++ b/doc/release-notes.rst @@ -2,6 +2,130 @@ Release Notes =============== +v0.85 +===== + +This is the second-to-last development release before Giant that +contains new functionality. The big items to land during this cycle +are the messenger refactoring from Matt Benjmain that lays some +groundwork for RDMA support, a performance improvement series from +SanDisk that improves performance on SSDs, lots of improvements to our +new standalone civetweb-based RGW frontend, and a new 'osd blocked-by' +mon command that allows admins to easily identify which OSDs are +blocking peering progress. The other big change is that the OSDs and +Monitors now distinguish between "misplaced" and "degraded" objects: +the latter means there are fewer copies than we'd like, while the +former simply means the are not stored in the locations where we want +them to be. + +Also of note is a change to librbd that enables client-side caching by +default. This is coupled with another option that makes the cache +write-through until a "flush" operations is observed: this implies +that the librbd user (usually a VM guest OS) supports barriers and +flush and that it is safe for the cache to switch into writeback mode +without compromising data safety or integrity. It has long been +recommended practice that these options be enabled (e.g., in OpenStack +environments) but until now it has not been the default. + +We have frozen the tree for the looming Giant release, and the next +development release will be a release candidate with a final batch of +new functionality. + +Upgrading +--------- + +* The client-side caching for librbd is now enabled by default (rbd + cache = true). A safety option (rbd cache writethrough until flush + = true) is also enabled so that writeback caching is not used until + the library observes a 'flush' command, indicating that the librbd + users is passing that operation through from the guest VM. This + avoids potential data loss when used with older versions of qemu + that do not support flush. + + leveldb_write_buffer_size = 32*1024*1024 = 33554432 // 32MB + leveldb_cache_size = 512*1024*1204 = 536870912 // 512MB + leveldb_block_size = 64*1024 = 65536 // 64KB + leveldb_compression = false + leveldb_log = "" + + OSDs will still maintain the following osd-specific defaults: + + leveldb_log = "" + +* The 'rados getxattr ...' command used to add a gratuitous newline to the attr + value; it now does not. + +Notable Changes +--------------- + +* ceph-disk: do not inadvertantly create directories (Owne Synge) +* ceph-disk: fix dmcrypt support (Sage Weil) +* ceph-disk: linter cleanup, logging improvements (Alfredo Deza) +* ceph-disk: show information about dmcrypt in 'ceph-disk list' output (Sage Weil) +* ceph-disk: use partition type UUIDs and blkid (Sage Weil) +* ceph: fix for non-default cluster names (#8944, Dan Mick) +* doc: document new upstream wireshark dissector (Kevin Cox) +* doc: many install doc updates (John Wilkins) +* librados: fix lock leaks in error paths (#9022, Paval Rallabhandi) +* librados: fix pool existence check (#8835, Pavan Rallabhandi) +* librbd: enable caching by default (Sage Weil) +* librbd: fix crash using clone of flattened image (#8845, Josh Durgin) +* librbd: store and retrieve snapshot metadata based on id (Josh Durgin) +* mailmap: many updates (Loic Dachary) +* mds: add min/max UID for snapshot creation/deletion (#9029, Wido den Hollander) +* misc build errors/warnings for Fedora 20 (Boris Ranto) +* mon: add 'osd blocked-by' command to easily see which OSDs are blocking peering progress (Sage Weil) +* mon: add perfcounters for paxos operations (Sage Weil) +* mon: create default EC profile if needed (Loic Dachary) +* mon: fix crash on loopback messages and paxos timeouts (#9062, Sage Weil) +* mon: fix divide by zero when pg_num is adjusted before OSDs are added (#9101, Sage Weil) +* mon: fix occasional memory leak after session reset (#9176, Sage Weil) +* mon: fix ruleset/ruleid bugs (#9044, Loic Dachary) +* mon: make usage dumps in terms of bytes, not kB (Sage Weil) +* mon: prevent implicit destruction of OSDs with 'osd setmaxosd ...' (#8865, Anand Bhat) +* mon: verify all quorum members are contiguous at end of Paxos round (#9053, Sage Weil) +* msgr: refactor to cleanly separate SimpleMessenger implemenetation, move toward Connection-based calls (Matt Benjamin, Sage Wei) +* objectstore: clean up KeyValueDB interface for key/value backends (Sage Weil) +* osd: add local_mtime for use by cache agent (Zhiqiang Wang) +* osd: add superblock for KeyValueStore backend (Haomai Wang) +* osd: add support for Intel ISA-L erasure code library (Andreas-Joachim Peters) +* osd: do not skip promote for write-ordered reads (#9064, Samuel Just) +* osd: fix ambigous encoding order for blacklisted clients (#9211, Sage Weil) +* osd: fix cache flush corner case for snapshotted objects (#9054, Samuel Just) +* osd: fix discard of old/obsolete subop replies (#9259, Samuel Just) +* osd: fix discard of peer messages from previous intervals (Greg Farnum) +* osd: fix dump of open fds on EMFILE (Sage Weil) +* osd: fix journal dump (Ma Jianpeng) +* osd: fix mon feature bit requirements bug and resulting log spam (Sage Weil) +* osd: fix recovery chunk size usage during EC recovery (Ma Jianpeng) +* osd: fix recovery reservation deadlock for EC pools (Samuel Just) +* osd: fix removal of old xattrs when overwriting chained xattrs (Ma Jianpeng) +* osd: fix requesting queueing on PG split (Samuel Just) +* osd: force new xattrs into leveldb if fs returns E2BIG (#7779, Sage Weil) +* osd: implement alignment on chunk sizes (Loic Dachary) +* osd: improve prioritization of recovery of degraded over misplaced objects (Sage Weil) +* osd: locking, sharding, caching improvements in FileStore's FDCache (Somnath Roy, Greg Farnum) +* osd: many important bug fixes (Samuel Just) +* osd, mon: add rocksdb support (Xinxin Shu, Sage Weil) +* osd, mon: distinguish between "misplaced" and "degraded" objects in cluster health and PG state reporting (Sage Weil) +* osd: refactor some ErasureCode functionality into command parent class (Loic Dachary) +* osd: set rollback_info_completed on create (#8625, Samuel Just) +* rados: allow setxattr value to be read from stdin (Sage Weil) +* rados: drop gratuitous \n from getxattr command (Sage Weil) +* rgw: add --min-rewrite-stripe-size for object restriper (Yehuda Sadeh) +* rgw: add powerdns hook for dynamic DNS for global clusters (Wido den Hollander) +* rgw: copy object data is target bucket is in a different pool (#9039, Yehuda Sadeh) +* rgw: do not try to authenticate CORS preflight requests (#8718, Robert Hubbard, Yehuda Sadeh) +* rgw: fix civetweb URL decoding (#8621, Yehuda Sadeh) +* rgw: fix removal of objects during object creation (Patrycja Szablowska, Yehuda Sadeh) +* rgw: fix striping for copied objects (#9089, Yehuda Sadeh) +* rgw: fix test for identify whether an object has a tail (#9226, Yehuda Sadeh) +* rgw: fix when stripe size is not a multiple of chunk size (#8937, Yehuda Sadeh) +* rgw: improve civetweb logging (Yehuda Sadeh) +* rgw: misc civetweb frontend fixes (Yehuda Sadeh) +* sysvinit: add support for non-default cluster names (Alfredo Deza) + + v0.84 =====