Ceph 9.0.3 发布分布式文件系统

Ceph 9.0.3 发布，此版本最直观的改进是内部改进（用户不可见）：OSD 的 ObjectStore 接口改进。同时还有大量关于 RGW，RBD 和其他 CephFS scrub/repair 方面的改进和修复。

更新

The return code for librbd’s rbd_aio_read and Image::aio_read API methods no longer returns the number of bytes read upon success. Instead, it returns 0 upon success and a negative value upon failure.
‘ceph scrub’, ‘ceph compact’ and ‘ceph sync force are now DEPRECATED. Users should instead use ‘ceph mon scrub’, ‘ceph mon compact’ and ‘ceph mon sync force’.
‘ceph mon_metadata’ should now be used as ‘ceph mon metadata’. There is no need to deprecate this command (same major release since it was first introduced).
The –dump-json option of “osdmaptool” is replaced by –dump json.
The commands of “pg ls-by-{pool,primary,osd}” and “pg ls” now take “recovering” instead of “recovery”, to include the recovering pgs in the listed pgs.

值得注意的改进

autotools: fix out of tree build (Krxysztof Kosinski)
autotools: improve make check output (Loic Dachary)
buffer: add invalidate_crc() (Piotr Dalek)
buffer: fix zero bug (#12252 Haomai Wang)
build: fix junit detection on Fedora 22 (Ira Cooper)
ceph-disk: install pip > 6.1 (#11952 Loic Dachary)
cephfs-data-scan: many additions, improvements (John Spray)
ceph: improve error output for ‘tell’ (#11101 Kefu Chai)
ceph-objectstore-tool: misc improvements (David Zafman)
ceph-objectstore-tool: refactoring and cleanup (John Spray)
ceph_test_rados: test pipelined reads (Zhiqiang Wang)
common: fix bit_vector extent calc (#12611 Jason Dillaman)
common: make work queue addition/removal thread safe (#12662 Jason Dillaman)
common: optracker improvements (Zhiqiang Wang, Jianpeng Ma)
crush: add –check to validate dangling names, max osd id (Kefu Chai)
crush: cleanup, sync with kernel (Ilya Dryomov)
crush: fix subtree base weight on adjust_subtree_weight (#11855 Sage Weil)
crypo: fix NSS leak (Jason Dillaman)
crypto: fix unbalanced init/shutdown (#12598 Zheng Yan)
doc: misc updates (Kefu Chai, Owen Synge, Gael Fenet-Garde, Loic Dachary, Yannick Atchy-Dalama, Jiaying Ren, Kevin Caradant, Robert Maxime, Nicolas Yong, Germain Chipaux, Arthur Gorjux, Gabriel Sentucq, Clement Lebrun, Jean-Remi Deveaux, Clair Massot, Robin Tang, Thomas Laumondais, Jordan Dorne, Yuan Zhou, Valentin Thomas, Pierre Chaumont, Benjamin Troquereau, Benjamin Sesia, Vikhyat Umrao)
erasure-code: cleanup (Kefu Chai)
erasure-code: improve tests (Loic Dachary)
erasure-code: shec: fix recovery bugs (Takanori Nakao, Shotaro Kawaguchi)
libcephfs: add pread, pwrite (Jevon Qiao)
libcephfs,ceph-fuse: cache cleanup (Zheng Yan)
librados: add src_fadvise_flags for copy-from (Jianpeng Ma)
librados: respect default_crush_ruleset on pool_create (#11640 Yuan Zhou)
librbd: fadvise for copy, export, import (Jianpeng Ma)
librbd: handle NOCACHE fadvise flag (Jinapeng Ma)
librbd: optionally disable allocation hint (Haomai Wang)
librbd: prevent race between resize requests (#12664 Jason Dillaman)
log: fix data corruption race resulting from log rotation (#12465 Samuel Just)
mds: expose frags via asok (John Spray)
mds: fix setting entire file layout in one setxattr (John Spray)
mds: fix shutdown (John Spray)
mds: handle misc corruption issues (John Spray)
mds: misc fixes (Jianpeng Ma, Dan van der Ster, Zhang Zhi)
mds: misc snap fixes (Zheng Yan)
mds: store layout on header object (#4161 John Spray)
misc performance and cleanup (Nathan Cutler, Xinxin Shu)
mon: add NOFORWARD, OBSOLETE, DEPRECATE flags for mon commands (Joao Eduardo Luis)
mon: add PG count to ‘ceph osd df’ output (Michal Jarzabek)
mon: clean up, reorg some mon commands (Joao Eduardo Luis)
mon: disallow >2 tiers (#11840 Kefu Chai)
mon: fix log dump crash when debugging (Mykola Golub)
mon: fix metadata update race (Mykola Golub)
mon: fix refresh (#11470 Joao Eduardo Luis)
mon: make blocked op messages more readable (Jianpeng Ma)
mon: only send mon metadata to supporting peers (Sage Weil)
mon: periodic background scrub (Joao Eduardo Luis)
mon: prevent pgp_num > pg_num (#12025 Xinxin Shu)
mon: reject large max_mds values (#12222 John Spray)
msgr: add ceph_perf_msgr tool (Hoamai Wang)
msgr: async: fix seq handling (Haomai Wang)
msgr: xio: fastpath improvements (Raju Kurunkad)
msgr: xio: sync with accellio v1.4 (Vu Pham)
osd: clean up temp object if promotion fails (Jianpeng Ma)
osd: constrain collections to meta and PGs (normal and temp) (Sage Weil)
osd: filestore: clone using splice (Jianpeng Ma)
osd: filestore: fix recursive lock (Xinxin Shu)
osd: fix dup promotion lost op bug (Zhiqiang Wang)
osd: fix temp-clearing (David Zafman)
osd: include a temp namespace within each collection/pgid (Sage Weil)
osd: low and high speed flush modes (Mingxin Liu)
osd: peer_features includes self (David Zafman)
osd: recovery, peering fixes (#11687 Samuel Just)
osd: require firefly features (David Zafman)
osd: set initial crush weight with more precision (Sage Weil)
osd: use a temp object for recovery (Sage Weil)
osd: use blkid to collection partition information (Joseph Handzik)
rados: add –striper option to use libradosstriper (#10759 Sebastien Ponce)
radosgw-admin: fix subuser modify output (#12286 Guce)
rados: handle –snapid arg properly (Abhishek Lekshmanan)
rados: improve bench buffer handling, performance (Piotr Dalek)
rados: new pool import implementation (John Spray)
rbd: fix link issues (Jason Dillaman)
rbd: improve CLI arg parsing, usage (Ilya Dryomov)
rbd: recognize queue_depth kernel option (Ilya Dryomov)
rbd: support G and T units for CLI (Abhishek Lekshmanan)
rbd: use image-spec and snap-spec in help (Vikhyat Umrao, Ilya Dryomov)
rest-bench: misc fixes (Shawn Chen)
rest-bench: support https (#3968 Yuan Zhou)
rgw: add max multipart upload parts (#12146 Abshishek Dixit)
rgw: add Trasnaction-Id to response (Abhishek Dixit)
rgw: document layout of pools and objects (Pete Zaitcev)
rgw: do not preserve ACLs when copying object (#12370 Yehuda Sadeh)
rgw: fix Connection: header handling (#12298 Wido den Hollander)
rgw: fix data corruptions race condition (#11749 Wuxingyi)
rgw: fix JSON response when getting user quota (#12117 Wuxingyi)
rgw: force content_type for swift bucket stats requests (#12095 Orit Wasserman)
rgw: improved support for swift account metadata (Radoslaw Zarzynski)
rgw: make max put size configurable (#6999 Yuan Zhou)
rgw: orphan detection tool (Yehuda Sadeh)
rgw: swift: do not override sent content type (#12363 Orit Wasserman)
rgw: swift: set Content-Length for account GET (#12158 Radoslav Zarzynski)
rpm: always rebuild and install man pages for rpm (Owen Synge)
rpm: misc fixes (Boris Ranto, Owen Synge, Ken Dreyer, Ira Cooper)
systemd: logrotate fixes (Tim Seron, Lars Marowsky-Bree, Nathan Cutler)
sysvinit compat: misc fixes (Owen Synge)
test: misc fs test improvements (John Spray, Loic Dachary)
test: python tests, linter cleanup (Alfredo Deza)

获取 CEPH

Git at git://github.com/ceph/ceph.git
Tarball at http://ceph.com/download/ceph-9.0.3.tar.gz
For packages, see http://ceph.com/docs/master/install/get-packages
For ceph-deploy, see http://ceph.com/docs/master/install/install-ceph-deploy

更多内容请看发行说明。

Ceph是加州大学Santa Cruz分校的Sage Weil（DreamHost的联合创始人）专为博士论文设计的新一代自由软件分布式文件系统。自2007年毕业之后，Sage开始全职投入到Ceph开发之中，使其能适用于生产环境。Ceph的主要目标是设计成基于POSIX的没有单点故障的分布式文件系统，使数据能容错和无缝的复制。2010年3 月，Linus Torvalds将Ceph client合并到内核2.6.34中。IBM开发者园地的一篇文章探讨了Ceph的架构，它的容错实现和简化海量数据管理的功能。

Ceph 中文文档：http://docs.openfans.org/ceph

Ceph 的 4 个模块：