Ceph 9.0.3 发布，分布式文件系统

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　　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’. Thereis no need to deprecate this command (same major>
  
• 　　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 thelisted 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>
  
• 　　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>
  
• 　　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。
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