分布式文件系統，Ceph v0.92 發布

jopen 9年前發布 | 8K 次閱讀 Ceph

Ceph是加州大學Santa Cruz分校的Sage Weil（DreamHost的聯合創始人）專為博士論文設計的新一代自由軟件分布式文件系統。自2007年畢業之后，Sage開始全職投入到Ceph開發之中，使其能適用于生產環境。Ceph的主要目標是設計成基于POSIX的沒有單點故障的分布式文件系統，使數據能容錯和無縫的復制。2010年3 月，Linus Torvalds將Ceph client合并到內核2.6.34中。IBM開發者園地的一篇文章探討了Ceph的架構，它的容錯實現和簡化海量數據管理的功能。

Ceph v0.92 發布，此版本主要改進如下：

OSD 對象校驗
緩存層讀入代理
RBD 圖片鎖
優化 OSD 事物和復制信息
大量的 RGW 和 MDS bug 修復

升級

The experimental ‘keyvaluestore-dev’ OSD backend has been renamed ‘keyvaluestore’ (for simplicity) and marked as experimental.
The following librados C API function calls take a ‘flags’ argument whose value is now correctly interpreted:

rados_write_op_operate() rados_aio_write_op_operate() rados_read_op_operate() rados_aio_read_op_operate()
The ‘rados’ CLI ‘copy’ and ‘cppool’ commands now use the copy-from operation
The librados watch/notify API now includes a watch_flush() operation to flush the async queue of notify operations.

值得關注的改進

add experimental features option (Sage Weil)
build: fix ‘make check’ races (#10384 Loic Dachary)
build: fix pkg names when libkeyutils is missing (Pankag Garg, Ken Dreyer)
ceph: make ‘ceph -s’ show PG state counts in sorted order (Sage Weil)
ceph: make ‘ceph tell mon.* version’ work (Mykola Golub)
ceph-monstore-tool: fix/improve CLI (Joao Eduardo Luis)
ceph: show primary-affinity in ‘ceph osd tree’ (Mykola Golub)
common: add TableFormatter (Andreas Peters)
common: check syncfs() return code (Jianpeng Ma)
doc: do not suggest dangerous XFS nobarrier option (Dan van der Ster)
doc: misc updates (Nilamdyuti Goswami, John Wilkins)
install-deps.sh: do not require sudo when root (Loic Dachary)
libcephfs: fix dirfrag trimming (#10387 Yan, Zheng)
libcephfs: fix mount timeout (#10041 Yan, Zheng)
libcephfs: fix test (#10415 Yan, Zheng)
libcephfs: fix use-afer-free on umount (#10412 Yan, Zheng)
libcephfs: include ceph and git version in client metadata (Sage Weil)
librados: add watch_flush() operation (Sage Weil, Haomai Wang)
librados: avoid memcpy on getxattr, read (Jianpeng Ma)
librados: create ioctx by pool id (Jason Dillaman)
librados: do notify completion in fast-dispatch (Sage Weil)
librados: remove shadowed variable (Kefu Chain)
librados: translate op flags from C APIs (Matthew Richards)
librbd: differentiate between R/O vs R/W features (Jason Dillaman)
librbd: exclusive image locking (Jason Dillaman)
librbd: fix write vs import race (#10590 Jason Dillaman)
librbd: gracefully handle deleted/renamed pools (#10270 Jason Dillaman)
mds: asok command for fetching subtree map (John Spray)
mds: constify MDSCacheObjects (John Spray)
misc: various valgrind fixes and cleanups (Danny Al-Gaaf)
mon: fix ‘mds fail’ for standby MDSs (John Spray)
mon: fix stashed monmap encoding (#5203 Xie Rui)
mon: implement ‘fs reset’ command (John Spray)
mon: respect down flag when promoting standbys (John Spray)
mount.ceph: fix suprious error message (#10351 Yan, Zheng)
msgr: async: many fixes, unit tests (Haomai Wang)
msgr: simple: retry binding to port on failure (#10029 Wido den Hollander)
osd: add fadvise flags to ObjectStore API (Jianpeng Ma)
osd: add get_latest_osdmap asok command (#9483 #9484 Mykola Golub)
osd: EIO on whole-object reads when checksum is wrong (Sage Weil)
osd: filejournal: don’t cache journal when not using direct IO (Jianpeng Ma)
osd: fix ioprio option (Mykola Golub)
osd: fix scrub delay bug (#10693 Samuel Just)
osd: fix watch reconnect race (#10441 Sage Weil)
osd: handle no-op write with snapshot (#10262 Sage Weil)
osd: journal: fix journal zeroing when direct IO is enabled (Xie Rui)
osd: keyvaluestore: cleanup dead code (Ning Yao)
osd, mds: ‘ops’ as shorthand for ‘dump_ops_in_flight’ on asok (Sage Weil)
osd: memstore: fix size limit (Xiaoxi Chen)
osd: misc scrub fixes (#10017 Loic Dachary)
osd: new optimized encoding for ObjectStore::Transaction (Dong Yuan)
osd: optimize filter_snapc (Ning Yao)
osd: optimize WBThrottle map with unordered_map (Ning Yao)
osd: proxy reads during cache promote (Zhiqiang Wang)
osd: proxy read support (Zhiqiang Wang)
osd: remove legacy classic scrub code (Sage Weil)
osd: remove unused fields in MOSDSubOp (Xiaoxi Chen)
osd: replace MOSDSubOp messages with simpler, optimized MOSDRepOp (Xiaoxi Chen)
osd: store whole-object checksums on scrub, write_full (Sage Weil)
osd: verify kernel is new enough before using XFS extsize ioctl, enable by default (#9956 Sage Weil)
rados: use copy-from operation for copy, cppool (Sage Weil)
rgw: change multipart upload id magic (#10271 Yehuda Sadeh)
rgw: decode http query params correction (#10271 Yehuda Sadeh)
rgw: fix content length check (#10701 Axel Dunkel, Yehuda Sadeh)
rgw: fix partial GET in swift (#10553 Yehuda Sadeh)
rgw: fix shutdown (#10472 Yehuda Sadeh)
rgw: include XML ns on get ACL request (#10106 Yehuda Sadeh)
rgw: misc fixes (#10307 Yehuda Sadeh)
rgw: only track cleanup for objects we write (#10311 Yehuda Sadeh)
rgw: tweak error codes (#10329 #10334 Yehuda Sadeh)
rgw: use gc for multipart abort (#10445 Aaron Bassett, Yehuda Sadeh)
sysvinit: fix race in ‘stop’ (#10389 Loic Dachary)
test: fix bufferlist tests (Jianpeng Ma)
tests: improve docker-based tests (Loic Dachary)