Hello, first of all, congratulations to Inktank and thank you for your awesome work! Although exploiting native f2fs abilities, as with btrfs, sounds awesome for a matter of performance, I wonder when kv db is able to practically give users with 'legacy' file systems ability to conduct CoW operations as fast as on the log-based fs, with small or no performance impact, what`s the primary idea behind introducing interface bounded to the specific filesystem in same time? Of course I believe that f2fs will outperform almost every competitor at its field - non-rotating media operations, but I would be grateful if someone can shed light on this development choice. On Wed, May 7, 2014 at 5:05 AM, Sage Weil <sage at inktank.com> wrote: > We did it! Firefly v0.80 is built and pushed out to the ceph.com > repositories. > > This release will form the basis for our long-term supported release > Firefly, v0.80.x. The big new features are support for erasure coding > and cache tiering, although a broad range of other features, fixes, > and improvements have been made across the code base. Highlights include: > > * *Erasure coding*: support for a broad range of erasure codes for lower > storage overhead and better data durability. > * *Cache tiering*: support for creating 'cache pools' that store hot, > recently accessed objects with automatic demotion of colder data to > a base tier. Typically the cache pool is backed by faster storage > devices like SSDs. > * *Primary affinity*: Ceph now has the ability to skew selection of > OSDs as the "primary" copy, which allows the read workload to be > cheaply skewed away from parts of the cluster without migrating any > data. > * *Key/value OSD backend* (experimental): An alternative storage backend > for Ceph OSD processes that puts all data in a key/value database like > leveldb. This provides better performance for workloads dominated by > key/value operations (like radosgw bucket indices). > * *Standalone radosgw* (experimental): The radosgw process can now run > in a standalone mode without an apache (or similar) web server or > fastcgi. This simplifies deployment and can improve performance. > > We expect to maintain a series of stable releases based on v0.80 > Firefly for as much as a year. In the meantime, development of Ceph > continues with the next release, Giant, which will feature work on the > CephFS distributed file system, more alternative storage backends > (like RocksDB and f2fs), RDMA support, support for pyramid erasure > codes, and additional functionality in the block device (RBD) like > copy-on-read and multisite mirroring. > > This release is the culmination of a huge collective effort by about 100 > different contributors. Thank you everyone who has helped to make this > possible! > > Upgrade Sequencing > ------------------ > > * If your existing cluster is running a version older than v0.67 > Dumpling, please first upgrade to the latest Dumpling release before > upgrading to v0.80 Firefly. Please refer to the :ref:`Dumpling upgrade` > documentation. > > * Upgrade daemons in the following order: > > 1. Monitors > 2. OSDs > 3. MDSs and/or radosgw > > If the ceph-mds daemon is restarted first, it will wait until all > OSDs have been upgraded before finishing its startup sequence. If > the ceph-mon daemons are not restarted prior to the ceph-osd > daemons, they will not correctly register their new capabilities > with the cluster and new features may not be usable until they are > restarted a second time. > > * Upgrade radosgw daemons together. There is a subtle change in behavior > for multipart uploads that prevents a multipart request that was initiated > with a new radosgw from being completed by an old radosgw. > > Notable changes since v0.79 > --------------------------- > > * ceph-fuse, libcephfs: fix several caching bugs (Yan, Zheng) > * ceph-fuse: trim inodes in response to mds memory pressure (Yan, Zheng) > * librados: fix inconsistencies in API error values (David Zafman) > * librados: fix watch operations with cache pools (Sage Weil) > * librados: new snap rollback operation (David Zafman) > * mds: fix respawn (John Spray) > * mds: misc bugs (Yan, Zheng) > * mds: misc multi-mds fixes (Yan, Zheng) > * mds: use shared_ptr for requests (Greg Farnum) > * mon: fix peer feature checks (Sage Weil) > * mon: require 'x' mon caps for auth operations (Joao Luis) > * mon: shutdown when removed from mon cluster (Joao Luis) > * msgr: fix locking bug in authentication (Josh Durgin) > * osd: fix bug in journal replay/restart (Sage Weil) > * osd: many many many bug fixes with cache tiering (Samuel Just) > * osd: track omap and hit_set objects in pg stats (Samuel Just) > * osd: warn if agent cannot enable due to invalid (post-split) stats (Sage Weil) > * rados bench: track metadata for multiple runs separately (Guang Yang) > * rgw: fixed subuser modify (Yehuda Sadeh) > * rpm: fix redhat-lsb dependency (Sage Weil, Alfredo Deza) > > For the complete release notes, please see: > > http://ceph.com/docs/master/release-notes/#v0-80-firefly > > > Getting Ceph > ------------ > > * Git at git://github.com/ceph/ceph.git > * Tarball at http://ceph.com/download/ceph-0.80.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 >
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