Hi, Can write sth more about new key/value api or point part of the source where we can get familiar with it. On Wed, Mar 21, 2012 at 2:39 PM, Sage Weil <sage@xxxxxxxxxxxx> wrote: > v0.44 is ready! Changes since v0.43 include: > > * osd: key/value objects (objects are now blobs, key/value bundles, and > xattrs) > * osd: cleaned up PG state, stats > * osd: fixed transaction replay on non-btrfs after ill-timed failures > * osd: several recovery fixes > * radosgw: improved PUT performance > * radosgw: improved list objects performance, filtering > * radosgw: manifests for large objects > * radosgw: Swift/S3 ACL interoperability (last set ACL type wins) > * librados: new key/value object API > * Ubuntu 12.04 precise packages > > The exciting part of this release is that the key/value "object map" > work has been merged, along with radosgw changes to take advantage of the > new API. This allows you to use a key/value interface to manage many > small records in a single object, in addition of the regular object data > and attributes. Keys in the same object are stored together on disk--just > like object data would be--so there are locality advantages to putting > related keys in the same object. However, there are no limits on how many > keys per object beyond concerns about load and space balancing (all keys > in an object are stored together on the same set of Ceph OSDs). This > provides an interesting alternative to conventional distributed key/value > stores like Cassandra that distribute all keys in a single namespace > across all nodes. For example, radosgw now uses the new object map API to > manage the index object for each bucket. > > For v0.45, we're continuing work on RBD caching, performance and bug > fixes, and working around xattr size limitations in ext3/4. > > You can get v0.44 from the usual locations: > > * Git at git://github.com/ceph/ceph.git > * Tarball at http://ceph.newdream.net/download/ceph-0.44.tar.gz > * For Debian/Ubuntu packages, see > http://ceph.newdream.net/docs/master/ops/install/mkcephfs/#installing-the-packages > > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Tomasz Paszkowski SS7, Asterisk, SAN, Datacenter, Cloud Computing +48500166299 -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
