Re: v0.44 released

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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
>
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-- 
Tomasz Paszkowski
SS7, Asterisk, SAN, Datacenter, Cloud Computing
+48500166299
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