There's a v0.18 release to match the latest posting of the kernel client
code on the Linux email lists. If there are no final issues there, that
will be what I send to Linus for 2.6.33.
Most of the changes since v0.17 are bug fixes in the MDS and kclient. The
main other item is an authentication framework to restrict access to the
cluster and it's services to authorized clients. Two protocols/schemes
are implemented: an AUTH_NONE framework that does no real authentication
(and is essentially equivalent to what we've had until now) and a
AUTH_CEPHX scheme that uses Kerberos-like tickets to mutually
authenticate clients and services.
Changes since v0.17 include:
- osd: basic ENOSPC handling
- big endian fixes (required protocol/disk format change)
- osd: improved object -> pg hash function; selectable
- crush: selectable hash function(s)
- mds restart bug fixes
- kclient: mds reconnect bug fixes
- fixed mds log trimming bug
- fixed mds cap vs snap deadlock
- filestore: faster flushing
- uclient,kclient: snapshot fixes
- mds: fix recursive accounting bug
- uclient: fixes for 32bit clients
- auth: 'none' security framework
- mon: "safely" bail on write errors (e.g. ENOSPC)
- mds: fix replay/reconnect race (caused (fast) client reconnect to fail)
- mds: misc journal replay, session fixes
There is a known memory leak in the MDS in this release. It should be
fixed in the unstable git shortly.
Looking forward, the main items are:
* stability
* fixing a few pressing MDS performance issues
* improving OSD interaction with btrfs (we may switch to using btrfs
snapshots in place of the user transaction ioctls)
* stability
Relevant URLs:
* Direct download at http://ceph.newdream.net/download/ceph-0.18.tar.gz
* For Debian packages see http://ceph.newdream.net/wiki/Debian
sage
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