Another three months have gone by, and the next stable release of Ceph is ready: Dumpling! Thank you to everyone who has contributed to this release (42 authors in all)!
This release focuses on a few major themes since v0.61 Cuttlefish:
- rgw: global namespace and region support for S3/Swift object storage
- new RESTful API endpoint for administering the cluster, based on a new and improved management API and updated CLI
- mon: stability and performance
- osd: stability performance
- cephfs: open-by-ino support (for improved NFS reexport)
- improved support for Red Hat platforms
- use of the Intel CRC32c instruction when available
As with previous stable releases, you can upgrade from previous versions of Ceph without taking the entire cluster online, as long as a few simple guidelines are followed.
- For Dumpling, we have tested upgrades from both Bobtail and Cuttlefish. If you are running Argonaut, please upgrade to Bobtail and then to Dumpling.
- Please upgrade daemons/hosts in the following order:
- Upgrade ceph-common on all nodes that will use the command line ‘ceph’ utility.
- Upgrade all monitors (upgrade ceph package, restart ceph-mon daemons). This can happen one daemon or host at a time. Note that because cuttlefish and dumpling monitors can’t talk to each other, all monitors should be upgraded in relatively short succession to minimize the risk that an a untimely failure will reduce availability.
- Upgrade all osds (upgrade ceph package, restart ceph-osd daemons). This can happen one daemon or host at a time.
- Upgrade radosgw (upgrade radosgw package, restart radosgw daemons).
There are several small compatibility changes between Cuttlefish and Dumpling, particularly with the CLI interface. Please see the complete release notes for a summary of the changes since v0.66 and v0.61 Cuttlefish, and other possible issues that should be considered before upgrading.
Dumpling is the second Ceph release on our new three-month stable release cycle. We are very pleased to have pulled everything together on schedule. The next stable release, which will be code-named Emperor, is slated for three months from now (beginning of November).
You can download v0.67 Dumpling from the usual locations: