Thank you, Abi! And thanks to Stefan and Paulo for mentoring! On Fri, Aug 20, 2021 at 10:43 AM Paulo Motta <pa...@apache.org> wrote:
> Hi everyone, > > Just a heads up to the community that we're wrapping up the Google Summer > of Code project this year. > > Abi Palagashvili worked with us in the last couple of months to provide TTL > support to nodetool snapshots on CASSANDRA-16789 < > https://issues.apache.org/jira/browse/CASSANDRA-16789>, under mine and > Stefan Miklosovic's mentorship. We're in the final round of review before > merging the feature and welcome anyone who wants to take a look in the > final patch and give feedback. > > After this change is shipped in the next major release, clients can supply > an optional --ttl parameter during nodetool snapshot creation and Cassandra > will automatically clean up expired snapshots, avoiding the need for > external management of snapshot cleanup. > > During the process of adding this feature we identified several improvement > areas and started an effort to modernize the snapshot module by > centralizing snapshot lifecycle management on a SnapshotManager class, > which is responsible for keeping track of active snapshots in memory and > periodically cleaning them up when they expire. Right now we're only > managing "expiring" snapshots in this class, but we plan to migrate the > legacy snapshot lifecycle management to this class in follow-up tickets to > decouple it from the keyspace and table management classes. We > significantly increased the test coverage of the snapshot lifecycle and > added in-jvm tests to verify the feature. > > We plan to extend this feature before it's released on 4.1 by providing > support to pause/resume snapshot cleanup and also allow clients to supply > TTL to auto snapshots (those optionally created during truncation, table > drop or compaction), as well as integrate it with the ability of clearing > snapshots created since a specific date < > https://issues.apache.org/jira/browse/CASSANDRA-16860>. The parent task to > track future improvements in this area is CASSANDRA-16451 < > https://issues.apache.org/jira/browse/CASSANDRA-16451>. > > We thank Abi very much for his effort during the project and hope he stays > around in the community! > > Kind Regards, > > Paulo > -- Jonathan Ellis co-founder, http://www.datastax.com @spyced
