Last week in scylla.git master (issue #139; 2022-07-24)

[Avi Kivity]

This short report brings to light some interesting commits to scylla.git master from the last weeks. Commits in the 4bfcead2ba..f46b207472 range are covered.

There were 128 non-merge commits from 14 authors in that period. Some notable commits:

User-defined aggregates can now have a REDUCEFUNC defined, allowing them to run in parallel on all shards and nodes. In addition, all native aggregates can now be parallelized (not just COUNT(*)), and multiple aggregations in a single SELECT statement are supported.

Scylla will now clean up the table directory skeleton when a table is dropped.

The compaction_static_shares and memtable_flush_static_shares configuration items, used to override the controllers, can now be updated without restarting the server.

It is now possible to limit I/O for repair and streaming to a user-defined bandwidth limit.

The repair watchdog interval has been increased, to reduce false failures on large clusters.

The CQL documentation was moved from the getting-started section to a new cql section.

Scylla propagates cache hit rate information through gossip, to allow coordinators to send less traffic to newly started node. It will now spend less effort to do so on large clusters.

See you in the next issue of last week in scylla.git master!