This short report brings to light some interesting commits to scylladb.git master from the last week. Commits in the e18a855abe…afee3924b3 range are covered.
There were 69 non-merge commits from 15 authors in that period. Some notable commits:
When tablet metadata (system.tablets table) changes, we now reload only the changed rows.
A bug when ALTERing a keyspace that doesn’t exist, with tablets, was fixed.
Reversed queries (WITH CLUSTERING ORDER BY) are already quite efficient in ScyllaDB, yet the wire protocol between nodes was kept unaware of reversed queries in order to maintain compatibility; result sets were un-reversed before sending over the wire, then re-reversed. We now support an alternate protocol where these wasteful transformations are avoided.
A regression in processing limits for the GROUP BY clause was fixed.
Service levels are used to group and classify sessions. Service level names beginning with $ are now reserved.
See you in the next issue of last week in scylladb.git master!