Bug Fixes

• [TSDB] SinglePartitionPlanner bug preventing joins on raw and recording rules.
• [TSDB] InternalError shard(s?) should have dropped into "error" state and been reassigned
• [TSDB] Label-values query with !~ regex filters out too many results
• [TSDB] Compliance in behavior with Prometheus when != is used with a non existent label.
• [TSDB] Check for query timeouts in long-lived aggregations and joins so expensive queries are stopped in time.
• [TSDB] Fix metadata query routing when a regex filter is/isn’t given in the query.
• [TSDB] Make label-names api PromQL-compatible.
• [TSDB] Fix inconsistent results when binary joins operate on data both older and newer than now-7d.
• [TSDB] Failed Index lookup caused by large regex. Label regex now capped to 1 KB.

Performance enhancements

• [TSDB] Added support for stateful sets in FiloDB enabling faster shard recovery times by using block storage for index storage over container local storage.
• [TSDB] Label values query performance has been improved significantly with Lucene faceting. At high load, shard level latency for this query decreased from 5s to 16ms (300x).
• [TSDB] More performant label-values queries: queries for workspace and/or namespace values will now always bypass the storage engine when filters include only workspace and/or namespace labels.
• [TSDB] Optimization of binary joins by reducing data export when queried time range is beyond recent 7d.
• [TSDB] Track and log query stats for expensive queries. Future releases will enforce strict limits and block queries that scan/export large volume of data