Hello Everybody, I am happy to announce release 0.19.0 of Hawkular Metrics.This release is anchored by performance enhancements and a lot of REST API enhancements. Here is a list of major changes: 1. *REST API - Query Improvements* - It is now possible to use relative timestamps when querying for data via `+` or `-` added to timestamp parameters. When used, the timestamp is relative to the local system timestamp (HWKMETRICS-358 <https://issues.jboss.org/browse/HWKMETRICS-358>;, HWKMETRICS-457 <https://issues.jboss.org/browse/HWKMETRICS-457>) - Querying for data from earliest available data point has been expanded to raw data queries for gauges and counters (HWKMETRICS-435 <https://issues.jboss.org/browse/HWKMETRICS-435>) - `DELETE tenants/{id}` has been added to allow the deletion of an entire tenant (HWKMETRICS-446 <https://issues.jboss.org/browse/HWKMETRICS-446>) - AvailabilityType is serialized as simple string in bucket data points (HWKMETRICS-436 <https://issues.jboss.org/browse/HWKMETRICS-436>) 2. *Performance Enhancements* - The write performance has been increased by 10% across the board after reorganizing the meta-data internal indexes. (HWKMETRICS-422 <https://issues.jboss.org/browse/HWKMETRICS-422>) - GZIP replaced LZ4 as the compression algorithm for the data table. This produces anywhere between 60% to 70% disk usage savings over LZ4. ( HWKMETRICS-454 <https://issues.jboss.org/browse/HWKMETRICS-454>) 3. *Job Scheduler - Improvements* - The newly introduced internal job scheduler received several improvements and fixes; the main focus was to enhance the scalability and fault tolerance. - The job scheduler will be used only for internal tasks. - For more details: HWKMETRICS-221 <https://issues.jboss.org/browse/HWKMETRICS-221>;, HWKMETRICS-451 <https://issues.jboss.org/browse/HWKMETRICS-451>;, HWKMETRICS-453 <https://issues.jboss.org/browse/HWKMETRICS-453>;, HWKMETRICS-94 <https://issues.jboss.org/browse/HWKMETRICS-94> *Hawkular Metrics Clients* - Python: https://github.com/hawkular/hawkular-client-python - Go: https://github.com/hawkular/hawkular-client-go - Ruby: https://github.com/hawkular/hawkular-client-ruby - Java: https://github.com/hawkular/hawkular-client-java *Release Links* Github Release: https://github.com/hawkular/hawkular-metrics/releases/tag/0.19.0 JBoss Nexus Maven artifacts: http://origin-repository.jboss.org/nexus/content/repositories/public/org/... Jira release tracker: https://issues.jboss.org/browse/HWKMETRICS/fixforversion/12331192 A big "Thank you" goes to John Sanda, Thomas Segismont, Mike Thompson, Matt Wringe, Michael Burman, Joel Takvorian, and Heiko Rupp for their project contributions. Thank you, Stefan Negrea