Hello, I am happy to announce release 0.22.0 of Hawkular Metrics. This release is anchored by performance and compression enhancements. Here is a list of major changes: - *Compression* - Prevent OutOfMemoryError on Cassandra when compression job runs ( HWKMETRICS-520 <https://issues.jboss.org/browse/HWKMETRICS-520>) - Avoid compression job executing in a loop when execution falls behind (HWKMETRICS-536 <https://issues.jboss.org/browse/HWKMETRICS-536>) - Avoid future executions of compression job from not running if Cassandra is shutdown abruptly (HWKMETRICS-518 <https://issues.jboss.org/browse/HWKMETRICS-518>) - Added a flag to disable the compression job; the data will be persisted and retrieved without compression (HWKMETRICS-524 <https://issues.jboss.org/browse/HWKMETRICS-524>) - The block size for compression is now configurable (HWKMETRICS-545 <https://issues.jboss.org/browse/HWKMETRICS-545>) - The compression job can now be triggered manually (HWKMETRICS-502 <https://issues.jboss.org/browse/HWKMETRICS-502>) - *Server Clustering* - The external alerter is now cluster-aware and will not process the same request on multiple nodes (HWKMETRICS-515 <https://issues.jboss.org/browse/HWKMETRICS-515>) - Schema updates are correctly applied when multiple servers are started at the same time (HWKMETRICS-514 <https://issues.jboss.org/browse/HWKMETRICS-514>) - Added Cassandra connection information to the status page and created an admin version with detailed Cassandra cluster information ( HWKMETRICS-526 <https://issues.jboss.org/browse/HWKMETRICS-526>) - Internal system metrics are now persisted under admin tenant; this gives a good overview of the current system load (HWKMETRICS-550 <https://issues.jboss.org/browse/HWKMETRICS-550>) - *REST API* - Added endpoint to allow fetching of available tag names ( HWKMETRICS-532 <https://issues.jboss.org/browse/HWKMETRICS-532>) - Fixed an issue where the API would report an internal server error on invalid query (HWKMETRICS-543 <https://issues.jboss.org/browse/HWKMETRICS-543>) - *Hawkular Alerting - Updates* - End to end performance enhancements - Major improvements to REST API documentation <http://www.hawkular.org/docs/rest/rest-alerts.html> - New cross-tenant endpoints for for fetching alerts - Email and webhook action plugins are now packaged in the main distribution (HWKMETRICS-552 <https://issues.jboss.org/browse/HWKMETRICS-552>) *Hawkular Alerting - included* - Version 1.4.0 <https://issues.jboss.org/projects/HWKALERTS/versions/12331986> - Project details and repository: Github <https://github.com/hawkular/hawkular-alerts> - Documentation: REST API Documentation <http://www.hawkular.org/docs/rest/rest-alerts.html>;, Examples <https://github.com/hawkular/hawkular-alerts/tree/master/examples>;, Developer Guide <http://www.hawkular.org/community/docs/developer-guide/alerts.html> *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/0.22.0 JBoss Nexus Maven artifacts: http://origin-repository.jboss.org/nexus/content/repositorie s/public/org/hawkular/metrics/ Jira release tracker: https://issues.jboss.org/projects/HWKMETRICS/versions/12332012 A big "Thank you" goes to John Sanda, Matt Wringe, Michael Burman, Joel Takvorian, Jay Shaughnessy, Lucas Ponce, and Heiko Rupp for their project contributions. Thank you, Stefan Negrea