This release includes many bug fixes, several new features and updates:
- Write-only worker node: When worker nodes are added to the cluster via the JMX interface, they can be specified as being 'write-only'. These nodes will be kept in synch with the rest of the cluster, but will not take part in answering cluster queries. The motivation for this feature is to have one or more worker nodes available for batch processing of queries that do not affect the overall query performance of the cluster.
- Remote notifications: A new mechanism to complement the existing high-performance 'in-process' notification mechanism. This new mechanism allows clients to subscribe for the given statement patterns to OWLIM Replication Cluster master nodes.
- Online documentation: As well as the PDF format user guides included in the OWLIM distribution zip files, the latest documentation for all editions of OWLIM is now available online.
- Replication cluster introduced in this version of OWLIM: brings resilience, failover and horizontally scalable parallel query processing. A master node component is included that can manage a cluster of worker nodes (standard BigOWLIM instances) to synchronise updates, cater for node failure, dynamically add/remove worker nodes and distributed query requests. Such a setup allows for massive concurrent query performance where the number of queries processed per second scales almost linearly with the number of worker nodes