![]() By default, old revisions are not removed. The journal in which cluster nodes write their changes can potentially become very large. To use a different value, set the attribute syncDelay in the cluster configuration. Sync Delayīy default, cluster nodes read the journal and update their state every 5 seconds (5000 milliseconds). ![]() A cluster id can be freely defined, the only requirement is that it has to be different on each cluster node. See below for some sample cluster configurations. When copying repository configurations, do not forget to adapt the cluster node IDs if they are hardcoded. This ID can be either specified in the cluster configuration as id attribute or as value of the system property .cluster.node_id. The persistence managers must store their data in the same, globally accessible location (see PersistenceManagerFAQ).Įvery cluster node needs a unique ID.Each cluster node must use the same (shared) journal.A journal type must be chosen, either based on files or stored in a database.Every cluster node must be assigned a unique ID.Each cluster node needs its own (private) Search indexes.Each cluster node needs its own (private) workspace level and version FileSystem (only those within the workspace and versioning configuration the ones in the repository.xml and workspace.xml file).The global FileSystem on the repository level must be shared (only the one that is on the same level as the data store only in the repository.xml file).A DataStore must always be shared between nodes, if used.Each cluster node must have its own repository configuration.In order to use clustering, the following prerequisites must be met: Session scoped locks currently have no effect on other cluster nodes - see Requirements However, each cluster node needs its own (private) repository directory, including repository.xml file, workspace FileSystem and Search index.Įvery change made by one cluster node is reported in a journal, which can be either file based or written to some database. central database that allows for concurrent access, see PersistenceManagerFAQ) any DataStore (file or DB) is clusterable by its very nature, as they store content by unique hash ids. The persistence manager must be clusterable (eg. That means all Jackrabbit cluster nodes need access to the *same* persistent storage (persistence manager, data store, and repository file system). Clustering in Jackrabbit works as follows: content is shared between all cluster nodes.
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