18.3. Cache Store Configuration Details (Remote Client-Server Mode)

The following tables contain details about the configuration elements and parameters for cache store elements in JBoss Data Grid's Remote Client-Server mode:
The local-cache Element

  • The name parameter of the local-cache attribute is used to specify a name for the cache.
  • The statistics parameter specifies whether statistics are enabled at the container level. Enable or disable statistics on a per-cache basis by setting the statistics attribute to false.
The file-store Element

  • The name parameter of the file-store element is used to specify a name for the file store.
  • The passivation parameter determines whether entries in the cache are passivated (true) or if the cache store retains a copy of the contents in memory (false).
  • The purge parameter specifies whether or not the cache store is purged when it is started. Valid values for this parameter are true and false.
  • The shared parameter is used when multiple cache instances share a cache store. This parameter can be set to prevent multiple cache instances writing the same modification multiple times. Valid values for this parameter are true and false. However, the shared parameter is not recommended for the LevelDB cache store because this cache store cannot be shared.
  • The relative-to property is the directory where the file-store stores the data. It is used to define a named path.
  • The path property is the name of the file where the data is stored. It is a relative path name that is appended to the value of the relative-to property to determine the complete path.
  • The maxEntries parameter provides maximum number of entries allowed. The default value is -1 for unlimited entries.
  • The fetch-state parameter when set to true fetches the persistent state when joining a cluster. If multiple cache stores are chained, only one of them can have this property enabled. Persistent state transfer with a shared cache store does not make sense, as the same persistent store that provides the data will just end up receiving it. Therefore, if a shared cache store is used, the cache does not allow a persistent state transfer even if a cache store has this property set to true. It is recommended to set this property to true only in a clustered environment. The default value for this parameter is false.
  • The preload parameter when set to true, loads the data stored in the cache store into memory when the cache starts. However, setting this parameter to true affects the performance as the startup time is increased. The default value for this parameter is false.
  • The singleton parameter enables a singleton store cache store. SingletonStore is a delegating cache store used when only one instance in a cluster can interact with the underlying store. However, singleton parameter is not recommended for file-store.
The store Element

  • The class parameter specifies the class name of the cache store implementation.
The property Element

  • The name parameter specifies the name of the property.
  • The value parameter specifies the value assigned to the property.
The remote-store Element

  • The cache parameter defines the name for the remote cache. If left undefined, the default cache is used instead.
  • The socket-timeout parameter sets whether the value defined in SO_TIMEOUT (in milliseconds) applies to remote Hot Rod servers on the specified timeout. A timeout value of 0 indicates an infinite timeout. The default value is 60,000 ms, or one minute.
  • The tcp-no-delay sets whether TCP_NODELAY applies on socket connections to remote Hot Rod servers.
  • The hotrod-wrapping sets whether a wrapper is required for Hot Rod on the remote store.
The remote-server Element

  • The outbound-socket-binding parameter sets the outbound socket binding for the remote server.
The binary-keyed-jdbc-store, string-keyed-jdbc-store, and mixed-keyed-jdbc-store Elements

  • The datasource parameter defines the name of a JNDI for the datasource.
  • The passivation parameter determines whether entries in the cache are passivated (true) or if the cache store retains a copy of the contents in memory (false).
  • The preload parameter specifies whether to load entries into the cache during start up. Valid values for this parameter are true and false.
  • The purge parameter specifies whether or not the cache store is purged when it is started. Valid values for this parameter are true and false.
  • The shared parameter is used when multiple cache instances share a cache store. This parameter can be set to prevent multiple cache instances writing the same modification multiple times. Valid values for this parameter are true and false.
  • The singleton parameter enables a singleton store cache store. SingletonStore is a delegating cache store used when only one instance in a cluster can interact with the underlying store
The binary-keyed-table and string-keyed-table Elements

  • The prefix parameter specifies a prefix string for the database table name.
The id-column, data-column, and timestamp-column Elements

  • The name parameter specifies the name of the database column.
  • The type parameter specifies the type of the database column.
The leveldb-store Element

  • The relative-to parameter specifies the base directory to store the cache state. This value defaults to jboss.server.data.dir.
  • The path parameter defines where, within the directory specified in the relative-to parameter, the cache state is stored. If undefined, the path defaults to the cache container name.
  • The passivation parameter specifies whether passivation is enabled for the LevelDB cache store. Valid values are true and false.
  • The purge parameter specifies whether the cache store is purged when it starts up. Valid values are true and false.
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