Terracotta DB 10.2 | Ehcache API Developer Guide | Fast Restartability | General Notes on Configuring Restartability
 
General Notes on Configuring Restartability
*A restartable CacheManager must be supplied with a data directory name using the restartable(<data-root-identifier>) API. If not, the CacheManager would be created as a non-restartable CacheManager.
Refer to the topic Data Directories in the section Configuring the Terracotta Server for more details.
*The data directory name specified at CacheManager should be any one of the data directories specified in the server configuration. For example, if a server is configured with data directories root1, root2 and root3, a CacheManager could be supplied any one of these three data directories. If the data directory specified in the CacheManager configuration does not match the data directory specified in server configuration, the following Exception is thrown.
org.terracotta.entity.ConfigurationException:
Given identifier (specified_directory) is not present in the server's configuration;
Cannot configure Fast Restart Store for clustered tier manager
(specified_cache_manager) due to invalid configuration specified by client.
*As with a non-restartable CacheManager, the server resource supplied in the defaultServerResource API should exist in the Terracotta Server configuration.
*As should be obvious, the specified pool size shouldn't exceed the server resource size.
*Different clients who want to connect to the same CacheManager should use the exact same configuration. Once CacheManager is created, any subsequent attempts to create the same CacheManager with a different configuration will fail.

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