Distributed Cache

OrientDB has own more Cache levels. When OrientDB runs in Distributed-Architecture, each server has own cache. All the caches in each server are independent.

Distributed 2nd Level cache

You can also have a shared cache among servers, by enabling the Hazelcast's 2nd level cache. To enable it set the cache.level2.impl property in orientdb-dserver-config.xml file with value com.orientechnologies.orient.server.hazelcast.OHazelcastCache:

Note that this will slow down massive insertion but will improve query and lookup operations.

Example in orientdb-dserver-config.xml file:

...
<properties>
  <!-- Uses the Hazelcast distributed cache as 2nd level cache -->
  <entry name="cache.level2.impl" value="com.orientechnologies.orient.server.hazelcast.OHazelcastCache" />
</properties>