FlowFile Repository

The FlowFile repository keeps track of the attributes and current state of each FlowFile in the system. By default, this repository is installed in the same root installation directory as all the other repositories; however, it is advisable to configure it on a separate drive if available.

There are currently three implementations of the FlowFile Repository, which are detailed below.


Property	Description
`nifi.flowfile.repository.implementation`	The FlowFile Repository implementation. The default value is `org.apache.nifi.controller.repository.WriteAheadFlowFileRepository`. The other current options are `org.apache.nifi.controller.repository.VolatileFlowFileRepository` and `org.apache.nifi.controller.repository.RocksDBFlowFileRepository`.

	Note
	Switching repository implementations should only be done on an instance with zero queued FlowFiles, and should only be done with caution.