Enterprise Vault 8.0 SP4 uses a server cache on each Enterprise Vault server, as follows:
There is now a minimum size of 10 GB for the server Cache location and the default size is 20 GB.
You must set a server cache location for each Enterprise Vault server if you intend to use Vault Cache or if you use a Celerra device with Enterprise Vault.
The Vault Service account must have read and write access to the location you select.
Because anti-virus software can potentially change data in the cache, it is important to exclude the cache location in your virus checking application.
Note that the changes you make on a server do not take effect until the next restart of the Admin service on that server.