Fileshare can be configured a number of ways to run within an Enterprise Server region:
iFileshare
iFileshare (integrated Fileshare) is the version of Fileshare integrated with Enterprise Server, providing key aspects such as transactional support for CICS applications, and high availability for your VSAM datasets, as well as all the other features that come with Enterprise Server. We recommend that this configuration replaces existing configurations for Fileshare running under Enterprise Server.
Stand-alone Fileshare
Stand-alone Fileshare is a configuration within Enterprise Server that enables you to direct all I/O for CICS- or JCL-related files to a stand-alone Fileshare server, providing transactional VSAM file access for CICS-related files.