DFHFCVS
DFHFCVS is the CICS file control program that provides file services for application programs and for other CICS modules. DFHFCVS is called by DFHFCP and performs the following functions:
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Acquiring and releasing of the file storage by storage control
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Communicating with files defined in the file control table
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Logging of changes to these files by DFHFCJL and journal control
DFHFCVS handles requests that access data in VSAM files. It also services requests for both CICS-maintained and user-maintained tables. Requests that access BDAM data are passed to DFHFCBD.
Reference Sources
CICS Transaction Server for z/OS Diagnosis Reference