VSAM File Sharing With CA-L-Serv › How to Customize CA-L-Serv for CA TPX › Propagate ENQs

Propagate ENQs

The following ENQs must be propagated across all systems that share the DASD on which the managed files reside:

• The LSERVDSN ENQ. This is issued by CA-L-Serv against a VSAM file when the file is placed under CA-L-Serv management with an ADDFILE command. This ENQ is used to determine whether CA-L-Serv is managing the file.
• The SYSVSAM ENQ. This is issued by VSAM when a VSAM OPEN takes place. Share options of (1,3) or (2,3) use this ENQ to restrict update access to the file.
• The SYSDSN ENQ. This is issued by z/OS when an OPEN takes place against a data set that is coded DISP=OLD.

You can use a product that propagates ENQ requests globally, such as CA MII Data Sharing. Your site probably already has methods to propagate the SYSVSAM and SYSDSN ENQs.