During logical data set copy operations of SMS-managed VSAM data sets, DFSMSdss communicates with VSAM RLS to perform quiesce processing of data sets that are being accessed by another job using Record Level Sharing (RLS).

By default, DFSMSdss does not use timeout protection during RLS quiesce processing. You can control whether or not DFSMSdss uses timeout protection during RLS quiesce processing and what the timeout value should be using the DSSTIMEOUT parameter of the IGDSMSxx PARMLIB member.

You can also change the timeout value without IPLing the system using the SETSMS DSSTIMEOUT(nnnnn) command.

For more information about using IGDSMSxx to control the RLS timeout value used during DFSMSdss operations, refer toz/OS DFSMSdfp Storage Administration.

For more information about using the SETSMS command, refer toz/OS MVS System Commands.