FCDSRNGE

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FCDSRNGE

A resource name of FCDSRNGE indicates a wait for range lock in a recoverable KSDS file.

When a transaction issues a mass-insert WRITE request to a recoverable KSDS data set, CICS obtains exclusive control of a range of key values. This enables CICS to perform an efficient sequential write operation, while maintaining integrity. The range extends to the next higher key in the data set.

If another transaction tries to write a record in the locked key range, or delete the record at the end of the range, it is suspended until the range lock is released. The lock is released when the transaction holding it issues a syncpoint, ends the mass-insert operation by issuing an UNLOCK, or changes to a different range.