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DFSRRHMP

DFSRRHMP (in source module DFSRRHM0) is a CSECT within the DL/I space management load module DFSDHDS0. It searches a given range in a bitmap for a block with a bit on that indicates there is room for the maximum size segment in the block. Starting from a point in the bitmap, it scans in both directions and attempts to find the optimal block. If necessary DFSRRHMP will extend the dataset.

Hints

For performance considerations for CSECT DFSRRHMP, please refer to module DFSDHDS0.

Reference Sources

More information is available in the DBSOURCE Library Data Set. See your IMS systems programmer.