Supported Execution Parameters

The TBECMPCA utility supports the following execution parameters:

COMP=xx: Specifies any valid compression algorithm (S0 through H5). If an algorithm is specified, analysis is limited to that specified compression algorithm. If no algorithm is specified, all compression algorithms are tested..
STOPAFTER=nnnnnnnn: Specifies the number of data blocks to analyze. If the file contains more blocks than the number specified, the analysis stops when this limit is reached.
DIAG: Specifies that blocks of diagnostic data are written to the DIAGMSG and DIAGSNAP DD statements. Use this parameter only if directed to do so by CA Technical Support.
NOCOMP: Specifies that the data set will not be compressed. This parameter is useful for determining the overhead involved because of TBECMPCA simply reading the data set.
READTOEOF: Specifies that TBECMPCA is not to stop processing after it has processed 24 MB. TBECMPCA normally stops after processing 24 MB because the realtime process checks for the minimum compression rate after 24 MB, so TBECMPCA shows what the rate for the current dataset would be at 24 MB. Use this parameter for files that may have poorly compressible data in the first 24 MB, but very compressible data elsewhere in the file. This parameter does not override the STOPAFTER parameter.