Using CA Tape Encryption in Your z/OS Environment › Integrated Compression for Symmetric Key Encryption › Compression Threshold › Set the Compression Threshold

Previous Topic: How Compression Threshold Monitoring Works

Next Topic: CA Compress Equivalent Compression Methods

Set the Compression Threshold

Use the MinimumCompressionRate attribute to specify a compression threshold for checking to see if compression meets your target compression rate. You can specify this attribute in the dynamic options to apply it to all files that will be encrypted. If you want to specify the Compression= value selectively for symmetric keys, you must specify Compression=K for the dynamic member of parmlib. If you specify Compression=K in the dynamic member of parmlib to control compression at the key level, then a symmetric key that specifies the Compression= attribute but does not specify the MinimumCompressionRate= attribute will use the minimum compression rate value specified in the dynamic member.

To set the compression threshold

Specify the following option to set a minimum compression rate:

MinimumCompressionRate=nn
nn

Indicates the percentage of bytes to remove from the file by compression, from 0 through 99.

Default: 50