The Encryption Facility can use HW-based compression before encryption, all on the server. (One has to specify its use because there is no way to uncompress the data on a non-z server.)
??? the hardware compression (CPACF) has been available on all systems for many years and generations, long before zSeries. I am sure it is available on any system which is still in use. Even if it wasn't there, the op system contains software emulation (at a CPU price, of course).
I think the main reason that compression is optional is for data that is already compressed or naturally incompressible; compress CPU time goes up on such data as it tries to find ways to compress it
-- Bruce Black Senior Software Developer Innovation Data Processing ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
