Turning off s/w compression in CICS & Db2 doesn't always work as advertised (meaning, it's not always better to turn off s/w compr and let h/w handle it). Uncompressed = more I/O for SMF processor tooling to handle. With either way of compressing, bytes stored will be around the same but the above was an added waste of CPU.
On Wednesday, April 17th, 2024 at 04:49, Andrew Rowley <[email protected]> wrote: > On 17/04/2024 7:52 am, Michael Oujesky wrote: > > > My current recommendation is to remove internal compression from CICS > > CMF (110/112) and DB2 (100-102) records, Zedc compress the SMF > > logstreams, then compress the logstream offloads via SMS zEDC > > compression. > > > Have you compared compressed size of zEDC with/without the CICS > compression? I have limited samples, but it looks like zEDC might > compress data better if it has been already been compressed by CICS. Of > course, there is the CPU time to consider. > > I think I/O can also be much faster for zEDC compressed data. > > -- > Andrew Rowley > Black Hill Software > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
