Tobias, The reason you are not seeing the expected savings is that the IDCAMS REPRO has already set and used the optimal number of data buffers regardless of the DATACLAS change (so, no change has actually taken place; optimal buffering was used for both before and after runs).
You should see the savings when programs that are not taking care of their VSAM buffering start using these data sets. I too think that 1MB is a bit constrictive for direct access LSR (bias=do) buffering. Best Regards, Yifat -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Tobias Cafiero Sent: יום ג 14 ספטמבר 2010 18:44 To: [email protected] Subject: DFSMS and System Managed Buffering Hello, I'm testing the SMB option in the DFSMS DATACLS Constructs, but don't yet see a performance boost as promised. At this point I'm using just a del/define,repro and pointing to the SMB DATACLS. The DATACLS is extended and contains the following values: Record Access Bias . . . . : SYSTEM System Managed Buffer . . . : 1M The STORCLS is our standard non-striped type. Has anyone implemented SMB on their system. Thanks in Advance Tobias Cafiero ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- 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
