Yes, we implemented it several years ago. Our default Dataclas for VSAM files contains:
Data Set Name Type . . . . . : EXTENDED If Extended . . . . . . . . : REQUIRED Extended Addressability . . : YES Record Access Bias . . . . : SYSTEM System Managed Buffer . . . : System Determined Blocksize : YES We do not specify a value in the SMB field. We could see performance improved, but I don't recall (and didn't document, apparently) what the measured improvement was. Greg Shirey Ben E. Keith Co. -----Original Message----- From: IBM Mainframe Discussion List On Behalf Of Tobias Cafiero Sent: Tuesday, September 14, 2010 11:44 AM 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. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html