At the risk of injecting a serious note into this levity, the Barry URL that I cited earlier seems to imply to me that 240K and 30 are hard-coded into B/QSAM somewhere:
"Experiments with BUFNO for Sequential Access (BSAM,QSAM), including that rare experiment of RTFM (Reading The Fine Manual), discovered that unstriped SAM is limited to transfer of 240K bytes per I/O, and is also limited to a maximum of 30 buffers." Just thinking out loud here, it would seem that if BUFNO is truly "limited" to 30 by DFHSM or whomever, then there is no need to worry about that number. Compute whatever number your preferred algorithm computes, and then stuff it in DCBBUFNO. If it's over 30, xSAM will make it 30. Maybe. I searched the DFHSM shelf on 240K and got no hits. Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Ted MacNEIL Sent: Friday, August 26, 2005 5:00 PM To: [email protected] Subject: Re: Most effective BUFNO? >Why 240K? Why not. Enquiring minds want to know! The bottom line is: the bottom line is always changing! IOW, today's guideline is tomorrow's (outdated) rule of thumb (WAG). It just happens that 200-240K works, now. There are many magic numbers in IT. ---------------------------------------------------------------------- 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
