-----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Schwarz, Barry A Sent: Thursday, August 14, 2008 6:44 PM To: [email protected] Subject: Re: DASD Space Allocation
What is the LRECL, RECFM, and BLKSIZE? 4331 cylinders is 64,965 tracks. That averages to ~46 records per track. Is there some reason you think this is unreasonable? Don't think it's unreasonable, don't know what it has to do what is specified in JCL and what was allocated. What is the percentage used of the 4,331 cylinders? What is the device type the dataset is on? The dataset was allocated across 2 3390-9 volumes; 4 extents on the first volume with 100% utilization. If the initial allocation provided all 2500 cylinders in one extent, the remaining 1831 cylinders does require 19 extents so it at least that looks consistent. The initial allocation was in 4 extents. I thought for a PS file, the F1 DSCB gave 3 extent descriptors and the F3 DSCB gave another 13 extent descriptor for a total of 16 extents per volume. Please explain how 1831 cylinders requires 19 extents and that is consistent. -----Original Message----- From: William F Besnier [mailto:[EMAIL PROTECTED] Sent: Thursday, August 14, 2008 2:23 PM To: [email protected] Subject: DASD Space Allocation Situation came up on a client site where they received a very large file, 2.988 million records, and allocate the file size at (cyl,(2500,100)) with a unit parameter of sysda,10; the file is received across 2 volumes in 20 extents totaling 4,331 cylinders. I am not concerned about the extents, what I don't understand is the space allocation. ---------------------------------------------------------------------- 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
