Problem Going to VSAM from IAM

2012-07-19 Thread Brown, Larry - RD, St. Louis, MO
Hello, we have a job that was previously using Innovation's IAM file access method. The file is over 6 million records. The job runs twice yearly and usually takes an hour or less to complete. The product was removed to save on SW costs, and the file was converted to VSAM. The programmer

Re: Problem Going to VSAM from IAM

2012-07-19 Thread Yifat Oren
[mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Brown, Larry - RD, St. Louis, MO Sent: Thursday, July 19, 2012 3:22 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Problem Going to VSAM from IAM Hello, we have a job that was previously using Innovation's IAM file access method. The file is over 6 million

Re: Problem Going to VSAM from IAM

2012-07-19 Thread Joel C. Ewing
@LISTSERV.UA.EDU Subject: Problem Going to VSAM from IAM Hello, we have a job that was previously using Innovation's IAM file access method. The file is over 6 million records. The job runs twice yearly and usually takes an hour or less to complete. The product was removed to save on SW costs

Re: Problem Going to VSAM from IAM

2012-07-19 Thread Brown, Larry - RD, St. Louis, MO
: Problem Going to VSAM from IAM From original post, the job in question is only reading the file. Any updates are done elsewhere, which at this point haven't yet been described as a performance issue. BLSR Deferred writes could be useful in other cases (not here) when a large number of updates

Re: Problem Going to VSAM from IAM

2012-07-19 Thread Joel C. Ewing
- From: Brown, Larry - RD, St. Louis, MO [mailto:larry.bro...@stl.usda.gov] Sent: Thursday, July 19, 2012 8:22 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Problem Going to VSAM from IAM Hello, we have a job that was previously using Innovation's IAM file access method. The file is over 6 million

Re: Problem Going to VSAM from IAM

2012-07-19 Thread Brown, Larry - RD, St. Louis, MO
: Re: Problem Going to VSAM from IAM Larry, Your dd statement specifies space for 100 data buffers (4096 x 100 =409600) but you then specify bufnd=181, which is one cyl for a 4096 CI size, plus Bufni=9. I would lose the bufsp parameter and let VSAM allocate buffers according to the Bufnd

Re: Problem Going to VSAM from IAM

2012-07-19 Thread McKown, John
-MAIN@LISTSERV.UA.EDU Subject: Re: Problem Going to VSAM from IAM Larry, Your dd statement specifies space for 100 data buffers (4096 x 100 =409600) but you then specify bufnd=181, which is one cyl for a 4096 CI size, plus Bufni=9. I would lose the bufsp parameter and let VSAM allocate

Re: Problem Going to VSAM from IAM

2012-07-19 Thread Joel C. Ewing
: 314.457.4939 -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of O'Brien, David W. (NIH/CIT) [C] Sent: Thursday, July 19, 2012 7:42 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Problem Going to VSAM from IAM Larry, Your dd statement specifies