Re: VSAM in extents

2007-07-30 Thread Ron Hawkins
ching from disk faster than the channels request it. Ron > -Original Message- > From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On > Behalf Of McKown, John > Sent: Thursday, July 26, 2007 9:07 AM > To: IBM-MAIN@BAMA.UA.EDU > Subject: [IBM-MAIN] VSAM in e

Re: VSAM in extents

2007-07-27 Thread Rick Fochtman
I'm curious about this one. A person here has stated that when a VSAM KSDS file is in multiple extents, it performs more poorly than it would in a single contigueous extent. He said something to the effect that when a portion of the index is refe

Re: VSAM in extents

2007-07-26 Thread Mark Zelden
Where's Mark Thomen when we need him. This is really a little out of my area and when it is I tend not to respond, but I'll have a go anyway... On Thu, 26 Jul 2007 11:06:36 -0500, McKown, John <[EMAIL PROTECTED]> wrote: >I'm curious about this one. A person here has stated that when a VSAM >KSD

Re: VSAM in extents

2007-07-26 Thread Gene Hudders
Sent via BlackBerry by AT&T -Original Message- From: "McKown, John" <[EMAIL PROTECTED]> Date: Thu, 26 Jul 2007 11:06:36 To:IBM-MAIN@BAMA.UA.EDU Subject: VSAM in extents I'm curious about this one. A person here has stated that when a VSAM KSDS file i

Re: VSAM in extents

2007-07-26 Thread O'Brien, David W. (NIH/CIT) [C]
buffers, eg. bufnd=180 ( assuming a 4k CI size) From: McKown, John [mailto:[EMAIL PROTECTED] Sent: Thu 7/26/2007 12:06 PM To: IBM-MAIN@BAMA.UA.EDU Subject: VSAM in extents I'm curious about this one. A person here has stated that when a VSAM KSDS file

Re: VSAM in extents

2007-07-26 Thread GAVIN Darren * OPS EAS
data and 512 index CISZ's usually better for random access as well. Darren -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of McKown, John Sent: Thursday, July 26, 2007 9:07 AM To: IBM-MAIN@BAMA.UA.EDU Subject: VSAM in extents I'm cur

Re: VSAM in extents

2007-07-26 Thread Farley, Peter x23353
> -Original Message- > From: McKown, John [mailto:[EMAIL PROTECTED] > Sent: Thursday, July 26, 2007 12:07 PM > To: IBM-MAIN@BAMA.UA.EDU > Subject: VSAM in extents > > I'm curious about this one. A person here has stated that when a VSAM > KSDS file is in multi

VSAM in extents

2007-07-26 Thread McKown, John
I'm curious about this one. A person here has stated that when a VSAM KSDS file is in multiple extents, it performs more poorly than it would in a single contigueous extent. He said something to the effect that when a portion of the index is referenced which is in "another extent" that the entire i