Re: Going from mod-3 to mod9

2012-01-30 Thread Bill Fairchild
paths there are. Bill Fairchild -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of Ron Hawkins Sent: Friday, January 27, 2012 9:17 PM To: IBM-MAIN@bama.ua.edu Subject: Re: Going from mod-3 to mod9 Bill, You said If the shared control unit

Re: Going from mod-3 to mod9

2012-01-27 Thread Ron Hawkins
Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of Bill Fairchild Sent: Monday, January 23, 2012 11:21 AM To: IBM-MAIN@bama.ua.edu Subject: Re: [IBM-MAIN] Going from mod-3 to mod9 In 45e5f2f45d7878458ee5ca679697335502e25...@usdaexch01.kbm1.loc, on 01/23/2012 at 09:08 AM, Staller

Re: Going from mod-3 to mod9

2012-01-27 Thread Ron Hawkins
] Going from mod-3 to mod9 Iosq? Really? This is raid dasd, isn't slow 3390-9's a thing of the past? _ Dave Jousma Assistant Vice President, Mainframe Services david.jou...@53.com 1830 East Paris, Grand Rapids, MI 49546 MD

Re: Going from mod-3 to mod9

2012-01-27 Thread Ron Hawkins
mod-3 to mod9 *Yes*. Hardware improvements have reduced the impact, but the issue still exists. Think lots of itty-bitty datasets on a mod 9. You previously had 3 logical actuators to access 3 units of data . With mod 9 you have 1 logical actuator to access the same amount of data

Re: Going from mod-3 to mod9

2012-01-27 Thread Ron Hawkins
-Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of Dennis McCarthy Sent: Tuesday, January 24, 2012 5:28 AM To: IBM-MAIN@bama.ua.edu Subject: Re: [IBM-MAIN] Going from mod-3 to mod9 Hi Joel, We do NOT have any PAV's. We are a pretty

Re: Going from mod-3 to mod9

2012-01-27 Thread Ron Hawkins
Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of Shmuel Metz (Seymour J.) Sent: Monday, January 23, 2012 10:19 AM To: IBM-MAIN@bama.ua.edu Subject: Re: [IBM-MAIN] Going from mod-3 to mod9 In 45e5f2f45d7878458ee5ca679697335502e25...@usdaexch01.kbm1.loc, on 01/23/2012 at 09:08

Re: Going from mod-3 to mod9

2012-01-27 Thread Ron Hawkins
Gil, I'm not sure I understand why there would be increased seek lengths on the 3390-9 SLED.. The avg seek of a 3390 as almost the same as a 3390-9, but intra-dataset seek time was reduced by up to two thirds because the same size dataset used one third of the platter radius. Ron With

Re: Going from mod-3 to mod9

2012-01-25 Thread Bill Fairchild
Dennis, We also need to see the I/O rate for your various volumes in your spreadsheet sample. Bill Fairchild -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the

Re: Going from mod-3 to mod9

2012-01-25 Thread Ed Finnell
RMFPP does a good job of this, if you're so inclined! In a message dated 1/25/2012 9:13:33 A.M. Central Standard Time, bfairch...@rocketsoftware.com writes: We also need to see the I/O rate for your various volumes in your spreadsheet sample.

Re: Going from mod-3 to mod9

2012-01-24 Thread Dennis McCarthy
Hi Joel, We do NOT have any PAV's. We are a pretty small shop. One production LPAR and one test (sandbox for me). The VSAM file in question is open to a single CICS region. Give that additional information, can I expect a negative impact on response time going to the MOD-9's? Dennis

Re: Going from mod-3 to mod9

2012-01-24 Thread Joel C. Ewing
On 01/24/2012 07:28 AM, Dennis McCarthy wrote: Hi Joel, We do NOT have any PAV's. We are a pretty small shop. One production LPAR and one test (sandbox for me). The VSAM file in question is open to a single CICS region. Give that additional information, can I expect a negative impact on

Re: Going from mod-3 to mod9

2012-01-24 Thread Cosby, Bob - OCFO
@bama.ua.edu] On Behalf Of Jousma, David Sent: Monday, January 23, 2012 9:18 AM To: IBM-MAIN@bama.ua.edu Subject: Re: Going from mod-3 to mod9 Iosq? Really? This is raid dasd, isn't slow 3390-9's a thing of the past? _ Dave Jousma

Re: Going from mod-3 to mod9

2012-01-24 Thread Mike Schwab
where the fire is. -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of Jousma, David Sent: Monday, January 23, 2012 9:18 AM To: IBM-MAIN@bama.ua.edu Subject: Re: Going from mod-3 to mod9 Iosq?   Really?   This is raid dasd, isn't slow

Re: Going from mod-3 to mod9

2012-01-23 Thread Staller, Allan
snip 1. We just had 3390-9's configured into our EMC box. This box also contains 3390-3's. Given that the hardware is the same throughout and all other things being equal, is there any decrease in response time on the mod-9's? /snip Beware of IOSQ! From the viewpoint of the Operating System, you

Re: Going from mod-3 to mod9

2012-01-23 Thread Jousma, David
616.653.2717 -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of Staller, Allan Sent: Monday, January 23, 2012 10:09 AM To: IBM-MAIN@bama.ua.edu Subject: Re: Going from mod-3 to mod9 snip 1. We just had 3390-9's configured into our EMC box. This box

Re: Going from mod-3 to mod9

2012-01-23 Thread Vernooij, CP - SPLXM
616.653.8429 f 616.653.2717 -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of Staller, Allan Sent: Monday, January 23, 2012 10:09 AM To: IBM-MAIN@bama.ua.edu Subject: Re: Going from mod-3 to mod9 snip 1. We just had 3390-9's

Re: Going from mod-3 to mod9

2012-01-23 Thread Paul Gilmartin
On Mon, 23 Jan 2012 10:18:09 -0500, Jousma, David wrote: Iosq? Really? This is raid dasd, isn't slow 3390-9's a thing of the past? Is z/OS unaware of the underlying RAID and designed not to dispatch concurrent operations to what it sees as a single device? -Original Message- From:

Re: Going from mod-3 to mod9

2012-01-23 Thread Staller, Allan
Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of Jousma, David Sent: Monday, January 23, 2012 9:18 AM To: IBM-MAIN@bama.ua.edu Subject: Re: Going from mod-3 to mod9 Iosq? Really? This is raid dasd, isn't slow 3390-9's a thing of the past? From: IBM Mainframe Discussion List [mailto:IBM-MAIN

Re: Going from mod-3 to mod9

2012-01-23 Thread Staller, Allan
snip Is z/OS unaware of the underlying RAID and designed not to dispatch concurrent operations to what it sees as a single device? /snip Correct! With the exception of PAV (which was invented to address the IOSQ issue!) We could get into a long discussion here, but large datasets that take up

Re: Going from mod-3 to mod9

2012-01-23 Thread Paul Gilmartin
On Mon, 23 Jan 2012 09:52:27 -0600, Staller, Allan wrote: *Yes*. Hardware improvements have reduced the impact, but the issue still exists. Think lots of itty-bitty datasets on a mod 9. You previously had 3 logical actuators to access 3 units of data . With mod 9 you have 1 logical actuator to

Re: Going from mod-3 to mod9

2012-01-23 Thread Staller, Allan
Generally speaking...Yes snip IOW, the response time is more likely to increase than to decrease, and increased response time is a Bad Thing /snip PAV, Cache, and RAID all have impacts that mitigate the 1:3 (or worse) actuator to data ratio on mod 9 vs. 3 mod 3. These impacts may not be part

Re: Going from mod-3 to mod9

2012-01-23 Thread Joel C. Ewing
On 01/23/2012 10:09 AM, Staller, Allan wrote: Generally speaking...Yes snip IOW, the response time is more likely to increase than to decrease, and increased response time is a Bad Thing /snip PAV, Cache, and RAID all have impacts that mitigate the 1:3 (or worse) actuator to data ratio on mod

Re: Going from mod-3 to mod9

2012-01-23 Thread Shmuel Metz (Seymour J.)
In 45e5f2f45d7878458ee5ca679697335502e25...@usdaexch01.kbm1.loc, on 01/23/2012 at 09:08 AM, Staller, Allan allan.stal...@kbmg.com said: Beware of IOSQ! From the viewpoint of the Operating System, you now have 3 times as much data behind the actuator on Mod-9's as Mod-3's. If the Operating

Re: Going from mod-3 to mod9

2012-01-23 Thread Bill Fairchild
In 45e5f2f45d7878458ee5ca679697335502e25...@usdaexch01.kbm1.loc, on 01/23/2012 at 09:08 AM, Staller, Allan allan.stal...@kbmg.com said: From the viewpoint of the Operating System, you now have 3 times as much data behind the actuator on Mod-9's as Mod-3's. If the Operating system *thinks* the

Re: Going from mod-3 to mod9

2012-01-23 Thread Linda Mooney
from mod-3 to mod9 A couple of questions: 1. We just had 3390-9's configured into our EMC box. This box also contains 3390-3's. Given that the hardware is the same throughout and all other things being equal, is there any decrease in response time on the mod-9's? 2. I have a VSAM file

Re: Going from mod-3 to mod9

2012-01-23 Thread Joel C. Ewing
On 01/23/2012 01:21 PM, Bill Fairchild wrote: In45e5f2f45d7878458ee5ca679697335502e25...@usdaexch01.kbm1.loc, on 01/23/2012 at 09:08 AM, Staller, Allanallan.stal...@kbmg.com said: From the viewpoint of the Operating System, you now have 3 times as much data behind the actuator on Mod-9's

Going from mod-3 to mod9

2012-01-20 Thread Dennis McCarthy
A couple of questions: 1. We just had 3390-9's configured into our EMC box. This box also contains 3390-3's. Given that the hardware is the same throughout and all other things being equal, is there any decrease in response time on the mod-9's? 2. I have a VSAM file (with extended