Splitting the DATA and INDEX Components of Extended Addressing Dataset
I'm hoping that someone can help me out here... Is there a way through the ACS routines to allocate the DATA component on one disk volume and the INDEX on another and are you willing to share the code or knowledge? Thanks in Advance! * * *George Rodriguez* *Specialist II - IT Solutions* *Application Support / Quality Assurance* *PX - 47652* *(561) 357-7652 (office)* *(561) 707-3496 (mobile)* *School District of Palm Beach County* *3348 Forest Hill Blvd.* *Room B-251* *West Palm Beach, FL. 33406-5869* *Florida's Only A-Rated Urban District For Seven Consecutive Years* Home of Florida's first LEED Gold Certified School Under Florida law, e-mail addresses are public records. If you do not want your e-mail address released in response to a public records request, do not send electronic mail to this entity. Instead, contact this office by phone or in writing. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Splitting the DATA and INDEX Components of Extended Addressing Dataset
One way it's possible is to use a storage class with the Guaruntee'd Space attribute and specify different volumes for the Data Index. Of course, you have to understand what storage group SMS is going to assign the dataset to and chose volumes within that storage group. I ran a test here it worked fine. I do believe, although I didn't check the manual, that both the data index have to be allocated within the same storage group. HTH's ddk Addressing Dataset I'm hoping that someone can help me out here... Is there a way through the ACS routines to allocate the DATA component on one disk volume and the INDEX on another and are you willing to share the code or knowledge? Thanks in Advance! This e-mail message and all attachments transmitted with it may contain legally privileged and/or confidential information intended solely for the use of the addressee(s). If the reader of this message is not the intended recipient, you are hereby notified that any reading, dissemination, distribution, copying, forwarding or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender immediately and delete this message and all copies and backups thereof. Thank you. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Splitting the DATA and INDEX Components of Extended Addressing Dataset
There used to be a legitimate performance reason for doing this 20 years ago when accesses to the index alone on a hot VSAM file could saturate a single real 3380/3390 drive. With today's emulated DASD, DASD Subsystem cache several orders of magnitude larger, multiple PAV accesses to a logical drive, and faster physical drives, all the motivations for doing this in the past have essentially vanished. Even if DASD subsystems with PAV support might cost more, it is still cheaper than personnel costs associated with micro-managing DASD file placement (and the additional performance costs when that micro-management is done less than perfectly). Joel C Ewing On 06/20/2012 11:12 AM, O'Brien, David W. (NIH/CIT) [C] wrote: George, It might help to know what you're trying to accomplish by doing this. Given the size of today's disks, there is no guarantee that placing the Data and Index on separate Logical volumes will in turn place them on separate physical volumes. Regards, Dave O'Brien -Original Message- From: George Rodriguez [mailto:george.rodrig...@palmbeachschools.org] Sent: Wednesday, June 20, 2012 11:34 AM To: IBM-MAIN@listserv.ua.edu Subject: Splitting the DATA and INDEX Components of Extended Addressing Dataset I'm hoping that someone can help me out here... Is there a way through the ACS routines to allocate the DATA component on one disk volume and the INDEX on another and are you willing to share the code or knowledge? Thanks in Advance! * * *George Rodriguez* *Specialist II - IT Solutions* *Application Support / Quality Assurance* *PX - 47652* *(561) 357-7652 (office)* *(561) 707-3496 (mobile)* *School District of Palm Beach County* *3348 Forest Hill Blvd.* *Room B-251* *West Palm Beach, FL. 33406-5869* ... -- Joel C. Ewing,Bentonville, AR jcew...@acm.org -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Splitting the DATA and INDEX Components of Extended Addressing Dataset
Please! I appreciate everyone's input on this problem... To answer why... This is a very high I/O file with delays. Mainline, the company assisting with the performance study, suggested splitting the DATA and INDEX component. Thanks for all the replies... * * *George Rodriguez* *Specialist II - IT Solutions* *Application Support / Quality Assurance* *PX - 47652* *(561) 357-7652 (office)* *(561) 707-3496 (mobile)* *School District of Palm Beach County* *3348 Forest Hill Blvd.* *Room B-251* *West Palm Beach, FL. 33406-5869* *Florida's Only A-Rated Urban District For Seven Consecutive Years* On Wed, Jun 20, 2012 at 12:53 PM, Baraniecki, Ray ray.baranie...@morganstanleysmithbarney.com wrote: John; At Morgan Stanley we split the index and data all the time. We are outsourced to IBM Global Services and it is their ACS routines that do this. On the DEFINE control statements in the INDEX component the VOLUME parameter looks like VOL=(I * * * * *) where the I is a pseudo volser and the * are secondary volsers. On the DATA component we specify VOLUME=(D * * * * *) where the D is also a pseudo volser and the * are secondary volsers. I will contact IBM to obtain the details if you like. Please let me know. Thanks; Ray Baraniecki Morgan Stanley Smith Barney 1 New York Plaza - 18th Floor New York, NY 10004 Telephone: 212-276-5641 Cell: 917-597-5692 -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@listserv.ua.edu] On Behalf Of McKown, John Sent: Wednesday, June 20, 2012 12:09 PM To: IBM-MAIN@listserv.ua.edu Subject: Re: Splitting the DATA and INDEX Components of Extended Addressing Dataset -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@listserv.ua.edu] On Behalf Of George Rodriguez Sent: Wednesday, June 20, 2012 10:34 AM To: IBM-MAIN@listserv.ua.edu Subject: Splitting the DATA and INDEX Components of Extended Addressing Dataset I'm hoping that someone can help me out here... Is there a way through the ACS routines to allocate the DATA component on one disk volume and the INDEX on another and are you willing to share the code or knowledge? Thanks in Advance! Interesting question. My gut feel is that you can't do this. But I do wonder what would happen if the STORGRUP ACS routine mapped the different components of a VSAM cluster into different storage groups, which would put them on different volumes. I do know that the components must reside in the same STORAGE CLASS. And that the STORGRUP ACS routine is not forced to map a given STORCLAS to a single STORGRUP. -- John McKown Systems Engineer IV IT Administrative Services Group HealthMarkets(r) 9151 Boulevard 26 * N. Richland Hills * TX 76010 (817) 255-3225 phone * john.mck...@healthmarkets.com * www.HealthMarkets.com Confidentiality Notice: This e-mail message may contain confidential or proprietary information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. HealthMarkets(r) is the brand name for products underwritten and issued by the insurance subsidiaries of HealthMarkets, Inc. -The Chesapeake Life Insurance Company(r), Mid-West National Life Insurance Company of TennesseeSM and The MEGA Life and Health Insurance Company.SM -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- NOTICE: Morgan Stanley is not acting as a municipal advisor and the opinions or views contained herein are not intended to be, and do not constitute, advice within the meaning of Section 975 of the Dodd-Frank Wall Street Reform and Consumer Protection Act. If you have received this communication in error, please destroy all electronic and paper copies and notify the sender immediately. Mistransmission is not intended to waive confidentiality or privilege. Morgan Stanley reserves the right, to the extent permitted under applicable law, to monitor electronic communications. This message is subject to terms available at the following link: http://www.morganstanley.com/disclaimers. If you cannot access these links, please notify us by reply message and we will send the contents to you. By messaging with Morgan Stanley you consent to the foregoing. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN Home of Florida's first LEED Gold Certified School Under Florida law, e-mail addresses are public records. If you do not want your e-mail address released in response to a public records request, do