Hi Mark,
We rarely defrag anything and until recently we had very little DASD. Most of our batch processes allocate to a single work pool. All allow multi-file allocations. Every night, a CA-Disk process runs to pick up the previous day's datasets from the workpool and mov e them to a hold pool. Datasets are trimmed to allocated size and, if less than 1 cyl. converted to track. The HOLDxx packs are filled. After 4 days of non-use, datasets are archived. The disk acrhive/tape archive line i s adjusted based on how much di sk was available vs. the slower restore times from tape. HTH, Linda Mooney ----- Original Message ----- From: "Mark Pace" <mpac...@gmail.com> To: IBM-MAIN@bama.ua.edu Sent: Thursday, March 4, 2010 11:01:15 AM GMT -08:00 US/Canada Pacific Subject: Re: Defrag I'll research DVC. Thanks. On Thu, Mar 4, 2010 at 1:59 PM, Staller, Allan <allan.stal...@kbm1.com>wrote: > You might want to consider getting somewhat more aggressive with dfHSM > migration. This will free up space, reduce extents required,..... > > Also consider DVC in the SMS STORCLAS. > > The historical pattern of DSN access (in most shops) is write/read once > and fageddaboudit. > > HTH, > > <snip> > Well it's not a performance issue I'm trying to resolve. It's simply > having > the volumes so fragmented that users sometimes have a hard time finding > the > amount of space they need in 16 extents. > </snip> > > On Thu, Mar 4, 2010 at 1:30 PM, McKown, John > <john.mck...@healthmarkets.com>wrote: > > > > -----Original Message----- > > > From: IBM Mainframe Discussion List > > > [mailto:ibm-m...@bama.ua.edu] On Behalf Of Mark Pace > > > Sent: Thursday, March 04, 2010 12:23 PM > > > To: IBM-MAIN@bama.ua.edu > > > Subject: Defrag > > > > > > Each day I run a Compress, Release, and Defrag on each volume > > > in my SMS DASD > > > Storage group. Some of the volumes still remain pretty > > > fragmented. Is > > > there a way to defrag the Storage Group? > > > > > > -- > > > Mark Pace > > > > Hum, we don't even bother. We have set things up so that almost all > our > > datasets are multivolume, via the DATACLAS. And by using DVC (Dynamic > Volume > > Count) and so on. The DASD is so fast any more that we don't think it > is > > worth the time to do defrags on volumes. Oh, and we try to keep a > fairly > > good amount of "head room" in the Storage Groups as well. > > > > -- > > John McKown > > Systems Engineer IV > > IT > > > > Administrative Services Group > > > > HealthMarkets(r) > > > > 9151 Boulevard 26 * N. Richland Hills * TX 76010 > > (817) 255-3225 phone * (817)-961-6183 cell > > 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...@bama.ua.edu with the message: GET IBM-MAIN INFO > > Search the archives at http://bama.ua.edu/archives/ibm-main.html > > > > > > -- > Mark Pace > Mainline Information Systems > 1700 Summit Lake Drive > Tallahassee, FL. 32317 > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@bama.ua.edu 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 lists...@bama.ua.edu with the message: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html > -- Mark Pace Mainline Information Systems 1700 Summit Lake Drive Tallahassee, FL. 32317 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu 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 lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
