> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:ibm-m...@bama.ua.edu] On Behalf Of Ted MacNEIL > Sent: Thursday, March 04, 2010 12:58 PM > To: IBM-MAIN@bama.ua.edu > Subject: Re: Defrag > > >The DASD is so fast any more that we don't think it is worth > the time to do defrags on volumes. > > DASD performance is NOT the only reason for defrags, not that > it's one to worry about anymore. > What about files restricted to single volumes (PDS[E])? > Small storage groups? > Volumes with such small free extents that nothing can be allocated? > If you're fortunate to not have any of these, then I guess > there is no reason for defrag, at all. > But, ... > - > Too busy driving to stop for gas!
I mentioned PDS type datasets in my original post, but didn't say much else. We have a separate storage group for them. But we don't create and delete large numbers of PDSes as a rule, so we can manage their storage "by hand". -- 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
