Thanks Ron Dave O'Brien NIH Contractor ________________________________________ From: Ron Hawkins [[email protected]] Sent: Thursday, January 28, 2010 1:51 PM To: [email protected] Subject: Re: SMS Compression - Software or Hardware
David, SMS uses hardware compression. It has an asymmetric CPU cost, where decompressing the data uses 80% less CPU than compressing it. Ron > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of > O'Brien, David W. (NIH/CIT) [C] > Sent: Thursday, January 28, 2010 10:18 AM > To: [email protected] > Subject: [IBM-MAIN] SMS Compression - Software or Hardware > > If a Dataclass with the following attributes is invoked: > > Data Set Name Type . . . . . : EXTENDED > If Extended . . . . . . . . : REQUIRED > Extended Addressability . . : YES > Record Access Bias . . . . : USER > Space Constraint Relief . . . : YES > Reduce Space Up To (%) . . : 50 > Dynamic Volume Count . . . : 20 > Compaction . . . . . . . . . : YES > > Is the resulting compaction software or hardware driven? > > I toild my user software, just want to confirm or correct. The ISMF panels > weren't much help. Neither is the 1.9 DFSMS Storage Administration Reference. > Not sure where else to look. > > Thank You, > Dave O'Brien > NIH Contractor > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] 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 [email protected] 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 [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
