LISTSERV at the University of Georgia
Menubar Imagemap
Home Browse Manage Request Manuals Register
Previous messageNext messagePrevious in topicNext in topicPrevious by same authorNext by same authorPrevious page (March 1999, week 2)Back to main SAS-L pageJoin or leave SAS-L (or change settings)ReplyPost a new messageSearchProportional fontNon-proportional font
Date:         Wed, 10 Mar 1999 09:13:25 -0500
Sender:       "SAS(r) Discussion" <SAS-L@UGA.CC.UGA.EDU>
Subject:      Re: Inquiry on mvs
Comments: To: WIELKI ANDRE <andre.wielki@INSEE.FR>
Content-Type: text/plain; charset=US-ASCII

Andre Wielki posted the following:

>In our organization, there is a discussion about the size by default we >must put for the saswork on mvs with disks 3390. I think most of you will >be curious to know the usage of the length for the sas609 version > in the others mvs places. If the users send to me the information, i >promise to make a little tabulate on the answers. The information needed >are type of disk , some indication about the datasets (many little, big >one , large or narrow observations) and lrecl and blocksize of your sas >609 call procedure (6144 , 27648 or other). > >In a second time, one of the specialist in mvs (Raithel for example and >others) will make comments on the results in term of performances. >

Bonjours, Andre! I would definitely like to participate in your survey. For my part, I always block the SAS Work data set, on 3390 DASD, at 27648 bytes. This ensures that I get two physical blocks per track and that I am using 98.8% of the track area. (This is wildly opposed to the 6144-byte block size that puts 8 physical blocks on each track and uses 92% of the track area). I use the 27648 block size for both my batch and my interactive SAS tasks.

Good luck in your survey; I will look forward to reading the results!

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Michael A. Raithel "The man who wrote the book on performance." E-mail: Author: Tuning SAS Applications in the MVS Environment +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ...everywhere you go you see them searching; everywhere you go you feel their pain; everyone is looking for the answer; well, look again... ---The Moody Blues +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Back to: Top of message | Previous page | Main SAS-L page