Date: Thu, 16 May 2002 06:47:45 -0500
Reply-To: Gregg Snell <gsnell@DATASAVANTCONSULTING.COM>
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: Gregg Snell <gsnell@DATASAVANTCONSULTING.COM>
Subject: Re: storage space problems
Content-Type: text/plain; charset="iso-8859-1"
Unless you have a particularly slow system, compression should actually
speed things up just a bit. The following sentence can be found in
OnlineDoc under "Overview of Techniques for Optimizing I/O"
You can reduce the number of data accesses by processing more data each time
a device is accessed by setting the BUFNO=, BUFSIZE=, CATCACHE=, and
COMPRESS= system options.
Although it will increase the amount of cpu time required for each job.
Gregg P. Snell
Data Savant Consulting
(208) 977-1943 fax
"Ulrike Grömping" <ugroempi@FORD.COM> wrote in message
> This compression suggestion sounds interesting. I'm already quite at the
> limit with deleting unused files etc. I'm just wondering whether
> compressed files will be accessible a lot slower than uncompressed ones
> Regards, Ulrike
> > ...
> > There is another trick to decrease space, which you should try: use the
> > option COMPRESS=YES. That might reduce your dataset-sizes to less than
> > If you have SAS V8, you can try COMPRESS=BINARY; that is more efficient.
> > The only problem is: you cannot direct access obs if the dataset is
> > compressed. But there is normally no situation where you need it!