Date:         Mon, 31 Jan 2011 15:56:32 -0500
Reply-To:     Suzanne McCoy <Suzanne.McCoy@CATALINAMARKETING.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Suzanne McCoy <Suzanne.McCoy@CATALINAMARKETING.COM>
Subject:      Re: Poor I/O performance
In-Reply-To:  <E6484AFA609C954BA6A094E4C6BF3C12254E2B6A84@EXCH14.GHCMASTER.GHC.ORG>
Content-Type: text/plain; charset="us-ascii"

try a proc copy and see if that is any faster

-----Original Message-----
From: SAS(r) Discussion [mailto:SAS-L@LISTSERV.UGA.EDU] On Behalf Of Tolbert, William
Sent: Monday, January 31, 2011 3:49 PM
To: SAS-L@LISTSERV.UGA.EDU
Subject: Poor I/O performance

Hi all -- I've got a Windows 7 virtual machine connected to a storage area network (commonly referred to as a SAN).

Reading a 6GB SAS dataset from the SAN takes about 8 minutes in SAS. That's pretty slow and I naturally assumed I had a bandwidth issue. However, I can *copy* the file using Windows Explorer in 1 minute, consistently. This appears to be something peculiar to SAS. I'm experimenting with bufsize and bufno, but so far I haven't found anything to explain this much difference.

Here's some code:

Data work.myfile;
  set san.myfile;
Run;
/* 8 minutes */

Copy \path\to\san\myfile myfile
/* 1 minute */


Thanks for you insight!

Bill



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