BookmarkSubscribeRSS Feed
OS2Rules
Obsidian | Level 7
Hi Again:

Further to the fascinating discussion on zipping mainframe SAS data, I have found something that defies explanation....

My "transportable" SAS dataset will download from the mainframe at 3,408,024 bytes/second

My compressed dataset will download from the mainframe at 421,011 bytes/second.

The compressed file is a zipped copy of the SAS file in transportable format,

Both use the same CONNECT session. Both use PROC DOWNLOAD. The uncompressed file uses a DATA=xxx OUT=yyy and the zipped file uses INFILE=zzz OUTFILE=bbb.

Why are they different? I have been assured that (repeatedly) that there is no hardware compression. They bytes in the uncompressed file aren't smaller than in the compressed file (grins). Even though the zipped file downloads faster, the unzipped file downloads at about 8x the speed of the zipped file.

Any ideas?
3 REPLIES 3
CurtisMack
Fluorite | Level 6
We ran into a similar situation. It was caused by our firewall caching and uncompressing the zipped file in its efforts to look for viruses. Is there a firewall in the network path? We had to disable virus scanning on that network path.
OS2Rules
Obsidian | Level 7
Curtis:

I checked - no firewall and no virus scan going on here.
sbb
Lapis Lazuli | Level 10 sbb
Lapis Lazuli | Level 10
Suggest you try native FTP (binary transfer) and compare without SAS being in the picture -- then if the results are not consistent, open a SAS track with the original question.

Scott Barry
SBBWorks, Inc.

SAS Innovate 2025: Save the Date

 SAS Innovate 2025 is scheduled for May 6-9 in Orlando, FL. Sign up to be first to learn about the agenda and registration!

Save the date!

What is Bayesian Analysis?

Learn the difference between classical and Bayesian statistical approaches and see a few PROC examples to perform Bayesian analysis in this video.

Find more tutorials on the SAS Users YouTube channel.

SAS Training: Just a Click Away

 Ready to level-up your skills? Choose your own adventure.

Browse our catalog!

Discussion stats
  • 3 replies
  • 868 views
  • 0 likes
  • 3 in conversation