Compress Data Enterprise Guide vs Compress Data SAS VA Data Builder

[cesarssantos]

Hello there,

I have a Star schema too heavy, considering my environment. So, I'm looking for options to decrease or compress that data.

What's the difference between compressing my data in Enterprise Guide and compressing my data in SAS VA Data Builder?

I noticed that when I use the task Upload to Lasr after a query that compressed my data, my dataset returns to the size before the compressing. Can I compress the data while uploading to Lasr?

Do I have other options?

Thanks!

[LinusH · Accepted solution]

Compression is an attribute local to the storage, it's not transferred when you move the data.
There's a COMPRESS statement in PROC IMSTAT you could try.
http://documentation.sas.com/?docsetId=inmsref&docsetTarget=p1vi3iq0kbqmy8n1d3wcwy5mexn7.htm&docsetV...

[cesarssantos]

That is exactly what I was looking for, thank you very much.

[SASKiwi]

I recommend you don't compress data held in SAS VA LASR memory. In my experience VA report performance suffers quite badly, and it would be even worse with a star schema. I find uncompressed single SAS tables give the best performance, even if it means de-normalising your data from a star schema.

[cesarssantos]

Nice tip, thank you for your collaboration.