Jeff Bach wrote:
> 54 Gigs per hour testing using an Exchange client single threading to a 3590
> tape drive.  Compression is running on the client.

Keep in mind of course that you've got the same CPU(s) running Exchange
*and* compressing 54GB worth of data every hour.

While you get better throughput with client-side compression, you'll get
better storage compression (and a zippier Exchange server) by turning
off client-side compression and turning on hardware (tape drive)
compression. And if you're running client-side compression *and*
hardware compression, you're creating extraneous work that nets you no
additional benefits. (You *do* have hardware compression turned off,
don't you?)

--
Mark Stapleton (stapleton AT berbee DOT com)
Mark Stapleton (stapleton AT berbee DOT com)