Re: (ASCEND) P50 -> P400 Speeds

[Ross Wheeler <ross@home.albury.net.au>]

On Wed, 4 Aug 1999, Ken Kirchner wrote:

> Can anyone speculate as to the validity of this claim: "When my P50
> (128k ISDN) was connected to so-and-so's P400, I regularly got 500KB/s
> transfers of my web logs."

> Using compression with a 4:1 ratio (according to Ascends docs) we would

> we created a 22MB file of all zero's and tested the speeds between a P50
> and a 3Com Total Control chassis.  We got 1,040,000 bits/s (or 130,000
> Bytes/s).  This is a 8.125:1 ratio using STAC-9.  It was quite

> magical property of a P400/P50 combo that would allow for a 31.25:1
> compression ratio, thus allowing this customer to get 500KB downloads of
> his web logs?

Ken, I just grabbed a small apache web log from my system (the closest I
had to *your* 22Mb was one 18.2Mb) - compression ration 89.2%

A slightly larger file, 1,929,719,143 bytes (1.9Gb) compressed 84.7% down
to 294Mb, and others I checked in the range of 1Gb to 4Gb turned in
compression ratios variously between 84% and 88%, so it's pretty
consistent compression ratios for that kind of log file.

I'd say their claims are entirely reasonable :-)

RossW

++ Ascend Users Mailing List ++
To unsubscribe:	send unsubscribe to ascend-users-request@bungi.com
To get FAQ'd:	<http://www.nealis.net/ascend/faq>