cheap san was (E: [NTLUG:Discuss] File Size Limit)

[Alfred Dayton]

Hi Kevin,

        So far my research indicates that udma100 drives are limited to
practical throughput of 30 MB/s

Which would translate to .3 gbits on the wire.  This would mean that my test
case (25 gig avi file xfer)

Pc to pc throughput is being presently limited by the 100MB lan.  So
upgrading to 1GB nic/switch lan would provide probably

About a 500 percent increase in throughput over the existing 100MB lan,
assuming present 60MB/s current rate.

That should drop the present xfer down from 60 minutes to 12 minutes per 25
gig file.

I can live with that :).

Alfred

-----Original Message-----
From: discuss-bounces at ntlug.org [mailto:discuss-bounces at ntlug.org]On Behalf
Of kbrannen at gte.net
Sent: Saturday, November 22, 2003 2:51 PM
To: NTLUG Discussion List
Subject: Re: cheap san was (E: [NTLUG:Discuss] File Size Limit)

Chris Cox wrote:
> Alfred Dayton wrote:
> ...
>
>> the answer is to go with gb nics and switch with a new linux Box B with
>> either the new serial ATA or
>>
...
>> What arre your thoughts?
>
...
> SATA is maturing... not sure if I'd take the plunge yet though.
> The good news is that currently , the
> high end SATA drives are coming with warranties that are similar
> to SCSI drives (yippee!!).  As SATA becomes commodity, look for
> this to drop back down again (back to 1 year again).
...

I'm about to have to start shoving CD images (500MB) between computers at my
church.  I've gone with Gb NICs and SATA drives (which I *really* like after
using IDE on Intel boxes for so long).  This seemed like the best bang for
the
buck, considering our present equipment.

The second box and Gb switch is due to arrive any day now, :-) I can get
back
to you in a week or 2 if you want to compare results.

Unfortunately, they'll be 2 MS-Win2K machines...sigh...the app software only
has MS-Windows releases.  We use the machines to drive CD duplicators
(completely automated with a robotic arm and printer, very cool toys :-).

As for testing the transfer speed, I'll probably use ttcp (it's available
free
for both Unix and MS-Windows platforms).

Kevin


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