Veritas-bu

Re: [Veritas-bu] 10GB network + perf questions etc

2007-08-27 10:35:16
Subject: Re: [Veritas-bu] 10GB network + perf questions etc
From: Justin Piszcz <jpiszcz AT lucidpixels DOT com>
To: Curtis Preston <cpreston AT glasshouse DOT com>
Date: Mon, 27 Aug 2007 10:20:11 -0400 (EDT)

On Sun, 26 Aug 2007, Curtis Preston wrote:

>> If it's the card I'm thinking about the TCP checksum is already offload
>> to hardware. In fact most gigaswift cards support this today with 1
> Gbit
>> technology.
>
> Offloading the checksum is not the same as a full TCP offload.  A "true"
> TOE card offloads ALL TCP processing, not just the checksum.
>
>> I think a great deal of tuning would be required to achieve anywhere
>> near 10 GB w/ a single TCP stream.
>
> I think you can tune your heart out and you'll never get anywhere close.
> Maybe it's possible with a TOE card, but I haven't heard from anyone
> yet.
>
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I am still waiting for someone to report > 250 MiB/s with RHEL3/4/5 using 
10GBps NICs.

Then I'd like to know how they optimized their cards :)

Justin.
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