Introduction & RE: Clustering with Freebsd

Matthew SWINBOURNE m.swinbourne at
Thu May 12 16:10:53 PDT 2005


Sorry, I wasn't aware of that.  With iSCSI these cards definitely help,
but it there's no stack used for the AOE stuff then cool.  Am I right in
thinking then, that most of the increase in load is interupt load for
I/O on the adapter?


-----Original Message-----
From: Gabriel Ambuehl [mailto:gabriel_ambuehl at] 
Sent: Thursday, 12 May 2005 5:40 PM
Cc: FreeBSD Clustering List
Subject: Re: Introduction & RE: Clustering with Freebsd

Matthew SWINBOURNE wrote:

>Hi All,
>Something to think about along these lines are TCP Off-Loader (TOE) 
>cards.  If you are seriously looking at ATA over ethernet or something 
>similar on any production scale, then these cards are a life saver.
>Reduce the CPU overhead of running storage via TCP/IP to almost 

As I understand, this is the whole point of ATA over Ethernet (vs
iSCSI): it doesn't actually use TCP/IP, it runs on raw ethernet (and
thus isn't routeable but that's probably more of a feature than a bug).

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