On Fri, 2009-07-03 at 14:12 +0200, Rachid Zarouali wrote:
> Hy,
> 
> FYI 70MB/s is the theoretical limit of a single 1GB isci connexion,
> if you want more,
> then you should consider using NIC aggregation.

I think this is not correct.  We can easily do more than this on a
single 1GB iSCSI connection.  Theoretical top transfer speed of a 1GB
connection is around 125MB/sec, and with iSCSI overhead we see around
110-115MB/sec per connection.  All of our systems have at least dual
iscsi connections and each can run more than 200MB/sec.

Now, we do use Qlogic iSCSI HBA's, modern, low-latency gigabit switches,
and jumbo frames, but we've seen over 95-100MB/sec even with software
iSCSI with normal frames on reasonably modern hardware.

Later,
Tom


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