Re: [Xen-users] Network based storage - NBD/AoE/iSCSI other?

[Luke Crawford <lsc@xxxxxxxxx>]

On Mon, 2 Oct 2006, Tom Mornini wrote:
> > > the Coraid's 15-drive box is just a P4 SuperMicro mainboard, with two
> > > SuperMicro 8-port SATA cards on a 3U SuperMicro case, and an IDE 
> > > flashdrive
> > > with Plan9 OS and its own software.  nothing hard to replicate...
> > And their performance numbers are relatively terrible, so you should be
> > able to do much better by building it on your own.  (Unless the bad
> > performance numbers are due to AoE itself, which I somewhat doubt, but
> > regardless, I was able to do about 30% better with iSCSI.)
> In terms of what? We're getting a very high IOPS rate, and nearly saturating 
> gigabit ethernet.
write-through or write-back cache?  lots of systems default to write-back, 
as the performance will be worlds better with write-back, at the expence 
of safety.
(just saying 'cause it would explain the different performance numbers)

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