Re: [ot] one for the networking guru's

["yhkeppy" <keith@xxxxxxx>]

Paul,

Try running a test yourself rather than relying on the manuf's
numbers (though if you have this type of setup i doubt you'll find
any book details). Use perfmon - i'd be interested in hearing the
results (i normally work with large disk installations in SAN and
DAS setups, so i'd be interested in seeing how your system measures
up).

Keith

--- In ukha_d@xxxxxxx, "Paul Gale" <groups@s...> wrote:
>
> Ah, but I'm not talking about any old SCSI HDD's - I have a
striped array of ultra fast SCSI LVD 160 HDD's - this is a
requirement of my top end video edit station that can play THREE
streams of D1 digital video SIMULTANEOUSLY in an edit!!! :)
>
> I'll need to check the max performance as I can't remember the
speeds - but it's way over 20MB per sec.
>
> Paul.
>
>
> -----Original Message-----
> From: yhkeppy [mailto:keith@xxxxxxx...]
> Sent: 09 October 2003 18:27
> To: ukha_d@xxxxxxx
> Subject: [ukha_d] Re: [ot] one for the networking guru's
>
> I agree with this. I'd also add that 100Mbps is actually quite
fast
> in comparison with current disk transfer rates. When you consider
> that a really fast ATA100 disk can write sustained at around
35MB/s
> (which really is disk to disk across the disk bus on the same
> machine with no CPU intervention), when you then have to get that
> read/write cycle across the disk bus and out onto the comms bus
when
> its not sustained either, that's going to go much over 15-20MB/s -
> and this is almost the same speed as a maxed out 100Mbps network!!
>
> Sure gigabit network will remove A bottleneck, but I doubt it will
> be the killer in your scenario. You could put second 100Mbps cards
> into the machines, cross connect them and subnet them off.
Assuming
> they are also not connected together via a second network, you
will
> avoid routing loops and you should theoretically get the maximum
> efficiency out of the link.
>
> By the way, SATA and SCSI are actually not a lot faster than
modern
> IDE - the latest IDE drives are right up there on performance, and
> SATA only improves this by a smallish margin. The real difference
is
> in big storage architectures, where you can just have more SATA or
> SCSI disk in a single store.
>
> Keith
>
> --- In ukha_d@xxxxxxx, "Shaf Ali" <shaf@s...> wrote:
> > Mate be4 even considering this what is your current throughput ?
> Where are
> > the bottlenecks ?
> >
> > I might be an idea to nail out your bottlenecks before
> proceeding...
> >
> > An example : Is 1 minute to transfer a 700Meg DivX file not fast
> enough ?
> > Why am I not transfering this fast already ?
> >
> > Think of the software a nd architecture first.
> >
> > Shaf
> >
> >
> >
> >
> > ----- Original Message -----
> > From: "Paul Gale" <groups@s...>
> > To: <ukha_d@xxxxxxx>
> > Sent: Thursday, October 09, 2003 4:16 PM
> > Subject: [ukha_d] [ot] one for the networking guru's
> >
> >
> > Got a few PC's connected via 100Mbps LAN - want to connect two
of
> my edit PC
> > 's together via Gigabit networking to share very large video and
> audio files
> > for edit. Can I add a second Ethernet card (gigabit) to each so
> that peer to
> > peer traffic between them uses the faster link (they both have
> very fast
> > disk IO - SCSI and SATA) and not the existing n/w infrastructure?
> >
> > I guess this is a routing issue but how do you tell XP and W2K
to
> do this?
> >
> > Cheers,
> >
> > Paul.
> >
> >
> >
> >
> >
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> >
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