Re: [SLE] Home made NAS with SUSE - filesystem questions

On Wed, 19 Jul 2006, Basil Chupin wrote:

Dave Howorth wrote:
HG wrote:
Hi!

I'm planning to build a home made NAS using old harware and SUSE. SUSE
might not be the best OS for this, but it's the only Linux I have
administered at least somewhat.

Ok, what I'm thinking is a old PC with lot's of old disks inside and a
gigabit ethernet (planning to do video editing over it also).

Even gigabit ethernet is WAY slower than local disks. You may find it a pain
for video editing. It might be OK to store video there, copy it to a local
disk while you edit it and then copy it back. But the bottom line is
experience - I suggest you set up the gigabit link and run some tests with
it first :)

Cheers, Dave

I haven't seen the original posting so this response is to HG.

Forget about using the gigabit ethernet way of transferring video files let
alone trying to do editing of video over such a link. Just transferring a
small ~4GB mpeg file will take about 45 minutes (from memory, so don't quote
me :-) ) and this using HDs with 16MB caches on both computers at the end of
the gigabit connection. After falling asleep while one such transfer was
taking place I gave the whole idea away and now only work on the one computer
:-) .

Let's see. 4GB. 4GB = 4096 MB. At 50MB/s that is 82 seconds. At 1/2 of
gig-e's (more like 62.5% of to be conservative) speed. At (say) 75 MB/s
a 4GB transfer would take under a minute. That's *way* faster than any
local disk I've ever had.

If it is taking that long to transfer the data you have something wrong
with your network or the disks are too slow. If the disks are too slow
than complaining about the network doesn't help.

(I have a tv card on each computer and it is not realistic to watch anything
sent from one machine to the other over this link unless you enjoy looking at
garbage on your monitor :-) .)

Again, something has to be wrong with your setup. Even fast ethernet is
more than capable of handling even HDTV-sized video streams. Lots and
lots of people use fast ethernet (not even gig-e) for their myth boxes
and freevo boxes, etc...

--
Carpe diem - Seize the day.
Carp in denim - There's a fish in my pants!

Jon Nelson <jnelson-suse@xxxxxxxxxxx>

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