[LARTC] route with two uplinks actually slower than one

[LARTC] route with two uplinks actually slower than one

[John covici]

Hi.  At the moment I have two high speed connections to the internet
-- one somewhat faster than the other.  I was looking at the advanced
router howto and created the tables, etc as specified in section 4.2
of that document and changed my default route to a multipath route
with weight 2 on the faster provider and weight 1 for the slower one.

Then I went and downloaded a test file, but to my surprise I was
getting a lower speed than with the default route to the faster
provider.  Is there a better way to do this so it actually does me
some good?

Even if it doesn't work I have certainly learned something in the
process, but I thought two routes would be better than one.

Any suggestions would be appreciated.

-- 
         John Covici
         covici@ccs.covici.com
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Re: [LARTC] route with two uplinks actually slower than one

[Arthur van Leeuwen]

On Mon, 17 Mar 2003, John covici wrote:

> Hi.  At the moment I have two high speed connections to the internet
> -- one somewhat faster than the other.  I was looking at the advanced
> router howto and created the tables, etc as specified in section 4.2
> of that document and changed my default route to a multipath route
> with weight 2 on the faster provider and weight 1 for the slower one.

> Then I went and downloaded a test file, but to my surprise I was
> getting a lower speed than with the default route to the faster
> provider.  Is there a better way to do this so it actually does me
> some good?

On your own, with 1 single test file, multipath routing not help. However,
it will help in providing more throughput when a lot of traffic is flowing
to and from different sites.

Think of it as a multiprocessing problem: if you have only one linear process,
there is nothing to multitask. If, however, you have a number of processes
they can be dealt with in parallel on the different processing chains
(uplinks, in this case), and the end result will be faster overall.

Doei, Arthur.

-- 
  /\    / |      arthurvl@sci.kun.nl      | Work like you don't need the money
 /__\  /  | A friend is someone with whom | Love like you have never been hurt
/    \/__ | you can dare to be yourself   | Dance like there's nobody watching

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Re: [LARTC] route with two uplinks actually slower than one

[William L. Thomson Jr.]

John,
	Keep in mind this is not true load balancing. It's simple put a crude
way to use more than one connection as a single gateway from the inside,
and to have some level of redundancy. As mention by Arthur, you only
benefit from multiple requests/users. Single transfers won't tell you
much of anything.

	In my case when I has two SDSL lines things were much faster. Now that
I am down to one things are slower. So I have had an opposite
experience.

-- 
Sincerely,
William L. Thomson Jr.
Support Group
Obsidian-Studios, Inc.
3548 Jamestown Ln.
Jacksonville, FL 32223
Phone/Fax  904.260.2445
http://www.obsidian-studios.com

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