Re: Ruby on the Grid - Deploying on Virtual Infrastructure

Jesse Proudman wrote:
> Out of curiosity, have you ran any internal tests to
see the
> performance you can get with the Pound software based
load balancer
> bundled with App Logic?  We saw miserable performance
numbers which
> is why we've switched to hardware based solutions.
> 
> How much load are you running on this grid you've got
running?

What kind of miserable performance numbers were you seeing?
We haven't 
used that appliance extensively but the instance we created
that 
balanced 3 Apache servers didn't show any unusual
degradation. The 
entire grid environment is load balanced and redundant by
default so 
additional load balancing is unnecessary for most
applications.

If you were using one of the original evaluation grids that
3tera was 
offering, that likely had a lot to do with any service
impact you might 
have seen (those were running on seriously old hardware). We
are using 
Dual Opteron 2200 with 4 GB of RAM minimum. That's likely a
big reason 
why we're not seeing poor performance (still not sure why
3tera let 
people on those - we couldn't use them and so we setup our
own).

That's interesting that you mention poor performance with
the Pound 
balancer, it's been used with Ruby quite a bit. Since it
runs through 
the gigabit backend network on the grid and has such a small
footprint 
it's quite suited for balancing Apache, Mongrel, Lighttpd.
What were you 
trying to run on it? Did you get a load balanced clustered
configured in 
AppLogic that worked?

We have run up to 4000 simultaneous connections on a single
distributed 
application (no Pound LB). That same app could have probably
taken 
another 3000 connections. That was with a single (heavily
resourced) 
MySQL instance as well.


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Was this using rails as the processing engine?

--

Jesse Proudman
Blue Box Group, LLC

p. +1.800.613.4305 x801
e. jesseblueboxgrp.com


On May 1, 2007, at 6:50 AM, ruby-forum-incomingandreas-s.net wrote:

> We have run up to 4000 simultaneous connections on a
single  
> distributed
> application (no Pound LB). That same app could have
probably taken
> another 3000 connections. That was with a single
(heavily resourced)
> MySQL instance as well.


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