[TriLUG] LVS performance/scale

[Ken Mink]

I too used LVS at a former employer. Our configuration was almost
identical to Jon's. We ran LVS on a pair of machines, one was a warm
backup and would take the IPs from the first if the first failed.

LVS scaled well. We were using some low end machines and never had a
performance problem. Our actual traffic was pretty close to what Jon
tested and they just hummed.

LVS is also on of the best documented OpenSource projects. There is a
QuickStart guide that does a very good job of covering most
configurations. If you need more the full guide is huge and well
written.

Ken

On Fri, 2002-12-13 at 16:36, Jon Carnes wrote:
> I used LVS at a "former employer" and the technology is extremely
> scalable.  I highly recommend it!  In our tests using a fairly low-level
> system for the redirector we simulated attachments from 20,000 clients
> in an hour.  There were absolutely no problems.
> 
> We had the LVS systems front-ending our DMZ so all the servers were
> reached via masqueraded connections (or reverse masqueraded connections
> if you will).  It seemed to scale as well as a masquerading firewall
> would - so you might want to think of it in those terms.
> 
> I think that if you have a lot of simultaneous connections (like ~1000)
> then you'll definitely need to drop down the time that it stores
> connection information.  That shouldn't be a big deal.
> 
> How does the Oracle Forms application work?  Is the server-side doing
> all the work and needing to store states?  If so, then you can adjust
> the LVS to have the same client return to the same server (as long as
> that server is up) for the length of time that you store your states on
> the server.
> 
> If the application is driven by URL tags and client side remembered
> states, then of course it doesn't matter which server the LVS hands you
> off to.
> 
> Good luck - Jon Carnes
> 
> On Fri, 2002-12-13 at 13:07, John Turner wrote:
> > Do we have any LVS users on the mailing list?
> > 
> > I am working with someone who was concerned about the maximum number of 
> > connections that a single Linux Virtual Server Director (LVS-DR) could 
> > handle.
> > 
> > Also does anyone know of a site using LVS to load balance a Oracle 
> > Forms application using the Java client?
> > 
> > Thanks,
> > John
> > 
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