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On Tue, Apr 27, 2004 at 11:41:04AM +0100, Malcolm Turnbull wrote:
> pb wrote:
[snip]
> > -----------------------------------------
> >Would changing 15 to 60min Persistance on the LVS take
> >up a lot of memory and processing (CPU/load) overhead?
> >We're running 1gb of memory and dual pentium III.
> > -----------------------------------------
>
> I would think it would be fine, 1 GB should handle almost 8 million
> connections in the timeout period i.e. 60 mins (or 2mins with no
> persistence) Some one clever might correct me on that but I think its true.
I think Malcom is on the money here.
Keep in mind that each connection entry / persistance timeout
consumes something like 128bytes (actually, it might be a bit bigger
now, but it is still in that ball-park). You can do the maths
(actually you should, my brain has already checked out for the day),
but if you are getting 100 connections/s, for an hour, each from
a unique host, then you are still only going to end up using about
45Mb of memory for persistance entries. I doubt that will hurt you.
I would also be supprised if you are getting connections from
360,000 unique hosts per hour :-)
--
Horms
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