Alex Rousskov wrote:
> > What range of IP's will the clients be using? The servers? (I assume
> > the servers will be presenting IPs from the whole or most of IP space).
> > I assume that the IP space for the clients and servers are separate?
> There will be thousands of client IPs and few server IPs, depending on
> the load. For example, each Polygraph robot can be configured with a
> single unique IP address and can be told to emit 0.5 requests per
> second. To get 500 req/sec, one would use 1000 robots (1000 IP
> addresses), and so on. One client PC can host thousands of robots.
> There will be one or a few simulated servers per server-side PC. The
> exact formula will be decided by the participants.
> All IP addresses are likely to come from the "reserved" address spaces
> (10.x and such) unless there are very good reasons to make them truly
> random. Note that non-flat network configurations will require routing
> devices in the test setup. Hopefully, we can accommodate most IP
> hashing algorithms without making the setup too complex.
I had assumed (incorrectly) that the test setup would simulate a
relatively few clients connecting through an L4 switch to web-caches
that were fetching pages from a large number of websites (the whole
> > Does the web content provided by the servers have "locality",
> > ie will a particular URL or piece of content be only presented
> > from one box.
In this case the web-caches would develope locality which the L4 switch
could use to its advantage.
I now see that you are simulating a setup with an L4 switch in front
of a bank of presumably identical webservers and a large number clients
are coming in from the internet.
> Polygraph can support both environments. Participants will probably
> have to agree on one.
If the websites are non-identical, this will be known ahead of time
and locality won't develope or change, it will be there from the start.
So there is no decision on the number of unique web-sites that the servers
will be generating, or on the level of duplication? This will be decided
by the participants? (I can handle either, I just need to plan for
-- Joseph Mack PhD, Senior Systems Engineer, Lockheed Martin contractor to the National Environmental Supercomputer Center, mailto:firstname.lastname@example.org ph# 919-541-0007, RTP, NC, USA
This archive was generated by hypermail 2b29 : Tue Jul 10 2001 - 12:00:18 MDT