sorry for the delay..
thanx a lot to those who answered: Rich Kulawiec, Khanh Vo, Luc Amouriaux,
Carlos Daniel Galicia
my original question was:
> We'll soon be directly connected to Internet and be running
> Netscape Proxy server for the all Internet traffic. We have
> a network of a little over 1000 IP hosts ( a big campus network
> with nearly 3000 users ). Since we don't have past Internet
> experience, my question is what configuration of a Sun computer
> is recommended, in terms of RAM, CPU and disk size ( for web caching).
- Don't bother buying Netscape's server and a Sun -- too expensive.
Instead, buy a garden-variety PC, put Linux on it, and run the Apache
server in caching mode. *Much* cheaper. Should suffice for your needs --
and if it doesn't, you can easily scale the solution by adding more machines
of the same type and using round-robin DNS to distribute the load. My guess
is that you could scale this up to half a dozen systems before you even
got close to the cost of a single Sun to handle the equivalent workload.
- 1. You don't want to cache URL, turn it off.
2. CPU resource consumption is minimal.
3. RAM utilization is a beast. I do not know why Netscape create such huge
executable for such a simple task. Each spawned process consume 3.6Mb of
memory. For 1000 possible users, you will need at least 64 pre-spawned
hence at least 256MB RAM if you don't want swaping, and believe me, you
don't want swaping.
4. Disk IO is very high of course unless you do not cache. You have to balance
the load on your disks wisely.
5. ns-proxy processes go stale after a couple of days. That means, the number
of alive processes can be 64 but the number of active processes are much
less than that. Our solution right now is to restart it.
- Whith these amount of users, I use a Proxy 2.53 on Solaris 2.5.1,
SparcStation-4 128 Mo Ram, 110MHz. This have been working too whith only
64 Mo Ram, but sometimes request was not treated so fast than whith 128 Mo.
Approximatly 15% of request are served with cached data ( 300 Mo of disk
The cache is sometimes working misteriously: some pages are never cached
despite my efforts. Except that, all is working fine since I stop and start
the Netscape Proxy every morning.
- Assumming that all your 3000 users will be using your proxy, perhaps
you'll have to use a very large machine, wih 2 or more CPU's,
512+ MB of RAM and 20 or more GB of disk for caching,
You will also need a very fast network card, and a pretty good internet
A nice choice would be a Ultra Enterprise 2 or better, but not less,
and perhaps you'll be interested in running netra software on the server
wich makes a lot easier to maintain and manage an internet server.
I have a Ultra Enterprise 2 with 1 200 MHZ cpu, 128 MB of RAM,
and 8 GB of HD, running Solaris 2.5.1, with Netscape Proxy server 2.5
I have 2 NIC, one connected to the internal network(and using the proxy)
and the other connected to a router, in a cross over configuration, and a
128 Kbit link to the internet.
I only have about 50+ users, but the machine and the proxy's performance is
as an addendum to the last answer, I heard the Sun's announcement
soon after I posted my question to sun-managers list, about netra
proxy cache server and array with ultrasparc-II 250Mhz, 128MB RAM, 8.4GB
disk with on-the-fly scalability, load balancing and failover features..
This archive was generated by hypermail 2.1.2 : Fri Sep 28 2001 - 23:12:29 CDT