Connection Groups; Virtual Servers - Netscape ENTREPRISE SERVER 6.1 - 04-2002 ADMINISTRATOR Administrator's Manual

Virtual Servers Overview
In addition, you specify the number of acceptor threads (sometimes called accept
threads) in the listen socket. Accept threads are threads that wait for connections.
The threads accept connections and put them in a queue where they are then
picked up by worker threads. Ideally, you want to have enough accept threads so
that there is always one available when a new request comes in, but few enough so
that they do not provide too much of a burden on the system. The default is 1. A
good rule is to have one accept thread per CPU on your system. You can adjust this
value if you find performance suffering.

Connection Groups

Each listen socket has at least one connection group associated with it. When you
create a listen socket, a connection group is also created which contains the default
virtual server you specified for the listen socket. The IP address for this connection
group is .
default
If your listen socket has an IP address of or , you can add multiple
0.0.0.0 ANY
connection groups that respond to particular IP addresses. Using this functionality,
you can set up virtual server with dedicated IP addresses.
For each listen socket, there is always a connection group that is the default
connection (the IP address shows as ). If the listen socket has a specific IP
default
address, this default connection group is the only one available. If the listen socket
listens on any IP address, the default connection group is the one used if the
request doesn't find a specific IP address match among the other connection
groups in the listen socket.
When you install your server, one connection group is created by default for the
default listen socket . The IP address for the connection group is , the
ls1 default
port is , and the default virtual server is the default server created when you
80
installed.
For each virtual server you select the connection group or groups it responds to.
You do not do this for the class as a whole: the connection group information is
independent of the virtual server classes.

Virtual Servers

To create a virtual server you must first decide which class you want it to belong to.
Next you need to decide what kind of virtual server you want. To create a virtual
server, all you need to specify is a virtual server ID, one or more connection
groups, and one or more URL hosts.
Chapter 11 Using Virtual Servers 251