Release 10.1A: OpenEdge Getting Started:
Installation and Configuration

Starting multiple brokers using the same protocol

You can use either the Progress Explorer or the command-line interface to start multiple brokers that use the same protocol. The -Mn parameter and a new parameter, Maximum Servers per Broker (-Mpb), determine the number of servers a broker can start. You can use the Progress Explorer to manage and configure server groups.

Using the Progress Explorer to start multiple brokers

You can use the Progress Explorer to start multiple brokers that use the same protocol. Start the Progress Explorer by double-clicking the Progress Explorer Tool icon in the OpenEdge program group. Follow the instructions in the Progress Explorer online help to start and configure brokers. See Chapter 10, "Configuration Basics," for more information about starting the Progress Explorer.

Using the command-line interface to start multiple brokers

Use the following commands to start two brokers that use TCP and start multiple servers each:

proserve db-name -S server-name -N network-type -H host-name -Mnn -Mpb n proserve db-name -S server-name -N network-type -H host-name -Mpbn -m3

db-name

Specifies the database you want to start. If the database is not in the current directory, you must specify the full pathname of the database.

-S service-name

Specifies the database server or broker process service name. You must specify the service name in a TCP network.

-N network-type

Specifies the network protocol, which is TCP.

-H host-name

Specifies the machine where the database server runs.

-Mn n

Specifies the maximum number of remote client servers and login brokers that the broker process can start.

-Mpb n

Specifies the number of servers that the login broker can start to serve remote users. This applies to the login broker that is being started.

-m3

Starts the secondary login broker.

You would enter the following commands to start two brokers that use TCP and start four servers each:

proserve db -S demosv1 -N tcp -H myhost -Mn 9 -Mpb 4 proserve db -S demosv2 -N tcp -H myhost -Mpb 4 -m3

As the example shows, the -Mn value must be large enough to account for each additional broker and all servers. If you do not specify -Mpb, the value of -Mn becomes the default.

You must include the -m3 parameter with every secondary broker startup command. While the -Mpb sets the number of servers a broker can start, the -m3 parameter actually starts the secondary broker.

If you start multiple brokers, you should also run the Progress Watchdog process (PROWDOG). PROWDOG enables you to restart a dead secondary broker without shutting down the database server.