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G&R

Mailbox pools for incoming connects

Contrast this functionality with ‘Starting applications on demand’ described

below.

You can start multiple instances of products accepting connects to the same

mailbox name on the same DSA node (SCID). Each instance should use a

different mailbox extension. The instances of the product will be allowed to

start execution, register the mailbox name and extensions for which they are

accepting connects, and act as a mailbox pool for applications connecting to the

mailbox name.

An incoming connect to a mailbox without an extension will be passed to a

random instance of the product which is accepting connects to a mailbox with

the correct name and that isn’t currently busy handling a session. An incoming

connect with a mailbox and extension will only be connected to a product

which is accepting connects that match both.

Example:

gspool -id gs1 -pc “lp -dprt1” -li dsa -ln -mn printer1 -mx p1

gspool -id gs2 -pc “lp -dprt2” -li dsa -ln -mn printer1 -mx p2

gspool -id gs3 -pc “lp -dprt3” -li dsa -ln -mn printer1 -mx p3

The three instances would start, all listening on mailbox printer1. Connects

to mailbox printer1 would be accepted by any of the Gspool instances that

was not already busy. Because the instance that is selected is random the three

instances should deliver print to a printer or printer queue with the same print

characteristics. If a certain application needs a specific one of the printers or

print queues that is otherwise used in the pool, then that application can use the

correct mailbox extension. Print output needing another type of printer

altogether would have to connect to another mailbox name, serviced by one or

more Gspool instances with a different printer or printer queue.

Starting applications on demand

You can start applications on demand when DSA or DIWS connections arrive.

All the G&R server-type applications that accept incoming connections (e.g.

Gspool, GUFT and Gmailer) can be started in this way, as well as user-written

applications using GlAPI.

Start on demand is especially useful for sites that need to emulate many

printers. Pre-starting one Gspool process per printer is an administrative

problem for sites that have hundreds of them.

Gline Line Handlers and Configuration

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Eicon Networks CX1 Installationshandbuch Seite 30