Apple Mac OS X Server Print Service Administration For Version 10.4 or Later Manual do Utilizador descarregar pdf (Página 18)

18 Chapter 1 About Print Service

Workload Distribution Using Printer Pools

Each print service queue you set up is assigned to a single printer. The Common UNIX

Printing System (CUPS) supports a special queue called a printer class or printer pool,

which is essentially a queue with more than one printer assigned to it.

A printer pool offers a number of advantages over single-printer queues in high-

volume or high-availability printing environments:

• Print jobs are assigned to the next available printer in the pool, so you can have as

many jobs printing simultaneously as you have printers assigned to the pool.

• If a printer assigned to the pool becomes unavailable for any reason, the other

printers in the pool continue to print waiting jobs.

You can set up a printer pool using Settings > Create Pool in the Printer Service in

Mac OS X Server 10.4. After creating the pool, you can add and manage the resulting

pool queue in print service as you would any other queue.

Things to consider when creating a printer pool

The purpose of a printer pool is not to compete with each printer’s queue but to

replace it. A good practice is not to share a printer individually when it’s also shared in

a pool.

It is also good strategy to group printers of like make and model together to ensure the

each printer in the pool has the same printing capabilities. For instance it would defeat

the purpose of a printer pool if all but one printer were capable of printing color.

Important: The capabilities of the printers in a printer pool are typically defined by the

first printer added to the pool list. Jobs given to lesser capable printers in the pool may

be rejected by the assigned printer and fail.

You can also create a printer pool using commands in Terminal. For more information,

see the chapter on print service in the command-line administration guide.

Multiple Network Interface Support

In Mac OS X Server, print service automatically operates across all interfaces for which

TCP/IP-based printing protocols are configured. These include CUPS/IPP, LPR, and SMB/

CIFS.

Similarly, print service automatically operates across all interfaces for which AppleTalk is

enabled. Refer to the file services administration guide for more information on

AppleTalk set up and limitations.

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Apple Mac OS X Server Print Service Administration For Version 10.4 or Later Manual do Utilizador Página 18