Sharp JX-9500H Instrukcje Operacyjne Pobierz pdf (Strona 13)

Xprint F.A.Q. Document revision 10 (16.09.2008)

Page 13/89

A.18 Which Xprint concepts can be used to ensure availability of the print

service ?

Basically, availability of the print service consists in:

• Be able to access to configuration information (hosts, servers, devices…)

• Be able to access to resources (filters, loadable resources,…)

• Be able to submit new jobs

A step further concerns the recovery of the already submitted jobs on a crashed server

The three first points are supported directly by Xprint as described in the following section "Basic High Availability"

The additional support of the job recovery is explained in the section "Enhanced High Availability"

1. Basic High Availability:

Xprint provides internally two features ensuring a basic high availability: the device group for the printing and the

replicated database mechanism for the product management.

1. The device group for the printing

The device group is an Xprint resource providing the possibility to associate a set of printing

devices with a logical name. The usage of this name as print job destination automatically

requests Xprint to use the best fitting device belonging to the list. Therefore, if the same physical

printer is defined on several Xprint hosts, this printer will be accessible as long as one of these

Xprint hosts is running.

The following picture presents this feature: The printer is LAN connected and is defined on both

Xprint hosts "Host-B" and "Host-C". The device group name is "Printer1" and gathers the two

devices "Printer1B" (printer definition on Host-B) and "Printer1C" (printer definition on Host-C). By

this way, a user or an application residing on Host-A and using the destination name "Printer1"

can access the physical printer as long as "Host-B" or "Host-C" is running.

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Sharp JX-9500H Instrukcje Operacyjne Strona 13