Limitations

There is no hard limit to how many devices can be added to the server, but HP will support up to

1000 devices per server with DSS 4.91. Note that this limit may change in the future, so make sure to read the release notes when updates are available and look for information on the HP Website at: www.hp.com/go/dss.

Features and factors that limit scalability

Most features offered by DSS are fairly lightweight in terms of server processing, with the exception of the following.

●Optical Character Recognition (OCR)

●High compression PDF

●LAN fax with notification support

Other factors that limit scalability include the following.

●Utilization/scan job volume

●Routing jobs through DSS

●Very large DSS address books

●Complex workflow design

Recommendations

Given the factors stated above, DSS administrators should consider the following approaches to improving the scalability of DSS:

●Limit OCR to specific workflows.

●Configure devices to send e-mail directly via the SMTP gateway, rather than via DSS.

●Configure devices to use direct LDAP address book.

●Use the notification features of the LAN Fax server.

●For OCR intensive environments, use high performance servers and use multiple servers to divide the load.

It is recommended to perform a pilot test of a given DSS configuration prior to wide scale roll-out. During the pilot administrators should make sure to test all the required DSS features on a limited number of devices while using the Windows performance monitoring tools to assess the impact on server performance.

Licensing

In order to use the features of this version of the DSS, you must purchase and install at least one device license. These licenses come in bundles of 1, 5, 10, 50 and 250 device licenses (device licenses are sometimes also referred to as "license seats").

Each seat allows you to enable DSS features on one DSS-enabled device. Adding licenses is cumulative and there is no limit to the number of license seats you can add to one server. SeeScaling the DSS server on page 29 for information about how to scale the DSS server.

30 Chapter 3 Installation and configuration

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