Installation guide

Unserved Licenses Served Licenses
Unserved Standalone Seat (SS) licenses do not allow
product use via Remote Desktop Connection or other
terminal services clients.
Products can be used via Remote Desktop Connec-
tion or other Terminal Services clients, irrespective
of the type of license in use.
Fault Tolerance, License Grace, and Redundancy
Sybase products check out licenses on start-up, and perform periodic heartbeat checks to
verify that licenses are still available. If a license is unavailable, the product determines
whether it can be awarded on grace.
The grace period starts from the time a license was last in use and persists for 30 days for server
products and 15 days for tool products. At the end of the grace period, the product performs an
orderly shutdown, if running, or fails to start up, unless the license (or a replacement license)
becomes available, at which point the cycle continues with the heartbeat, noting the last use of
the license.
This tolerance for temporary licensing failure is usually sufficient. However, in certain
circumstances, you may choose to use “three-license-server redundancy.” For example:
• A grace period is not provided for Sybase Floating License (FL) type licenses.
• Standby copy systems rarely qualify for grace as they are unlikely to have been used within
the last 30 days.
• Company policy dictates the use of redundancy.
For three-server redundancy, use three machines that each:
• Run the same version of the SySAM license server.
• Have good intermachine communication.
• Use a separate copy of the same license files.
A product that uses per-processor licensing checks out a license quantity equal to the number
of processors it can use, or awards runtime grace if an insufficient quantity is available. If the
number of processors is dynamically increased while the product is running and the product is
unable to check out additional licenses, runtime grace is also awarded. If the additional
licenses are not made available within the runtime grace period the product shuts down.
Decreasing the number of processors that a product can use while it is running does not reduce
the required license quantity. You must restart the product on the correct number of
processors.
Served License Deployment Model
When you choose the served license deployment model, licenses are deployed to one or more
SySAM license servers.
After you install the required license servers and generate served licenses, you can install your
Sybase products. You can configure the products to obtain licenses from one or more license
servers.
CHAPTER 5: Planning Your Adaptive Server Installation
16 Adaptive Server Enterprise