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6 Replication Server
2 Replication Server version 15.0 uses a newer version of the SySAM
licensing technology and an updated license format. On any one machine,
you can have only one instance of a license server running. You must make
some adjustments to use earlier versions with Replication Server 15.0. See
“Co-existing with earlier versions of SySAM” on page 8.
Using multiple network license servers
As part of a failover plan or a load-balancing system, you can have multiple
SySAM network license servers running a subset of the total licenses. The
SySAM network license servers can be connected by a local area network
(LAN) or by a wide area network (WAN).
This configuration is an excellent load-balancing mechanism for physically
distant locations. You can specify the local servers ahead of the remote servers
in the license location list.
To specify multiple license servers, set up the SYBASE_LICENSE_FILE or
LM_LICENSE_FILE environment variable to contain a list of license files,
where each license file refers to one of the network license servers. Replication
Server uses this list to checkout licenses, starting with the first server on the list.
If check-out fails for any reason, Replication Server attempts to check out
licenses using the second server in the list, and so on.
Although this configuration provides a basic level of failover protection, if one
or more license servers in the list are down, the licenses served by these servers
are no longer available, so the total number of available licenses is reduced
until the servers restart.
Note See “Redundant License Server Systems” in Chapter 4, “Selecting
License Server Machines,” of the FLEXnet Licensing End User Guide.
Setting up multiple network servers
To use multiple network license servers, install a network license server on two
or more servers using the instructions in “Installing a new license server” on
page 22.
To configure Replication Server to use multiple network servers, specify the
network server addresses in the SYBASE_LICENSE_FILE environment
variable as port@host separated by a semicolon. For example: