Using Multiple License Servers

Configure SySAM-enabled products to obtain licenses from multiple license servers for load balancing or redundancy.

Note: This setup is limited by the number of unused licenses, including overdrafts, remaining on each license server. This means that you must purchase enough licenses so that each license server has sufficient licenses to service any product instance that may request one.

Set this up in one of two ways:

Sybase recommends that you create a license file that includes the two lines below. Create one of these files for each license server, where host is the host name for the license server and port is the port number on which the license server is listening. You need not specify the port number if the license server is listening on a port in the default port number range (27000 to 27009).
```
SERVER host ANY [port]
USE_SERVER
```
For example, to have the product look for licenses from one of three servers named: nyc, bos, and sfo, create three files in the default licenses directory of the product as:
```
# nyc.lic
SERVER nyc ANY 29733 
USE_SERVER

# bos.lic
SERVER bos ANY 29722
USE_SERVER

# sfo.lic
SERVER sfo ANY
USE_SERVER
```
When using such license files, the product loads the files using the directory sort order, so name the files according the preference of license servers to be used. For example, 1_bos.lic, 2_nyc.lic, 3_sfo.lic .
Alternatively, set the SYBASE_LICENSE_FILE or LM_LICENSE_FILE environment variables to a list of [port]@hostname values to specify each license server, where the port number is omitted if the license server is using the default port number range. Separate each license server with a colon on UNIX platforms and a semicolon on Windows platforms. For the example above, from a UNIX C shell, enter:
```
 setenv SYBASE_LICENSE_FILE 29722@bos:29733@nyc:@sfo
```
On Windows platforms, enter:
```
 set SYBASE_LICENSE_FILE=29722@bos;29733@nyc;@sfo
```