Specifications

Overview of License Balancing and Redundant License Servers
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By default, the leader is the first license server in the pool you start up. However,
Wrlftool or rlftool can be used to set the priority order of the license servers. If
the leader redundant license server goes down, the next highest-priority
redundant license server becomes the leader in turn.To guarantee that a certain
license server becomes the leader, use Wrlftool/rlftool to give that license server
a preference number of 1 and start it first before the other license servers.
The leader synchronizes communication between the license servers in the pool.
The leader also makes sure that all the license servers in the pool are using the
same version of the redundant license file. If this file is changed on one of the
license server computers, after one of the license servers is stopped and restarted,
the leader detects the change in the file and automatically updates the rest of the
license server computers to the newer version.
If a license server exhausts its token allocation, it will ask the leader to borrow
tokens from other license servers. If tokens are available from any other license
server, the leader will take away the unused tokens and give them to the
requesting license server. The auto-borrowing mechanism helps in load
balancing also. Based on requests, the tokens get distributed among the license
servers after some interval of time into a pattern that reflects real token use,
leading to a balanced system.
Note Redistribution of tokens only occurs if license borrowing is turned on.
Majority Rule
Your vendor may require that your redundant license servers use majority rule.
This dictates that a majority (over half) of the redundant license servers must be
up and running for a request for that license to be serviced. For example, if you
have defined five redundant license servers and majority rule is in effect, at least
three of them must be up and running or a request for that license will fail.
The Redundant License Free Pool
In addition to distributing license tokens among redundant license servers,
SentinelLM may also place some of those tokens in a free pool. (You can see
how license tokens are distributed among redundant license servers and how