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What are FLEXlm redundant servers ?

April 26, 2017FLEXlm redundant servers

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What are FLEXlm redundant servers ?

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Top Redundant servers are a set of 3 servers designated to serve the same license file. The license file has 3 SERVER lines, one identifying each server. lmgrd is started on all 3 servers. One of the servers starts out as the master server and serves licenses. If the master goes down, another server takes over as master. Redundant servers require a quorum of 2 servers to be up, or no licenses are served.

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There’s 2 kind of redundancy available through FLEXlm: true redundant servers, and use of colon-separated list in $LM_LICENSE_FILE. To avoid confusion, only true redundant servers are addressed here. Redundant servers are a set of 3 nodes designated to serve the same license file. The license file has 3 SERVER lines. lmgrd is started on all 3 nodes. One of the servers starts out as the master server and serves licenses. If the master goes down, another server takes over as master. Redundant servers require a quorum of 2 servers to be up, or no licenses are served.