cold/warm/hot server

A warm server is a backup server that is turned on periodically to receive updates from the server being backed up. Warm servers are often used for replication and mirroring.

A hot server is a backup server that receives regular updates and is standing by ready (on hot standby) to take over immediately in the event of a failover.

As part of its Software Assurance licensing program, Microsoft currently offers free software licenses for cold servers intended for disaster recovery. It does not offer free licenses for warm or hot servers.

Read more about cold/warm/hot server: - SearchWin2000.com provides an article that explains Microsoft's plan to support cold servers. - Microsoft provides more information about its criteria for licensing cold, warm, and hot servers.

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