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Users have come to expect reliability, so if your business depends on its Web presence, you can really no longer afford to trust critical applications to individual servers. Apache on Linux is a good start, but without providing redundancy and failover protection, you're vulnerable to system outages.
One solution is to spread the workload across a number of real Web servers, then front them with virtual servers that can float an IP address among themselves, independently of the real servers. IBM developers Eli Dow and Frank Lefevre show how they created such an environment using HA-enabled Apache servers to handle the workload and Linux Virtual Server Directors to maintain an always-on IP address:
Until next week,
Tom Young, dwnews@us.ibm.com
Linux zone editor
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