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Virtualizing: Microsoft® Tier 1 Applications with VMware vSphere™ 4 by Hemant Gaidhani, Alex Fontana, Charles A. Windom Sr.

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Exchange High Availability

Exchange Server high-availability options and features have changed with the evolution of the Exchange product. Microsoft went from stand-alone servers to two-node clustering, and over time and new releases of the Exchange product, it offered four-node clustering.

Exchange Server 2003 and the Windows Server product increased the clustered node numbers to eight nodes, with a seven-active-and-one-passive clustered configuration. Although clustering could provide server and service availability, it was still not considered by the industry as a true highly available solution.

In a true highly available solution, you will find the following characteristics:

  • Server or hardware availability
  • Service availability
  • Data redundancy ...

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