As a result this section discusses the following requirements:
??‘ Proper hardware sizing
??‘ Software requirements
??‘ Domain requirements
??‘ Exchange organization requirements
Hardware Requirements
One of the biggest changes that Exchange Server 2007 brought forth is the requirement for a 64 - bit
processor. Sixty - four - bit processing takes advantage of larger addressable memory, increased number of
log files, and improved performance. Thirty - two - bit versions of Exchange Server 2007 are for lab use
only and are not supported in a production environment. The 32 - bit management tools, however, are
supported for production on 32 - bit machines. Intel ??™ s Extended Memory 64 Technology (EM64T)
processor technology and AMD ??™ s Opteron line of AMD64 processors are supported 64 - bit processors,
however Intel ??™ s Itanium IA64 processors are not supported.
With Exchange Server 2007, Microsoft committed to reducing the number of disk I/O operations per
second (IOPS) that mailbox servers would need by up to 70 percent. One way they were able to
accomplish this feat was by using the larger memory space available via 64 - bit processing. The Exchange
database process which uses the Extensible Storage Engine (ESE) is now able to cache more of
the database data in memory, thus it requires less reads from the disk subsystem.
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