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While three-tier architecture has far greater complexity, it also allows for greater
scalability. The architecture selected for a solution depend on your business
requirements, the type of application deployed, and the number of planned users.
In most cases, if you have to scale your applications, use a two-tier or three-tier
architecture. Smaller clients might prefer to implement a
implementation, simply because it is easier to manage and the number of users
supported can be handled by the three-in-one solution.
Three-tier
Clients
Two-tier
Clients
Three-in-one
Clients
Figure 2-5 Enterprise solution architectures
2.7.1 Microsoft SQL Server 2005
Microsoft SQL Server 2005 has many features that allow it to scale from a small
single-user database to a huge enterprise-wide, mission-critical, multi-user
database. This section highlights these features and discusses how they are
relevant to server consolidation.
Support for 64-bit computing (x64)
The combination of Windows Server 2003 for x64 and SQL Server 2005 for x64
offers directly addressable physical memory up to the memory limit of the
operating system: 32 GB for Windows Server 2003 Standard Edition, and
80
Planning, Installing, and Managing the IBM System x3950 M2
Web servers
Web servers
Web, Application and
Database servers
three-in-one
Application servers
Database servers
Application and
Database servers
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