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NOW is running as a 3-tier client/server system. The database reside on a central
computer, known as server, and be shared among several users. To avoid database
to be accessed directly outside, a application server is running to receive client
request and retrieve or update data from / to database. As the core business logic
is located in server application running on a server, it can also reduce the loading
at the client’s computer.
The below is the standard structure of NOW architecture.
Server Requirement
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Memory
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2 Gigabyte (GB) of RAM or more
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Processor (CPU)
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2-Gigahertz (GHz) processer or higher
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Storage
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40GB HDD or above
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Operation System
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Microsoft Windows Server 2008
Microsoft Windows Server 2003
Microsoft Windows 7 (Home Premium, Professional, Enterprise, Ultimate Editions)
Microsoft Windows Vista (Home Premium, Business, Enterprise, Ultimate Editions)
Microsoft Windows XP Professional
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Database
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Microsoft SQL Server 2008
Microsoft SQL Server 2005
Microsoft SQL Server Express 2008 (Max. 4GB Database size)
Microsoft SQL Server Express 2005 (Max. 4GB Database size)
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Web server
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Internet Information Services (IIS) (available in Windows CD)
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Server Suggestion for high usage
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Memory
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8 Gigabyte (GB) of RAM or more
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Processor (CPU)
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Multi-core 2-Gigahertz (GHz) processor or higher
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Storage
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100GB HDD or above
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Operation System
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Microsoft Windows Server 2008
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Database
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Microsoft SQL Server 2008
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Web server
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Internet Information Services (IIS) (available in Windows CD)
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Server Suggestion for low usage
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Memory
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3 Gigabyte (GB) of RAM or more
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Processor (CPU)
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2-Gigahertz (GHz) processor or higher
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Storage
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40GB HDD or above
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Operation System
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Microsoft Windows Server 2008
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Database
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Microsoft SQL Server 2008 /
Microsoft SQL Server Express 2008 (Max. 4GB Database size)
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Web server
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Internet Information Services (IIS) (available in Windows CD)
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Client Requirement
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Memory
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512 Megabyte (MB) of RAM or more
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Processor (CPU)
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1-Gigahertz (GHz) processor or higher
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Storage
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About 30MB for full installation of NOW client
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Operation System
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Microsoft Windows 7
Microsoft Windows Vista
Microsoft Windows XP
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If the usage is low and only one user required to access the system, NOW can also
be run in a "All-in-One" Solution. That is, a standalone computer is acted as server
as well as client.
All-in-One Standalone Computer Requirement
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Memory
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2 Gigabyte (GB) of RAM or more
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Processor (CPU)
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2-Gigahertz (GHz) processor or higher
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Storage
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40GB SATA or above
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Operation System
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Microsoft Windows XP Professional or above
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Database
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Microsoft SQL Server Express 2008 (Max. 4GB Database size)
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Web server
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Internet Information Services (IIS) (available in Windows CD)
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