Requirements and advantages in Exchange and SQL were some of the primary factors for using the 64-bit version of 2003 over the 32-bit version. On the consumer side, 32-bit was the comfortable norm and 64-bit was factored in only when there were obvious gains. Few software vendors factored in 64-bit compatibility in their code until Windows Server 2008. Until Windows Server 2008, development for 64-bit products was not mainstream. The 64-bit server product was bleeding edge when it was introduced. The vast majority of Windows 2003 Server implementations were 32-bit. There is a Windows Server 2003 64-bit edition, but the adoption rate of that version was extremely low. In fact, hardware is actually the primary limiting factor over software. Windows Server 2012 Standard and above have a memory limit of 4TB. In a 64-bit world, the Windows OS version still controls memory limits, but the 64-bit address bar has been raised. Windows Server 2003 Standard had a limit of 4GB of memory, while Datacenter and Enterprise had a 64GB limit. Memory limits in 32-bit Windows Operating Systems (OS) depended on the version in use and the 32-bit address space. The key differences of 64-bit computing over 32-bit computing is more memory. This difference is exhibited the most in physical memory addressing. A 64-bit value exponentially holds a greater amount of data than a 32-bit. As the number of bits in a computational value increase, the amount of data the value can hold increases. Bits (binary digit) refer to the smallest units of computer data (a value of 1 or 0). 32-bit and 64-bit computing refer to a change in the instruction set for processors (CPUs) and how processors handle memory. One of the key points involved in moving off the Windows 2003 platform is going from 32-bit computing to 64-bit. In this blog I am going to discuss a topic that is a major factor in migration. Over the next few months, we will be presenting blogs with information on migrating from Windows Server 2003. To find out the information from the source and to get ideas on how to move forward, click here. It also means that if you have an issue and call in for Microsoft support, they will no longer open a support case for you. Meaning, after that date, there will be no more security fixes, hot-fixes, patches, or any other type of development for Server 2003 from Microsoft. On July 14, 2015, Windows Server 2003 Microsoft support will end.
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