Take the 2-minute tour ×
Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

As I understand it, everything from IIS7 and beyond can simultaneously support 32 and 64 bit applications... So why is "Enable 32 bit applications" an option w/ IIS any more? Why would it not just automatically support both?

share|improve this question

2 Answers 2

up vote 7 down vote accepted

Several third party components still have no 64-bit option and in that case a 32-bit environment is required in order for those to function.

Take, for example, Excel. If you're writing a web app that will dump output to an Excel sheets and you need to use the Microsoft Interop components then you're forced to operate in a 32-bit environment. Or, if you have a web app that uses ADO to interact with Excel you're also going to be working in 32-bit.

In response to the last bit about why not automatically support both (and in conjunction with DJ Pon3's answer), Microsoft is actively trying to push for pure 64-bit environments. With that in mind it is easily followed that 32-bit options would be disabled by default. Which makes my above example rather humorous.

share|improve this answer

Why would you want your application framework / environment to support things you knew you would not use? Every time you don't run un-needed code you potentially improve performance by using less resources, you improve robustness by having less code hence less potential for errors and you improve security by having a smaller attack face.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.