ISAPI Rewrite enterprise site examples

looking for an update to an old question

[CliffR]

Basically I want to ask this exact question, but this post is too old to give it a bump:

[webmasterworld.com...]

Looking for enterprise level sites using latest versions of ISAPI_Rewrite. We get 25M+ pageviews per month, so we're very concerned about performance issues.

Suggestions for current alternatives are certainly welcome.

Thanks,
CliffR

[f00sion]

If it is a .net project why not roll your own solution with an http module? There are probably hundreds of examples across the web on how to do it, should always be more "enterprisey" to not use a 3rd party filter and stay within the .net runtime. We are successfully using an httpmodule on a site that has 200M+ page views/month.

[CliffR]

Thanks for your reply. I'm certainly not opposed to developing a solution in-house, but 1) our engineers don't understand why the heck I even need to rewrite URLs in the first place, and 2) since the little bit of server admin/programming I've done has been in a LAMP environment, I really don't know how to specifically define all of my requirements. I just know I want something that allows me to create URL rewriting rules similar to Apache's mod_rewrite.

I did research this, but I continually ran into a lot of "if, ands, and buts" that I didn't understand. Would you be willing to provide some rough pseudo code indicating the appropriate modules? We're using IIS 6.0 - moving to IIS 7.0 in Jan.

[sunpost]

here is a popular asp.net component for rewriting...
[urlrewriting.net...]

typically, an ISAPI filter should be faster than an HttpModule, so i would still check with Helicon Tech about ISAPI_Rewrite.

In both cases, minimizing the number of rules will provide the best performance gain.

[coffeebean]

ISAPI_Rewrite is rock solid. Performance won't be an issue. If you don't believe me just run some load tests yourself on a dev box.

[carguy84]

we run ISAPI Rewrite and were concerned about the same thing. Actually, I posted in that other thread. There is a performance drop when running the rewrite(as would be expected), but it was minimal and only noticable under insanely high loads( > 250 pageviews/second). If you are even close to that, you're no doubt running multiple front end servers, so you shouldn't have anything to worry about.

Chip-