Crawler software for really big sites

Do you know any that can crawl up to 1 million pages?

[Josuah]

Does anyone have experience with a crawler software on big sites with around a million pages? When is not possible to do it by parts or categories.

I have tried <snip> and some other, but they can't manage all the data and the computers runs out of memory or similar.

Thanks.

[edited by: goodroi at 10:57 am (utc) on Mar 17, 2011]
[edit reason] Please no product mentions [/edit]

[goodroi]

To be honest I have not found one that had all the features I needed and ended up with a custom built one. You can search Google for product suggestions or just have a custom crawler built for you.

[Josuah]

I was thinking about programming it myself but I want to be sure before spending time on it..

Thank you.