Does Google make continued attempts to crawl an old page one it has followed a 301 to the new page?

[RossFruin]

I am curious about this for a couple of reasons.

We have all dealt with a site who switched platforms and didn't plan properly and now have 1,000's of crawl errors. Many of the developers I have talked to have stated very clearly that the HTacccess file should not be used for 1,000's of singe redirects. I figured If I only needed them in their temporarily it wouldn't be an issue. I am curious if once Google follows a 301 from an old page to a new page, will they stop crawling the old page?

[CleverPhD]

It will keep on crawling.  I have seen 6 months to 1 year later they come back.  Especially if there are links from other websites pointing to your old URLs.

Why they do repeat crawls on 301s and 404s for that matter is that they know how much the web changes and assume that there may have been a mistake and so want to double check.    Also, you have to consider, they will not recrawl 1000s of pages all at once.  They will probably pick up the most popular URLs first as they crawl them more often and then the less popular pages later.

IMHO. You will need to find a long term solution in place.

Here is the why you dont want to use htaccess

http://stackoverflow.com/questions/209209/htaccess-redirect-performance

One suggestion for Apache - RewriteMap

http://httpd.apache.org/docs/2.0/mod/mod_rewrite.html#rewritemap

That or all the developers who are telling you not to use .htaccess should have at least 2 solutions to use instead that should work.  Go back to them to solve the issue.