Hi SeoMoz,
From time to time my server crashes during Rogerbot's crawling escapades, even though I have a robots.txt file with a crawl-delay 10, now just increased to 20.
I looked at the Apache log and noticed Roger hitting me from from 4 different addresses 216.244.72.3, 72.11, 72.12 and 216.176.191.201, and most times whilst on each separate address, it was 10 seconds apart, ALL 4 addresses would hit 4 different pages simultaneously (example 2). At other times, it wasn't respecting robots.txt at all (see example 1 below).
I wouldn't call this situation 'respecting the crawl-delay' entry in robots.txt as other question answered here by you have stated. 4 simultaneous page requests within 1 sec from Rogerbot is not what should be happening IMHO.
example 1
216.244.72.12 - - [05/Sep/2012:15:54:27 +1000] "GET /store/product-info.php?mypage1.html" 200 77813
216.244.72.12 - - [05/Sep/2012:15:54:27 +1000] "GET /store/product-info.php?mypage2.html HTTP/1.1" 200 74058
216.244.72.12 - - [05/Sep/2012:15:54:28 +1000] "GET /store/product-info.php?mypage3.html HTTP/1.1" 200 69772
216.244.72.12 - - [05/Sep/2012:15:54:37 +1000] "GET /store/product-info.php?mypage4.html HTTP/1.1" 200 82441
example 2
216.244.72.12 - - [05/Sep/2012:15:46:15 +1000] "GET /store/mypage1.html HTTP/1.1" 200 70209
216.244.72.11 - - [05/Sep/2012:15:46:15 +1000] "GET /store/mypage2.html HTTP/1.1" 200 82384
216.244.72.12 - - [05/Sep/2012:15:46:15 +1000] "GET /store/mypage3.html HTTP/1.1" 200 83683
216.244.72.3 - - [05/Sep/2012:15:46:15 +1000] "GET /store/mypage4.html HTTP/1.1" 200 82431
216.244.72.3 - - [05/Sep/2012:15:46:16 +1000] "GET /store/mypage5.html HTTP/1.1" 200 82855
216.176.191.201 - - [05/Sep/2012:15:46:26 +1000] "GET /store/mypage6.html HTTP/1.1" 200 75659
Please advise.
