Dear Nutch developers, I have had problems with a Nutch based robot during the last 12 hours, which I have now solved by banning this particular bot from my server (not Nutch completely for the moment). The ilial bot, which created considerable load on my server, was using the latest Nutch version - v0.9 - which is now also supporting the crawl-delay directive in the robots.txt.
The bot seems to have obeyed the directive - crawl-delay: 10 - as it visited my website every 15 seconds, which would have been ok, BUT it then submitted FIVE requests at once (see example log extract below)! 5 requests at once every 15 seconds is not acceptable on my server, which is principally serving dynamic content and is often visited by up to 10 search engines at the same time, alltogether surely creating 99.9% of the server traffic. So my suggestion is that Nutch only submits one request each time, when it detects a crawl-delay directive in the robots.txt. This is the behaviour, the MSNbot shows for example. The MSNbot also liked to submit several requests at once every few seconds, until I added the crawl-delay directive to my robots.txt. Best wishes Lutz Zetzsche http://www.sea-rescue.de/ 72.44.58.191 - - [03/Jun/2007:04:40:53 +0200] "GET /english/Photos+%26+Videos/PV/ HTTP/1.0" 200 13661 "-" "ilial/Nutch-0.9 (Ilial, Inc. is a Los Angeles based Internet startup company. For more information please visit http://www.ilial.com/crawler; http://www.ilial.com/crawler; [EMAIL PROTECTED])" 72.44.58.191 - - [03/Jun/2007:04:40:53 +0200] "GET /english/Links/WRGL/Countries/ HTTP/1.0" 200 15048 "-" "ilial/Nutch-0.9 (Ilial, Inc. is a Los Angeles based Internet startup company. For more information please visit http://www.ilial.com/crawler; http://www.ilial.com/crawler; [EMAIL PROTECTED])" 72.44.58.191 - - [03/Jun/2007:04:40:53 +0200] "GET /islenska/Hlekkir/Brede-ger%C3%B0%20%2F%2033%20fet/ HTTP/1.0" 200 60041 "-" "ilial/Nutch-0.9 (Ilial, Inc. is a Los Angeles based Internet startup company. For more information please visit http://www.ilial.com/crawler; http://www.ilial.com/crawler; [EMAIL PROTECTED])" 66.249.72.244 - - [03/Jun/2007:04:40:55 +0200] "GET /francais/Liens/Philip+Vaux/Brede%20%2F%2033%20pieds/ HTTP/1.1" 200 17568 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" 66.231.189.119 - - [03/Jun/2007:04:40:55 +0200] "GET /english/Links/Martijn%20Koenraad%20Hof/Netherlands%20Antilles/Sint%20Maarten/ HTTP/1.0" 200 17193 "-" "Gigabot/2.0 (http://www.gigablast.com/spider.html)" 74.6.86.105 - - [03/Jun/2007:04:40:56 +0200] "GET /dansk/Links/Hermann+Apelt/ HTTP/1.0" 200 30496 "-" "Mozilla/5.0 (compatible; Yahoo! Slurp; http://help.yahoo.com/help/us/ysearch/slurp)" 72.44.58.191 - - [03/Jun/2007:04:40:53 +0200] "GET /italiano/Links/Giamaica/MRCCs+%26+Stazioni+radio+costiera/ HTTP/1.0" 200 16658 "-" "ilial/Nutch-0.9 (Ilial, Inc. is a Los Angeles based Internet startup company. For more information please visit http://www.ilial.com/crawler; http://www.ilial.com/crawler; [EMAIL PROTECTED])" 72.44.58.191 - - [03/Jun/2007:04:40:53 +0200] "GET /english/Links/Mauritius/Countries/Organisations/ HTTP/1.0" 200 15624 "-" "ilial/Nutch-0.9 (Ilial, Inc. is a Los Angeles based Internet startup company. For more information please visit http://www.ilial.com/crawler; http://www.ilial.com/crawler; [EMAIL PROTECTED])"
