web services - Too aggressive bot? -

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i'm making little bot crawl few websites. now, i'm testing out right , tried 2 types of settings :

  1. about 10 requests every 3 seconds - ip got banned, said - ok , that's fast.

  2. 2 requests every 3 seconds - ip got banned after 30 minutes , 1000+ links crawled .

is still fast ? mean we're talking close 1.000.000 links should message "we don't want crawled ?" or still fast ?

thanks.

edit

tried again - 2 requests every 5 seconds - 30 minutes , 550 links later got banned .

i'll go 1 request every 2 seconds suspect same happen. guess i'll have contact admin - if can find him.

here guidelines for web crawler politeness.

typically, if page takes x amount of seconds download, polite wait @ least 10x-15x before re-downloading.

also make sure honoring robots.txt well.


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