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Google DNS Cache

Does anyone know how often it is being updated at the moment?

     
3:41 pm on Apr 16, 2004 (gmt 0)

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I have been advised to move my sites to different ip addresses.

How long does google hold the DNS information in their cache?

Should I leave the old sites at the old ips up for a month until I see the googlebot in my logs?

11:28 pm on Apr 16, 2004 (gmt 0)

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A month might not be necessary, but if you can that's a good number. It takes a couple weeks at a minimum, and really depends on the ip that happens to be crawling you at the time and whether it has it cached.

I moved a site and had hits to the old IP for over a week, but less than two (big site, lots of crawls on a regular basis). A month is probably safe.

11:36 pm on Apr 16, 2004 (gmt 0)

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That's probably a good idea. I am moving a colocated server to in-house next week sometime to better defend it against scrapers etc. I need to have a finger on the firewall and telecom line to do what I need and I can't have that with the remote datacenter. I had planned on running duplicate servers for a time, but would not have probably though twice about killing the colocated server after a week or two.
5:26 pm on Apr 17, 2004 (gmt 0)

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It certainly wouldn't hurt if you can leave it up for that long, but I would thing a week or two at the outside should be fine. I'll try to ask if I see a crawl person in the halls.
9:49 am on Apr 19, 2004 (gmt 0)

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Many thanks for your replies. I know this issue had been covered in the past but the threads weren't exactly recent which is why I thought it would be best to double check.
 

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