Should i leave www in the url?

I recently purchased a two year old website that has been indexed by Google.

if i put in site:mysite.com (about 10k pages in the index)
site:www.mysite.com (about 4k pages in the index)

I just finished moving the website to a new server. The server has the option where i can redirect all requests without the www. in the url to http://www.mysite.com.
So if somone type in the url address http://mysite.com. The server would automatically make it http://www.mysite.com/

I'm not sure google sees the site with and without the www as duplicant content.

What should i do..

Thanks

 

Keep the www. part and use the redirect offered by your host.

 

Choose one type of url and stick with it.

Having 2 types of url can lead to duplicate content and dilution of your backlinks and pagerank.

While you are doing it make sure that site.com/index.html redirects to site.com as this has the same effect.

 

I think www. is a god thing... Makes the URL longer to type... but people are used to it.

 

Go with www. as more then likely other webmasters will link to your site using this link format.

 

I'm not sure I'd go quite that far but I do agree it's probably the best choice

 

I'm pretty sure he would have meant "good thing"...