Www1 www2 www3

Hello

Can you tell me if Google conisder www1, www2, www as duplicate content. These servers are for server load balancing not to trick Google.

I have just done

site:www.mydomain.com

www.mydomain.com 157,000 indexed pages
www1.mydomain.com 30,000 indexed pages
www2.mydomain.com 13000 indexed pages
www3.mydomain.com 15000 indexed pages
www4.mydomain.com 5989 indexed pages

So as a result for our homepage alone I can see that google have indexed
www.ourhomepage.com
www1.ourhomepage.com
www3.ourhomepage.com
www4.ourhomepage.com

Is this a potential problem or does Google identify this as server load balancing. If i am up the creek without a paddle - is there a simple solution

Thank you in advance

They are still different pages, in the same way that www.domain.com/, domain.com/, www.domain.com/index.html are all different pages even though the content may be exactly the same.

This issue is referred to as URL canonicalisation. The biggest problem is that it can divide your link juice between all the versions. If someone links to www1, then www and www2 aren't getting the link juice.

Ordinarily you'd redirect using a 301 permanent redirect to combine all versions into one, but by doing so you'd lose the load balancing as it's currently set up.

Is there any way to set up your servers to load balance off just www -- invisibly in the background? If not then you're always going to have this issue.