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If you didn’t already know Google has many data centers that run their index at any given time. They use different data centers to show different results. Some one on the East coast might see different results than someone on the West coast. Even using the next button on Google might take you to a different data center. Google decides what data center provides what result at any given time. If someone is aware of the different Google data centers IP address’s then they can poll each data center separately.

With the upcoming Big Daddy update Google has said that they are targeting these types of algorithmic changes:

* Canonicalization - How the engine decides what url’s reside in the engine.

* 302 redirects - Some developers have tried to spam the engines by serving keyword rich pages.

* Duplicate Content - Would be the same information at different locations.

Google’s index is updated every day as Google crawls the web. There pretty much is always an update going on.

Google has algorithms and data pushes that are going out on a less frequent basis. The latest were on 27 June, 28 July and 17 August.

Google’s BigDaddy update was a software infrastructure upgrade that finished in February. The BigDaddy update introduced a new way how they crawl the web.

Matt Cutts mentions in the video that another software infrastructure update is on the way. The new update should increase the quality of the search results:

“If we find out that we can improve quality by changing our algorithms or data or infrastructure, or anything else, we’re going to make that change.

The best SEO’s in my experience are the ones that can adapt, and that say ‘OK, this is the way the algorithms look right now to me, if I want to make a good site that will do well in search engines, this is the direction I want to head in next.’”

It is not often that I link to other posts, but today I cannot seem to help myself.

Rand has written “An Exhaustive List of Search Engine Based Keyword Research Data“, and fairly exhaustive it is. I read quite a few blogs on a daily basis and there very few post that have me searching for the print icon, this is one of them.

Keyword research is a subject close to my heart at the moment. Yesterday, along with two colleagues, I gave a presentation called “How to make search engines love your site” to an audience of Chartered Institute of Marketing members. I believe just over 60 people attended, each having paid a reasonable, fee the pressure was on. No guessing what my main subject was… yep, keyword research. If only I had read Rand’s post first.

I have been toying with signing up for the SEOmoz premium content, this finally convinced me that I should and I am now approx $400 lighter, but the content and tools are more than worth it.