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Strange things have been happening at Google. From pages that for a while seem to not exist in the index, to results showing up with old titles. Google isn’t the Google we used to know anymore. It seems like Google has retired the old trusty search engine and moved on to a completely new engine.

It seems to be much more than an update of the old engine. It seems like the old engine has been replaced by a new engine. I am even willing to go as far as to speculate that the last couple of weeks Google has been moving all pages from the old index to the new index.

The strange results where a title is shown that is not actually in the cached version of the page may be an indication of Google monitoring historical data on titles. This is definitely something they weren’t doing before. Also the pages that seem to be falling out of the index only to re-appear some time later may be an indication that new types of records are being created in order to record all the historical data.

So the old Google search engine seems to be retiring, and a new Google search engine is emerging. Though the florida update of November 2003 could simply be the implementation of (parts of) the new historical data algorithm, the last 3 to 6 weeks many things have been happening at Google.

Based on the traffic of some sites and the speed with which many sites seem to come out of the “sand box”, I speculate that Google is doing weekly updates. These weekly updates may be as simple as once a week (generally during the weekend) updating one group of factors, (like average age, PR, anchor texts, etc). Suppose there are like 10 to 15 groups of factors, you would expect a cycle of 10 to 15 weeks.

So is the old Google search engine retiring? Difficult to say, but most certainly, Google isn’t anymore what it used to be. It seems to have made a leap forward in search technology, finally doing some real information retrieval rather than just data retrieval, though it still is focused mostly on the latter.