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Google's everflux and fresh crawl
Google updates its entire database of Web sites about once
a month. This process of updating the database is called the
"Google Dance" because the newly indexed Web pages
appear first at www2.google.com, then they'll be transferred
to www3.google.com until they finally appear in the main index
at www.google.com.
The Google Dance usually lasts only a couple of days near
the end of each month. This month, the Google Dance was a
little late when it started on March, 6th.
When you read this newsletter, the Google Dance should be
over and Google should have a new and updated index. Check
out if your rankings have changed in the new index:
http://www.Google.com
The monthly update is only one of two separate update processes
at Google. Since June 2002, Google changes rankings all through
the month. The ongoing change became known as "everflux".
Google introduced a "fresh crawl" process to make
their results as relevant and as fresh as possible. It runs
each day. The purpose of the daily fresh crawl is to update
Web pages in the index that change regularly. This allows
Google to provide results that are up-to-date with current
events.
The fresh crawl not only adds modified pages but also new
pages. However, those pages stay in the Google search results
for only a few days. Only after the next major update you
can tell if those pages will stay for a longer time in the
index.
So when you see your Web site appear in the Google search
results and then you check some days later and your site has
disappeared, don't panic. In this case, your site has been
found and indexed by the fresh crawler. Be patient, your site
will be listed at the end of this month or at the end of the
following month. More
about the Google Dance.
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