Solr Disk and Memory Size Estimator (Excel worksheet)

If you do a standard checkout of the Lucene/Solr codebbase you also get a dev-tools directory.  One interesting tidbit in there is an Excel spreadsheet for estimating the RAM and disk requirements for a given set of data.  Be sure to notice the tabs along the bottom, tab 2 is for memory/RAM estimates, and tab 3 is for disk space.

Full URL: http://svn.apache.org/repos/asf/lucene/dev/trunk/dev-tools/size-estimator-lucene-solr.xls