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Using the results from the Tulip log analysis script we can identify the hosts and their success percentages. We opted to disable all the hosts which were having success less than 20%, and to enable the ones with success rate greater than 20%. The above mentioned script is in /afs/slac.stanford.edu/package/pinger/tulip and it performs the listed functions. It uses the LWP package to access the webpage, downloads the analyzed tulip log file, saves it in a file and then parses the output to get: for option ability=1, the faulty (landmarks (i.e. the ones below 20% success rate by default) updating the database to disable such hosts; or toption option ability=0 the landmark landmarks with a success rate greater than 20% and re-enable enables them in the database. It (tulip-tuning.pl) is run twice nightly (see the trscrontab) once to disable non working landmarks, once to enable landmarks that are now working aianagain. The runs are before the sites.xml or sites-disabled.xml is are created and specify using the tulip log file analyzed for the last 3 days.