title: Setting multiple Cronjob for updating DB
body: <p>Currently am working on Data extraction from <a href="http://en.wikipedia.org/wiki/Multiple_listing_service/" rel="nofollow">MLS</a> and inserting into DB(with LAMP). Once everything is inserted, I want to set a Cronjob for checking incremental updates in the MLS every 2 hrs.
  So in the near future I want to complete more than 500 MLS and thereby 500 Crons will be running at a time.</p>
  
  <p>Is there any challenge to setup more than 500 cron script written in PHP at a time?</p>
  
  <p>Is it possible with Shell script?</p>
  
  <p>Is there any alternative solution?</p>
  
  <p>Thanks</p>