title: Flyway concurrent migration
body: <p>We are having many projects running on many servers looking up into one database, we"re thinking to setup Flyway to every project for control our database structure.</p>
  
  <p>But we are worrying about concurrent migration problem, if some projects re-deploy in sametime.( Off-coures, we always take care the "If exist" things in sql syntax ) </p>
  
  <p>How Flyway work when concurrent change on same data table or other struture things ?</p>