title: mounted moodledata directory to s3 but when we purge cache it throws an error
body: <p>I mounted my Moodle data directory to S3 bucket using fuse and S3fs on two EC2 instances. Now i am using both EC2 instances in a load balancer group, every thing is working fine till i am not purging cache. Once i purge cache of my application it throws me an error.</p>
  
  <blockquote>
    <p>Coding error detected, it must be fixed by a programmer: Failed to unserialise data from file. Either failed to read, or failed to write.</p>
  </blockquote>
  
  <p>Please suggest how we can share Moodledata directory for two or more than two instance.</p>