Since mid-August 2015, new JCS instances do no longer have ephemeral (non-persistent) boot disk !
The documentation has been updated :
The Boot/OS volume of any service instance provisioned after the mid-August 2015 update to Oracle Java Cloud Service is persistent. Content added to a persistent Boot/OS volume is retained if the service instance is restarted.
The documentation has been updated :
The Boot/OS volume of any service instance provisioned after the mid-August 2015 update to Oracle Java Cloud Service is persistent. Content added to a persistent Boot/OS volume is retained if the service instance is restarted.