a9s Parachute Concerns

Every a9s Data Service Service Instance has an a9s Parachute process running. This process will stop the node process when the persistent disk hits 80% of usage. This is valid for all services.

The persistent disk is mounted using ext4, this file system reserves a portion of the filesystem (5% by default) for the root user to prevent, among other things, normal users (vcap) from filling the disk and crashing the system.

The calculation for the used disk space does not consider the reserved disk space, and it is calculated over the overall disk usage.