Failure Domain Topology

Every Parallels Cloud Storage service component has topology information assigned to it. Topology paths define a logical tree of components' physical locations consisting of 5 identifiers: room.row.rack.host_ID.cs_ID .

The first 3 topology path components, room.row.rack , can be configured in the /etc/pstorage/location configuration files (for more information, see the man page for pstorage-config-files ). The last 2 components, host_ID.cs_ID , are generated automatically:

• host_ID is a unique, randomly generated host identifier created during installation and located at /etc/pstorage/host_id .
• cs_ID is a unique service identifier generated at CS creation.

Note: To view the current services topology and disk space available per location, run the pstorage top command and press w .