Skip to main content

How volumes are designed

How persistent storage volumes work in CGC: namespace limits, storage classes (access mode and disk type) and replication.

Main concepts​

Volume limits are set per namespace, they are not the same for everyone:

  • the number of volumes you can create is limited per namespace
  • the total storage space is limited per namespace

Check your own limits with cgc status. If you find those limits too restricting you should contact us at support@comtegra.pl

Access modes​

The access mode of a volume comes from its storage class, so which modes are available depends on the cluster. Run cgc volume details <storage_class> to see the access mode a given class provides.

Replication​

All volumes are replicated so your data is secure. If you need extra protection you can use external backup provided by Comtegra Backup Cloud.

Disk types​

The disk type behind a volume is also defined by its storage class and depends on the cluster. Run cgc status to list the storage classes available in your namespace (rows Storage (<class>)) and cgc volume details <storage_class> to see the details of a given class.