OpenStack Storage (Cinder & Swift) Flashcards

Which OpenStack service provides shared filesystem storage (NFS/CIFS) as a service?

Answer: Manila

Manila is the OpenStack Shared File System service that provides shared filesystems over NFS, CIFS, and other protocols.

What is Swift's default number of replicas for object durability?

Answer: 3

Swift defaults to 3 replicas of each object to ensure data durability across multiple storage nodes.

What is the purpose of the Cinder 'transfer' feature?

Answer: Transferring ownership of a volume from one project to another

Cinder volume transfer allows a volume to be transferred from one OpenStack project/tenant to another.

In OpenStack, what does 'ephemeral storage' refer to?

Answer: Temporary disk storage tied to a VM instance's lifecycle that is lost when the instance is deleted

Ephemeral storage is the temporary local disk attached to a VM instance that is destroyed when the instance is terminated.

Which command creates a new Cinder volume of 10GB named 'mydata'?

Answer: openstack volume create --size 10 mydata

The unified OpenStack CLI uses 'openstack volume create --size ' to create a new Cinder volume.

What is the purpose of Swift's 'container' in the storage hierarchy?

Answer: A logical namespace for grouping objects, similar to a bucket in S3

A Swift container is a namespace for storing objects, analogous to a bucket in Amazon S3 or a directory.