Changes

Since anyone can mount global persistent volumes in the same namespace, they can and should be used to share datasets. The name of a PVC which contains a useful dataset should start with "dataset-" and be descriptive, so that it can easily be found by other users. Also, the root of the PVC should contain a README with informations about the dataset (at least the source and what exactly it is). Finally A note on mounting. Currently (will change in the near future), ceph volumes can be either mounted ReadWrite by a single pod only, or ReadOnly by multiple pods. Thus, it the workflow for a static dataset is probably good practice if other users of to create the dataset which are not PVC, then create a pod to write all the creator data to it, then delete this pod and mount the volume readonly it read only from now on (by specifying "readOnly: true" after the mountPath using ReadOnlyMany as access mode) so it can be used in the pod's yaml)multiple pods.