Abstract: Example techniques for granting permissions for performing an operation related to a backup copy are described. The backup copy corresponds to first device data and the first device data is stored in a first device. In an example, in response to receiving a request to perform the operation related to the backup copy, telemetry data received from the first device is analyzed. Based on the analysis, it is determined that security of the first device is uncompromised. Based on the determination, a permission to perform the operation related to the backup copy is granted.

Abstract: Example implementations relate to backups to a secondary storage system of a file system instance that hierarchically relates data objects by content-based signatures to a root object and includes subtrees that correspond to respective inodes. In an example, a list of the content-based signatures is sent to the secondary storage system. Metadata and data of a subtree is stored into an item in the secondary storage system designated for the subtree.

Abstract: Some examples relate to prefetching data in a distributed storage system. In an example, a first storage node may receive I/O requests sent by a host system, for sequential data of a storage volume distributed across a plurality of storage nodes. The first storage node may determine whether the host system is aware or unaware of layout information of the storage volume. If the host system is unware, the first storage node may prefetch the sequential data of the storage volume from other nodes of the plurality of storage nodes. If the host system is aware, the first storage node may indicate to a second storage node that the I/O requests by the host system are for the sequential data of the storage volume.