Cloud-Integrated Storage (CIS) is a conventional storage network based on a Storage Area Network (SAN), as Network Attached Storage (NAS) or as a Unified Storage System
. Such a storage network is integrated into the cloud storage and works like a conventional storage network that stores data
and forms part of the cloud storage. Conceptually, corresponding storage networks with their local and cloud-based storage are managed on site, whereby data that changes quickly and must be accessed frequently is temporarily stored in the local storage. In contrast, data that does not need to be accessed as frequently is stored in the cloud storage.