The gateway is the descendant of today’s networked storage arrays and provides block and file access to data in the cloud. That could be stored as blocks, files or objects. These arrays get hollowed out, their hot data going to server flash, the nearline data staying while the older data goes off to the cloud, leaving only a storage hub controller and limited nearline data capacity.
The cloud provides the scalability needed and, with copy management software like Actifio’s the storage efficiency needed. The gateway dedupes and compresses all traffic going to the cloud, and strongly encrypts it as well, keeping the NSA busybodies at bay.