Big Data Computing

67Tassonomy and Review of Big Data Solutions Navigation

A good solution to optimize the reaction time and to obtain a scalable solu-

tion at limited costs is the adoption of a multitiered storage system, including

cache levels, where data pass from one level to another along the hierar-

chy of storage media having different response times and costs. In fact, a

multitier approach to storage, utilizing arrays of disks for all backup with

a primary storage and the adoption of an efcient le systems, allows us to

both provide backups and restores to online storage in a timely manner, as

well as to scale up the storage when primary storage grows. Obviously, each

specic solution does not have to implement all layers of the memory hier-

archy ...