Shared-nothing Vs. Single Point of Failure
The failure of disk hardware can create a single point of failure that can result in data loss. To avoid this problem, a shared nothing architecture can be employed. Each storage node communicates changes to other nodes or to a master, for replication purposes. If a single disk fails, other copies can be used to reconstruct or replace it on the fly so "nothing" is lost. To enable this feature, clients must be unaware of the physical location of a file. A single global file system is presented to clients, so the file system itself deals with allocations and low-level failures. Examples of this type of file system are found in products such as Ceph, Lustre, Isilon, IBRIX Fusion, and Hadoop.
Read more about this topic: Clustered File System
Famous quotes containing the words single, point and/or failure:
“Will power is only the tensile strength of one’s own disposition. One cannot increase it by a single ounce.”
—Cesare Pavese (1908–1950)
“I look upon it as a Point of Morality, to be obliged by those who endeavour to oblige me.”
—Richard Steele (1672–1729)
“All war represents a failure of diplomacy.”
—Tony Benn (b. 1925)