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+: A Brick is the GlusterFS basic unit of storage, represented by an
+ export directory on a server in the trusted storage pool. A Brick is
+ expressed by combining a server with an export directory in the
+ following format:
+ For example:
+ `myhostname:/exports/myexportdir/`
+: A cluster is a group of linked computers, working together closely
+ thus in many respects forming a single computer.
+Distributed File System
+: A file system that allows multiple clients to concurrently access
+ data over a computer network.
+: A method of storing and organizing computer files and their data.
+ Essentially, it organizes these files into a database for the
+ storage, organization, manipulation, and retrieval by the computer's
+ operating system.
+ Source: [Wikipedia][]
+: Filesystem in Userspace (FUSE) is a loadable kernel module for
+ Unix-like computer operating systems that lets non-privileged users
+ create their own file systems without editing kernel code. This is
+ achieved by running file system code in user space while the FUSE
+ module provides only a "bridge" to the actual kernel interfaces.
+ Source: [Wikipedia][1]
+: Geo-replication provides a continuous, asynchronous, and incremental
+ replication service from site to another over Local Area Networks
+ (LAN), Wide Area Network (WAN), and across the Internet.
+: The Gluster management daemon that needs to run on all servers in
+ the trusted storage pool.
+: Metadata is data providing information about one or more other
+ pieces of data.
+: Namespace is an abstract container or environment created to hold a
+ logical grouping of unique identifiers or symbols. Each Gluster
+ volume exposes a single namespace as a POSIX mount point that
+ contains every file in the cluster.
+Open Source
+: Open source describes practices in production and development that
+ promote access to the end product's source materials. Some consider
+ open source a philosophy, others consider it a pragmatic
+ methodology.
+ Before the term open source became widely adopted, developers and
+ producers used a variety of phrases to describe the concept; open
+ source gained hold with the rise of the Internet, and the attendant
+ need for massive retooling of the computing source code.
+ Opening the source code enabled a self-enhancing diversity of
+ production models, communication paths, and interactive communities.
+ Subsequently, a new, three-word phrase "open source software" was
+ born to describe the environment that the new copyright, licensing,
+ domain, and consumer issues created.
+ Source: [Wikipedia][2]
+: A petabyte (derived from the SI prefix peta- ) is a unit of
+ information equal to one quadrillion (short scale) bytes, or 1000
+ terabytes. The unit symbol for the petabyte is PB. The prefix peta-
+ (P) indicates a power of 1000:
+ 1 PB = 1,000,000,000,000,000 B = 10005 B = 1015 B.
+ The term "pebibyte" (PiB), using a binary prefix, is used for the
+ corresponding power of 1024.
+ Source: [Wikipedia][3]
+: Portable Operating System Interface (for Unix) is the name of a
+ family of related standards specified by the IEEE to define the
+ application programming interface (API), along with shell and
+ utilities interfaces for software compatible with variants of the
+ Unix operating system. Gluster exports a fully POSIX compliant file
+ system.
+: Redundant Array of Inexpensive Disks (RAID) is a technology that
+ provides increased storage reliability through redundancy, combining
+ multiple low-cost, less-reliable disk drives components into a
+ logical unit where all drives in the array are interdependent.
+: Round Robin Domain Name Service (RRDNS) is a method to distribute
+ load across application servers. RRDNS is implemented by creating
+ multiple A records with the same name and different IP addresses in
+ the zone file of a DNS server.
+Trusted Storage Pool
+: A storage pool is a trusted network of storage servers. When you
+ start the first server, the storage pool consists of that server
+ alone.
+: Applications running in user space don’t directly interact with
+ hardware, instead using the kernel to moderate access. Userspace
+ applications are generally more portable than applications in kernel
+ space. Gluster is a user space application.
+: Volfile is a configuration file used by glusterfs process. Volfile
+ will be usually located at `/var/lib/glusterd/vols/VOLNAME`.
+: A volume is a logical collection of bricks. Most of the gluster
+ management operations happen on the volume.
+ [Wikipedia]:
+ [1]:
+ [2]:
+ [3]: