mirror of https://github.com/ceph/ceph
157 lines
4.3 KiB
ReStructuredText
157 lines
4.3 KiB
ReStructuredText
===============
|
|
Ceph Glossary
|
|
===============
|
|
|
|
Ceph is growing rapidly. As firms deploy Ceph, the technical terms such as
|
|
"RADOS", "RBD," "RGW" and so forth require corresponding marketing terms
|
|
that explain what each component does. The terms in this glossary are
|
|
intended to complement the existing technical terminology.
|
|
|
|
Sometimes more than one term applies to a definition. Generally, the first
|
|
term reflects a term consistent with Ceph's marketing, and secondary terms
|
|
reflect either technical terms or legacy ways of referring to Ceph systems.
|
|
|
|
|
|
.. glossary::
|
|
|
|
Ceph Project
|
|
The aggregate term for the people, software, mission and infrastructure
|
|
of Ceph.
|
|
|
|
cephx
|
|
The Ceph authentication protocol. Cephx operates like Kerberos, but it
|
|
has no single point of failure.
|
|
|
|
Ceph
|
|
Ceph Platform
|
|
All Ceph software, which includes any piece of code hosted at
|
|
`http://github.com/ceph`_.
|
|
|
|
Ceph System
|
|
Ceph Stack
|
|
A collection of two or more components of Ceph.
|
|
|
|
Ceph Node
|
|
Node
|
|
Host
|
|
Any single machine or server in a Ceph System.
|
|
|
|
Ceph Storage Cluster
|
|
Ceph Object Store
|
|
RADOS
|
|
RADOS Cluster
|
|
Reliable Autonomic Distributed Object Store
|
|
The core set of storage software which stores the user's data (MON+OSD).
|
|
|
|
Ceph Cluster Map
|
|
cluster map
|
|
The set of maps comprising the monitor map, OSD map, PG map, MDS map and
|
|
CRUSH map. See `Cluster Map`_ for details.
|
|
|
|
Ceph Object Storage
|
|
The object storage "product", service or capabilities, which consists
|
|
essentially of a Ceph Storage Cluster and a Ceph Object Gateway.
|
|
|
|
Ceph Object Gateway
|
|
RADOS Gateway
|
|
RGW
|
|
The S3/Swift gateway component of Ceph.
|
|
|
|
Ceph Block Device
|
|
RBD
|
|
The block storage component of Ceph.
|
|
|
|
Ceph Block Storage
|
|
The block storage "product," service or capabilities when used in
|
|
conjunction with ``librbd``, a hypervisor such as QEMU or Xen, and a
|
|
hypervisor abstraction layer such as ``libvirt``.
|
|
|
|
Ceph Filesystem
|
|
CephFS
|
|
Ceph FS
|
|
The POSIX filesystem components of Ceph.
|
|
|
|
Cloud Platforms
|
|
Cloud Stacks
|
|
Third party cloud provisioning platforms such as OpenStack, CloudStack,
|
|
OpenNebula, ProxMox, etc.
|
|
|
|
Object Storage Device
|
|
OSD
|
|
A physical or logical storage unit (*e.g.*, LUN).
|
|
Sometimes, Ceph users use the
|
|
term "OSD" to refer to :term:`Ceph OSD Daemon`, though the
|
|
proper term is "Ceph OSD".
|
|
|
|
Ceph OSD Daemon
|
|
Ceph OSD Daemons
|
|
Ceph OSD
|
|
The Ceph OSD software, which interacts with a logical
|
|
disk (:term:`OSD`). Sometimes, Ceph users use the
|
|
term "OSD" to refer to "Ceph OSD Daemon", though the
|
|
proper term is "Ceph OSD".
|
|
|
|
Ceph Monitor
|
|
MON
|
|
The Ceph monitor software.
|
|
|
|
Ceph Manager
|
|
MGR
|
|
The Ceph manager software, which collects all the state from the whole
|
|
cluster in one place.
|
|
|
|
Ceph Metadata Server
|
|
MDS
|
|
The Ceph metadata software.
|
|
|
|
Ceph Clients
|
|
Ceph Client
|
|
The collection of Ceph components which can access a Ceph Storage
|
|
Cluster. These include the Ceph Object Gateway, the Ceph Block Device,
|
|
the Ceph Filesystem, and their corresponding libraries, kernel modules,
|
|
and FUSEs.
|
|
|
|
Ceph Kernel Modules
|
|
The collection of kernel modules which can be used to interact with the
|
|
Ceph System (e.g,. ``ceph.ko``, ``rbd.ko``).
|
|
|
|
Ceph Client Libraries
|
|
The collection of libraries that can be used to interact with components
|
|
of the Ceph System.
|
|
|
|
Ceph Release
|
|
Any distinct numbered version of Ceph.
|
|
|
|
Ceph Point Release
|
|
Any ad-hoc release that includes only bug or security fixes.
|
|
|
|
Ceph Interim Release
|
|
Versions of Ceph that have not yet been put through quality assurance
|
|
testing, but may contain new features.
|
|
|
|
Ceph Release Candidate
|
|
A major version of Ceph that has undergone initial quality assurance
|
|
testing and is ready for beta testers.
|
|
|
|
Ceph Stable Release
|
|
A major version of Ceph where all features from the preceding interim
|
|
releases have been put through quality assurance testing successfully.
|
|
|
|
Ceph Test Framework
|
|
Teuthology
|
|
The collection of software that performs scripted tests on Ceph.
|
|
|
|
CRUSH
|
|
Controlled Replication Under Scalable Hashing. It is the algorithm
|
|
Ceph uses to compute object storage locations.
|
|
|
|
ruleset
|
|
A set of CRUSH data placement rules that applies to a particular pool(s).
|
|
|
|
Pool
|
|
Pools
|
|
Pools are logical partitions for storing objects.
|
|
|
|
.. _http://github.com/ceph: http://github.com/ceph
|
|
.. _Cluster Map: ../architecture#cluster-map
|