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diff --git a/src/ceph/doc/glossary.rst b/src/ceph/doc/glossary.rst deleted file mode 100644 index 8254640..0000000 --- a/src/ceph/doc/glossary.rst +++ /dev/null @@ -1,187 +0,0 @@ -=============== - 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". - - OSD id - The integer that defines an OSD. It is generated by the monitors as part - of the creation of a new OSD. - - OSD fsid - This is a unique identifier used to further improve the uniqueness of an - OSD and it is found in the OSD path in a file called ``osd_fsid``. This - ``fsid`` term is used interchangeably with ``uuid`` - - OSD uuid - Just like the OSD fsid, this is the OSD unique identifer and is used - interchangeably with ``fsid`` - - bluestore - OSD BlueStore is a new back end for OSD daemons (kraken and newer - versions). Unlike :term:`filestore` it stores objects directly on the - Ceph block devices without any file system interface. - - filestore - A back end for OSD daemons, where a Journal is needed and files are - written to the filesystem. - - 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. - - systemd oneshot - A systemd ``type`` where a command is defined in ``ExecStart`` which will - exit upon completion (it is not intended to daemonize) - - LVM tags - Extensible metadata for LVM volumes and groups. It is used to store - Ceph-specific information about devices and its relationship with - OSDs. - -.. _http://github.com/ceph: http://github.com/ceph -.. _Cluster Map: ../architecture#cluster-map |