update ceph source to reef 18.2.1

[ceph.git] / ceph / doc / glossary.rst

diff --git a/ceph/doc/glossary.rst b/ceph/doc/glossary.rst
index ed04de697c43b94cd0f4f8ff81aa221a28f7337d..4d70376849d5adef142310a4c0c991b1288a89ad 100644 (file)
--- a/ceph/doc/glossary.rst
+++ b/ceph/doc/glossary.rst
@@ -15,10 +15,12 @@
                 introduced in the Ceph Kraken release. The Luminous release of
                 Ceph promoted BlueStore to the default OSD back end,
                 supplanting FileStore. As of the Reef release, FileStore is no
-                longer available as a storage backend.
+                longer available as a storage back end.
                 
-                BlueStore stores objects directly on Ceph block devices without
-                a mounted file system.  
+                BlueStore stores objects directly on raw block devices or
+                partitions, and does not interact with mounted file systems.
+                BlueStore uses RocksDB's key/value database to map object names
+                to block locations on disk.
 
         Bucket
                 In the context of :term:`RGW`, a bucket is a group of objects.
@@ -269,7 +271,7 @@
                 The Ceph manager software, which collects all the state from
                 the whole cluster in one place.
 
-       MON
+       :ref:`MON<arch_monitor>`
                The Ceph monitor software.
 
        Node
@@ -328,6 +330,19 @@
        Pools
                 See :term:`pool`.
 
+       :ref:`Primary Affinity <rados_ops_primary_affinity>`
+                The characteristic of an OSD that governs the likelihood that
+                a given OSD will be selected as the primary OSD (or "lead
+                OSD") in an acting set. Primary affinity was introduced in
+                Firefly (v. 0.80). See :ref:`Primary Affinity
+                <rados_ops_primary_affinity>`.
+
+        Quorum 
+                Quorum is the state that exists when a majority of the
+                :ref:`Monitors<arch_monitor>` in the cluster are ``up``. A
+                minimum of three :ref:`Monitors<arch_monitor>` must exist in
+                the cluster in order for Quorum to be possible.
+
        RADOS
                 **R**\eliable **A**\utonomic **D**\istributed **O**\bject
                 **S**\tore. RADOS is the object store that provides a scalable