doc/architecture.rst: improve rados definition

Improve the definition of RADOS, and link to information about RADOS.

Signed-off-by: Zac Dover <zac.dover@proton.me>
(cherry picked from commit 763f6b7a22e846962f388d58fd7e699cbf16ffe7)

diff --git a/doc/architecture.rst b/doc/architecture.rst
index c896316be7ecd062f134a8e95c3b74383209abcf..c210b4563026770707c8bcead7223f839e65e8b4 100644 (file)
--- a/doc/architecture.rst
+++ b/doc/architecture.rst
@@ -19,9 +19,14 @@ The Ceph Storage Cluster
 ========================
 
 Ceph provides an infinitely scalable :term:`Ceph Storage Cluster` based upon
-:abbr:`RADOS (Reliable Autonomic Distributed Object Store)`, which you can read
-about in `RADOS - A Scalable, Reliable Storage Service for Petabyte-scale
-Storage Clusters`_.
+:abbr:`RADOS (Reliable Autonomic Distributed Object Store)`, a reliable,
+distributed storage service that uses the intelligence in each of its nodes to
+secure the data it stores and to provide that data to client. See Sage Weil's
+"`The RADOS Object Store
+<https://ceph.io/en/news/blog/2009/the-rados-distributed-object-store/>`_" blog
+post for a brief explanation of RADOS and see `RADOS - A Scalable, Reliable
+Storage Service for Petabyte-scale Storage Clusters`_ for an exhaustive
+explanation of :term:`RADOS`.
 
 A Ceph Storage Cluster consists of multiple types of daemons: