doc: Update glusterfs introduction doc.

Change-Id: I4e9520bf46b7b9611c3719623a940b16b4cadda0
Signed-off-by: Humble Devassy Chirammal <hchiramm@redhat.com>
Reviewed-on: http://review.gluster.org/8870
Reviewed-by: Justin Clift <justin@gluster.org>
Reviewed-by: Lalatendu Mohanty <lmohanty@redhat.com>
Tested-by: Lalatendu Mohanty <lmohanty@redhat.com>

2 files changed, 63 insertions, 31 deletions

diff --git a/doc/admin-guide/en-US/markdown/gfs_introduction.md b/doc/admin-guide/en-US/markdown/gfs_introduction.md
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-Introducing Gluster File System
-===============================
-
-GlusterFS is an open source, clustered file system capable of scaling to
-several petabytes and handling thousands of clients. GlusterFS can be
-flexibly combined with commodity physical, virtual, and cloud resources
-to deliver highly available and performant enterprise storage at a
-fraction of the cost of traditional solutions.
-
-GlusterFS clusters together storage building blocks over Infiniband RDMA
-and/or TCP/IP interconnect, aggregating disk and memory resources and
-managing data in a single global namespace. GlusterFS is based on a
-stackable user space design, delivering exceptional performance for
-diverse workloads.
-
-![ Virtualized Cloud Environments ](../images/640px-GlusterFS_Architecture.png)
-
-GlusterFS is designed for today's high-performance, virtualized cloud
-environments. Unlike traditional data centers, cloud environments
-require multi-tenancy along with the ability to grow or shrink resources
-on demand. Enterprises can scale capacity, performance, and availability
-on demand, with no vendor lock-in, across on-premise, public cloud, and
-hybrid environments.
-
-GlusterFS is in production at thousands of enterprises spanning media,
-healthcare, government, education, web 2.0, and financial services. The
-following table lists the commercial offerings:
-
-* [Red Hat Storage](https://access.redhat.com/site/documentation/Red_Hat_Storage/)
-* Red Hat Storage Software Appliance
-* Red Hat Virtual Storage Appliance
diff --git a/doc/admin-guide/en-US/markdown/glusterfs_introduction.md b/doc/admin-guide/en-US/markdown/glusterfs_introduction.md
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+Introducing Gluster File System
+===============================
+
+GlusterFS is an open source, distributed file system capable of scaling to
+several petabytes and handling thousands of clients. It is a file system with
+a modular, stackable design, and a unique no-metadata server architecture.
+This no-metadata server architecture ensures better performance,
+linear scalability, and reliability. GlusterFS can be
+flexibly combined with commodity physical, virtual, and cloud resources
+to deliver highly available and performant enterprise storage at a
+fraction of the cost of traditional solutions.
+
+GlusterFS clusters together storage building blocks over Infiniband RDMA
+and/or TCP/IP interconnect, aggregating disk and memory resources and
+managing data in a single global namespace.
+
+GlusterFS aggregates various storage servers over network interconnects
+into one large parallel network file system. Based on a stackable user space
+design, it delivers exceptional performance for diverse workloads and is a key
+building block of GlusterFS.
+The POSIX compatible GlusterFS servers, use any ondisk file system which supports
+extended attributes (eg: ext4, XFS, etc) to format to store data on disks, can be
+accessed using industry-standard access protocols including Network File System (NFS)
+and Server Message Block (SMB).
+
+![ Virtualized Cloud Environments ](../images/640px-GlusterFS_Architecture.png)
+
+GlusterFS is designed for today's high-performance, virtualized cloud
+environments. Unlike traditional data centers, cloud environments
+require multi-tenancy along with the ability to grow or shrink resources
+on demand. Enterprises can scale capacity, performance, and availability
+on demand, with no vendor lock-in, across on-premise, public cloud, and
+hybrid environments.
+
+GlusterFS is in production at thousands of enterprises spanning media,
+healthcare, government, education, web 2.0, and financial services.
+
+## Commercial offerings and support ##
+
+Several companies offer support or consulting - http://www.gluster.org/consultants/.
+
+Red Hat Storage (http://www.redhat.com/en/technologies/storage/storage-server)
+is a commercial storage software product, based on GlusterFS.
+
+
+## About On-premise Installation ##
+
+GlusterFS for On-Premise allows physical storage to be utilized as a
+virtualized, scalable, and centrally managed pool of storage.
+
+GlusterFS can be installed on commodity servers resulting in a
+powerful, massively scalable, and highly available NAS environment.
+
+GlusterFS On-premise enables enterprises to treat physical storage as a
+virtualized, scalable, and centrally managed storage pool by using commodity
+storage hardware. It supports multi-tenancy by partitioning users or groups into
+logical volumes on shared storage. It enables users to eliminate, decrease, or
+manage their dependence on high-cost, monolithic and difficult-to-deploy storage arrays.
+You can add capacity in a matter of minutes across a wide variety of workloads without
+affecting performance. Storage can also be centrally managed across a variety of
+workloads, thus increasing storage efficiency.
+
+