Cisco Cisco Packet Data Gateway (PDG) Documentation Roadmaps
GTPP Storage Server Overview
Features of the GSS ▀
Cisco ASR 5000 Series Product Overview ▄
OL-22938-01
Support for failover and scalable services.
Capacity for modular growth.
Low entry price compared to traditional hardware fault-tolerant systems.
Reduce or eliminate system downtime because of software or hardware failure.
Ensure availability of data and applications to GSS user, regardless of the kind of failure that would normally
take down a single-server system.
Provide enhanced availability of the system by enabling you to perform maintenance without shutting down the
entire cluster.
Cluster Components
Following are the cluster components work with GSS to provide this functionality:
GSS Cluster Node
A GSS cluster node is a GSS server that runs both the GSS Application software and Cluster Agent software.
The Cluster Agent enables carrier to network two GSS nodes in a cluster. Every GSS node in the cluster is
aware when another GSS node joins or leaves the cluster. Also, every GSS node in the cluster is aware of the
resources that are running locally as well as the resources that are running on the other GSS cluster nodes.
The Cluster Agent enables carrier to network two GSS nodes in a cluster. Every GSS node in the cluster is
aware when another GSS node joins or leaves the cluster. Also, every GSS node in the cluster is aware of the
resources that are running locally as well as the resources that are running on the other GSS cluster nodes.
Each GSS cluster node is a stand-alone server that runs its own processes. These processes communicate with
one another to form what looks like (to a network client) a single system that cooperatively provides
applications, system resources, and data to GSS users.
one another to form what looks like (to a network client) a single system that cooperatively provides
applications, system resources, and data to GSS users.
Common Storage System
A common storage system is a Fiber Channel (FC) -based cluster storage with FC drives for the servers in the
cluster environment. It is interconnected with GSS cluster nodes with carrier class network connectivity to
provide high level redundant storage and backup support for CDRs. It serves as common storage for all
connected GSS cluster nodes.
cluster environment. It is interconnected with GSS cluster nodes with carrier class network connectivity to
provide high level redundant storage and backup support for CDRs. It serves as common storage for all
connected GSS cluster nodes.
This system provides high storage scalability and redundancy with RAID support.
Important:
For information on Switching CDRs from HDD to GSS and Switching CDRs from GSS to HDD
procedures, refer to the AAA Interface Administration and Reference Guide.
Multiple Instance GSS
This feature enables support for multiple data streams from one server or a single cluster setup to utilize multiple
instances of GSS with a single installation and multiple databases. In a cluster setup, there is only one installation per
node. During installation, GSS is installed at a fixed location (/opt/gss_global directory). The initial GSS installation
does not create any GSS instance. Once GSS is installed on both the nodes, the /opt/gss_global/make_gss_instance
script utility creates instances as an when needed and validates the conflicting ports/username across the instances.
instances of GSS with a single installation and multiple databases. In a cluster setup, there is only one installation per
node. During installation, GSS is installed at a fixed location (/opt/gss_global directory). The initial GSS installation
does not create any GSS instance. Once GSS is installed on both the nodes, the /opt/gss_global/make_gss_instance
script utility creates instances as an when needed and validates the conflicting ports/username across the instances.