OmniMessaging Functional Description 8.3

OmniMessaging Functional Description
07/22/04 Opsol Integrators Inc. Confidential and Proprietary Page 12 of 68
originator. If delivery of the NDR fails then the message is forwarded to an
administrative mailbox and sends an alarm to the system console.
5.1.2 Scalable Email server
OmniMessaging provides scalability in the following ways:
• OmniMessaging components and processes can run in different
processors on the same physical node. In addition you can cluster
multiple nodes in a Multi node cluster to grow to a maximum of 4096
processors.
• OmniMessaging runs on a NonStop™ System, where one can easily
add disks, communication controllers, and processors as needed. One
can easily configure OmniMessaging components for additional traffic by
using OmniMessaging management applications and other standard
tools. All of this can be done online with no outage or impact to the
application. A small two cpu starter system for 100,000 subscribers can
grow to a large 4080 cpu system for millions of subscribers with zero
application outage.
5.1.3 Multi node growth
OmniMessaging in a multi node NonStop™ environment is designed to:
• Provide 24*7 service availability during planned and unplanned node
outages (constant application availability).
• Provide scalability – that is to handle subscriber growth with more
accounts and data flow beyond the limits of a single node system,
typically 1 million subscribers.
• To maintain a level of service even during hardware failures e.g. failures
on Network Transport, Database, CPU or even a complete node.
• To provide the capability to upgrade a single node (SYSGEN) with no
loss of service to the subscribers.
• To maintain service during an OmniMessaging upgrade into new MS
format.
• To migrate users successfully from one node to another for load
balancing across the entire system.
The above list highlights that the network external to the NonStop™ Himalayas
must not be Node dependent in that, in the event of a Node being unavailable
then another Node must be accessible via the IP network.