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GT.M - Multi Site Replication Support on UNIX

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Overview

GT.M V5.1-000 provides the capability to deploy an application in a logical multi-site configuration with multiple secondary sites to a single primary site.

Prior versions of GT.M featured the capability to deploy an application in a logical dual-site configuration with only one secondary site.

A configuration having a primary and secondary in proximity for operational efficiency, however, would not provide protection against a disruption that affects both systems. A separate and distant “disaster recovery” (DR) third system can provide the operational convenience of proximal systems for routine operations, and a distant system for continuity of business in the face of catastrophic events. Prior GT.M versions did not make it possible to set up multiple secondary and/or tertiary systems. GT.M V5.1-000 enables such multi-site configurations. For migration to the new version with continuity of business, a dual-site configuration where one site runs on a GT.M version that has multi-site replication enabled and the other site runs on a GT.M version that does not, is supported.

[Note]
The terms site and instance are used interchangeably throughout this technical bulletin to refer to a primary or secondary system that participates in replication. Please also note that GT.M imposes no restrictions on the number of instances that can reside on a given machine.
[Note]
A configuration that uses GT.M replication between one primary and one secondary is henceforth termed a dual-site configuration while a configuration that uses GT.M replication between one primary and more than one secondary and/or tertiaries is henceforth termed a multi-site configuration. Likewise, replication between one primary and one secondary is termed dual-site replication. Replication between one primary and more than one secondary and/or tertiaries is termed multi-site replication.