Zero Downtime Migration (ZDM) and Platform Refresh for Island Bank

Copy link to clipboard
Email link
Print

Figure 1 — Island Bank’s Original Architecture

Situation

An island bank uses a legacy replication product in an active/passive business continuity architecture for its BASE24™ application environment on HPE NonStop Servers (Figure 1).

The bank purchased new platform hardware, new BASE24 software, and wants to implement an HPE Shadowbase Sizzling-Hot-Takeover (SZT) business continuity architecture.

Problem

The bank needed to migrate to its new platform, application version, and HPE Shadowbase SZT architecture.
The bank needed to avoid an application outage, and required a proven, safe, and reliable migration method.

Solution

Use HPE Shadowbase Zero Downtime Migration (ZDM) to upgrade the BASE24 application, perform the hardware platform refresh, and replace the legacy replication engine (Figure 2), successfully migrating to an HPE Shadowbase SZT architecture (Figure 3).

Original Architecture

Step 1: Create and Test New Environment

Step 2: Load & Synchronize New Environment

Step 3: Compare New Backup Database with Old

Step 4: Disconnect Users, Let Replication Queues Drain, then Connect Users to New Environment

Retire Old Systems, Final Architecture

Figure 2 — Island Bank’s New HPE Shadowbase Sizzling-Hot-Takeover Architecture

Outcomes

Acquires a new method and best practices for performing a migration
Upgrades the BASE24 application and performs the
hardware platform refresh with minimal downtime
Switches replication engines during the migration

HPE Shadowbase Products of Interest

HPE NonStop Shadowbase Basic Replication Software (BE441AC/QSA49V6)
HPE NonStop Shadowbase Advanced Replication LTU (BE442AL/QSA50V6)
HPE NonStop Shadowbase Compare Software (BE445AC/QSA53V6)