HPE Shadowbase Zero Downtime Migration (ZDM) Solutions

Eliminate Planned Downtime and Costly Outages

HPE Shadowbase ZDM software provides continuous availability, eliminates planned downtime (no downtime for the application during migration), and removes business risk from application upgrades.

Real-world Shadowbase Zero Downtime Migration Use Cases

Key Benefits

Provides continuous application services to all end users for complex migrations, upgrades, and conversions:

Migrates to New Hardware (Homogeneous or Heterogeneous)
  • Upgrades the operating system or database software
  • Converts from an older to a newer application version
Avoid the Risk of Classic Big-bang Conversions and Outage Windows
  • Fully verifies the new environment before deploying
  • Cuts over users either gradually or at all at once to a known-working environment
Additional Benefits
  • Capacity Expansion — expand with symmetric or asymmetric nodes
  • Load Balancing — redistribute users and partitions across the network
  • Disaster Tolerance and Data Locality — disperse nodes geographically
  • Migrations — in increments, or initially to an active/active(A/A) environment
  • Operations — risk-free failover/recovery testing, or run and maintain unattended sites

"To add the third node we simply entered it into the Shadowbase configuration tool and an optimized configuration file was generated and deployed to all three servers.

Within 10 minutes, we went from two nodes to three nodes, running Shadowbase in full active/active mode between each of them.

Once the migration was complete, we simply reran the configuration tool and in a few minutes were running in active/active mode on the two remaining nodes, and retired the old production server.

It was that easy, totally effortless."

Switch Your Data Replication Engine to HPE Shadowbase Solutions

Figure 1 illustrates how HPE Shadowbase software can achieve zero application downtime via a multi-node upgrade or a single-system upgrade. In both cases, the new (upgraded) database and the current database are kept synchronized by Shadowbase data replication, so that if an issue arises with the new system, it is easy to revert to the current system without incurring any downtime. This configuration also enables the stepwise migration of users from the current to the new system, enabling a controlled and safe incremental migration, as opposed to the risky, all-at-once big-bang approach. All possible migration steps are not represented by this figure; for more details, please refer to our white paper:

HPE Remote Database Facility (RDF) Migrations

IT teams with HPE RDF should plan to migrate to HPE Shadowbase Solutions. RDF was matured by HPE (October 2018), which means that for now the product is still supported; however, it will not be enhanced (no new additional functionality).

Figure 1 — HPE Shadowbase Zero Application Downtime

"Upgrading is a great time to test your company’s disaster recovery plan, which will not only set you up better for the future but also help you minimize any disruptions that may occur during the upgrade."