Migrate to HPE NonStop for Higher Availability

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Figure 1 — Original Architecture


A large Japanese e-commerce company provides 24×7 shopping on a high-volume Java* cell phone application hosted by a four-node Oracle RAC in a Linux cluster (Figure 1). Oracle was used for the authorization system of a new digital money service with 300 tables.


  1. Scalability: An influx of new customers and their high volume of transactions created an Oracle RAC bottleneck. Users periodically experienced unacceptable wait times as a result.
  2. Availability: 90% of the end users experienced a system outage at least once per year.
  3. Recovery times: 25% of the end users experienced an outage lasting 10 hours or more. In some cases, the outage lasted more than 24 hours.

More Backstory

  1. The company performed several proof-of-concepts (POCs). The previously used alternatives posed significant migration challenges.
  2. The company approached Hewlett Packard Enterprise (HPE) for alternatives.
  3. HPE introduced the NonStop X NS7 using the SQL/MX database.
  4. The company performed an extensive POC: Java app requirements tested on the NS7 with SQL/MX, proving the NonStop could satisfy the customer’s scalability, availability, and recovery time requirements.
  5. The company decided to switch the application and database to the NonStop solution.
  6. The company needed a zero downtime migration (ZDM) approach.
    1. Since e-commerce is 24×7, the company’s end users could not experience an outage.
    2. There were no resources remaining on the Oracle RAC cluster to run additional processes.
    3. The customer demanded a safe, tested, and risk-free cut-over sequence, proving the solution was “known-working” before the actual cut-over occurred.

HPE decided to use HPE Shadowbase software to satisfy the ZDM requirements, and enlisted Gravic to assist.


In the original architecture, the provider used a custom tool to perform monthly batch backups from the production to the Cold DR system.

To Facilitate the Migration

A. It started capturing the production database changes with HPE Shadowbase software to an interim staging database.

B. It performed its normal monthly backup from the old production environment to the Cold DR site.

C. It used Ispirer for the initial load of the data from the Cold DR site to the new production environment.

D. It then started HPE Shadowbase replication of the change data from the staging database to the new production environment.

E. For subsequent synchronization of the data between the systems, the customer relied on HPE Shadowbase Log Source for Oracle to continue to read the Oracle logs from the old production environment to push the database change data to the staging database server. It then replayed the changes from there to the new production environment.

F. During the project, HPE Shadowbase software was installed on the old production environment (to capture the database changes), the intermediate Linux staging database server (to store and forward the database changes), and the new NonStop production environment (to apply the database changes into the new production database).

Note: When it came time to redeploy the payments application on NonStop X, HPE worked with the customer to convert all SQL statements using SQLWays from Ispirer – a company that specializes in providing tools to better facilitate database migrations converting database schema (DDL), data and server-side business logic from Oracle.

According to HPE, “After completing the data replication, the customer migrated the online application from old Oracle systems to new NonStop SQL in 15 minutes.”


Final Architecture

Figure 2 — Final Architecture

HPE Shadowbase Products of Interest

Contact us or your HPE Shadowbase representative, and learn how Shadowbase software will benefit you.

Further Reading

Related White Paper: Zero Downtime Migrations Using HPE Shadowbase Software to Eliminate Planned Downtime via Zero Downtime Migration

Related Solution Brief: Zero Downtime Migrations HPE Shadowbase Zero Downtime Migration

*Java is a registered trademark of Oracle and its affiliates