REHOSTING

COBOL Mainframe Rehosting

Our COBOL Rehosting solution combines the industry’s best software platforms with proven application consolidation and data migration services to ensure your entire mainframe estate is deployed to the target environment in the languages and database models you need.

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Why modernise?

CHALLENGES

Exorbitant costs

Mainframes running COBOL cost as much as 4,500 percent more to operate than equivalent Cloud counterparts. This figure is compounded by the rising licensing and maintenance fees for ancillary mainframe applications and databases. 

Limited flexibility

Companies are rapidly moving to modern environments and practices such as DevOps and the Cloud. However, the mainframe and its ancillary systems were not designed for modern IT agility, resulting in difficult integrations and limited flexibility.

 

Limited data accessibility

Legacy databases are difficult to integrate with systems on modern platforms. This is because of inherent inextensibility, incompatibility, and rigidity of the underlying hardware and software powering these legacy systems.

COBOL Rehosting

OUR SOLUTION

You can retain your COBOL as-is while taking advantage of the cost savings and infinite elasticity of the Cloud by rehosting your legacy estate with Advanced.

Rehosting, sometimes referred to as replatforming, is ideal for companies whose applications are still meeting their business needs, and who therefore wish to retain their COBOL development skills while moving away from non-relational databases and expensive mainframe infrastructure. With rehosting, COBOL is migrated onto modern, distributed platforms, either on-premises or in the Cloud, without change. Underlying legacy databases are migrated to relational models, configured to seamlessly interact with your applications via the rehosting platform.

Our COBOL Rehosting solution leverages three key service activities to account for the application source code, data and supporting operational infrastructure:

Application migration

During an assessment, our tools and modernisation experts catalogue the applications running in the mainframe estate, documenting dependencies and all application languages used. We also highlight dead and unused code that can be eliminated in the modernisation process to reduce the complexity and footprint of your source code. Core languages such as COBOL, PL/I, and JCL are retained and rehosted into the target environment of your choice. Leveraging our Automated Refactoring solutions, we consolidate other application languages into a single optimised language. For example, languages such as CA Telon or Natural which can be intermingled with COBOL on the mainframe can be consolidated to COBOL. This eliminates licensing fees and simplifies maintenance of your application on the rehosting platform.

Data migration

Our Automated Data Migration solution is leveraged to ensure existing legacy data files and databases are deployed in the desired model and optimised for the rehosting environment. Many data types such as VSAM, sequential, GDGs, IMS-DB, and certain relational databases can be retained in the rehosted environment. However, in some cases, a non-relational database is migrated to a relational model. For example, if your mainframe environment contains Adabas or IDMS databases, we would migrate them to SQL Server, Db2, Oracle, or PostgreSQL, depending on the rehosting platform, your preferences, and the nature of your applications.

Platform deployment

Deployment specifics depend on the rehosting platform and migrated estate, but this activity includes target environment sizing and architecture, identification of ancillary components (such as supporting third party solutions and utilities) that require replacement, deployment of the rehosting platform software, consolidated source code, utilities, and migrated databases, as well as testing and post-delivery support.

Learn more

Over 35 years of COBOL and mainframe modernisation experience

More than 500 successful modernisation projects completed

Over 2.5 billion lines of code refactored through automation

Intelligent modernisation, unparalleled experience

OUR PROCESS

Additional insights to help you modernise

RESOURCES

  • COBOL and the Cloud: What you should know

    By joining this webinar you will learn about how COBOL modernisation delivers a modern application stack to enable you to maximise the value of your Cloud investment.

    Watch on demand
    an image associated withCOBOL and the Cloud: What you should know Webinar
  • Department for Work and Pensions

    Our rehosting project with the Department of Work and Pensions (DWP) has been announced as this year’s winner of the Civil Service Project Delivery Excellence Award.

    Read case study
    an image associated withDepartment for Work and Pensions Case Study
  • Don’t kick the COBOL can down a crumbling road

    Whitepaper Read whitepaper
  • The New York Times

    Case Study Read case study
  • Rehosting mainframe applications

    Webinar Watch on demand
  • 2021 Mainframe Modernisation Report

    Report Read report

News & Opinions

BLOG // 05-10-2021

Three truths and a lie: Key things to know when moving your legacy envi…

by Simon Mikellides, Application Modernisation Practice Specialist

Three truths and a lie: Key things to know when moving your legacy environment to the cloud

IMS Conversion: A Technical Snapshot

This blog explores our IMS Data Migration solution, and the process we take towards moving legacy data on or off the mainframe.

by Rob Anderson, Vice President of Marketing and Product for Application Modernization

BLOG // 07-09-2021
IMS Conversion: A Technical Snapshot