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Belgian-based retailer controls mainframe costs with advanced subsystem optimization


reduction in CICS MSUs


costs lowered


transaction volumes managed

Video: Colruyt Ensures Mainframe Optimization with BMC Solutions (1:53)

To stay competitive, Colruyt turned to BMC to ensure its mainframe performs in the most efficient way possible.

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Business Challenge

The European retail market is characterized by intense competition and narrow margins. Belgian-based Colruyt Group continues to excel in this challenging market by delivering high-quality products at low prices in the shops belonging to the group. Colruyt Group’s steady growth is driving increased demand on the company’s mainframe, which runs core applications such as store replenishment and pricing management. IT must accommodate continuous growth without increasing costs by exploring new ways to keep costs in check.

BMC Solution

Colruyt Group’s IT identified IBM monthly license charge (MLC) mainframe costs as an area for possible cost reduction. Utilizing Subsystem Optimizer for zEnterprise®, IT was able to move IBM CICS® subsystems onto LPARs that are separate from the IBM Db2® databases that they serve—lowering the peak 4-hour rolling average on logical partitions (LPARs) and significantly reducing MLC costs.

Business Impact

Subsystem Optimizer for zEnterprise enables IT to control Db2 usage and properly control mainframe costs, supporting Colruyt Group’s goal of growing the business while keeping prices low for their customers.

  • Separating CICS and Db2 yielded an 11% reduction in million service units (MSUs) on the CICS LPARs, significantly reducing monthly CICS charges.
  • Separating Db2 from CICS keeps costs steady despite rising transaction volumes.
  • Deployment of other BMC mainframe MLC cost management solutions will provide additional visibility, forecasting, modeling, and control over MLC costs.

“By working as effectively as possible, with the main purpose of keeping costs as low as possible, we can keep our promise of offering customers the lowest price for every product, all the time. BMC helps us keep this commitment by driving efficiency in our IT environment.”

— Peter Vanbellingen, Director of Business Processes and Systems, Colruyt Group

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