SAP High Availability
What Is High Availability?
High availability (HA) is the ability of a system to operate continuously without failing for a designated period of time. HA ensures a system meets an agreed-upon operational performance level. Availability is expressed as a percentage:
- 99% = 87.6 hours of annual downtime
- 9% = 8.76 hours of annual downtime
- 99% = 52 minutes of annual downtime
- 999% = 5 minutes of annual downtime.
High availability usually equals 99.999% or better. HA is achieved by eliminating single points of failure and providing the ability to rapidly resume operations after a system outage with minimal business loss.
What Is SAP High Availability?
SAP has put in place plans and procedures that enable SAP ERP and other critical systems to keep on running. A high-availability solution for SAP needs to achieve four core goals:
- Minimize downtime
- Eliminate data loss
- Maintain data integrity
- Enable flexible configuration.
For example, SAP offers the Standalone Enqueue Server 2 (ENSA2) as a component of Application Server ABAP to provide high availability. It supports two-node and multi-node clusters, which enables switchover to ENSA2 to ensure continued system availability. In addition, SAP High Availability Failover enables SAP Adaptive Server Enterprise (SAP ASE) to work in a cluster of servers in a specific configuration, enabling failover and failback on servers.
Further Resources for SAPinsiders
SAP High Availability Best Practices in AWS. In this webinar, Brett Barwick, Senior Software Engineer of SIOS Technology Corp., and Tamara Astakhov, Senior Partner, Solution Architect for Big Data & Analytics, AWS, discuss best practices for SAP high availability and how to achieve near-zero downtime.
The 15 Most Overlooked Items in Planning for High Availability and Disaster Recovery. In this article, Kurt Bishop, a retired member of SAP America’s Technical Consulting Team, offers advice on how to avoid costly mistakes by sharing the 15 most overlooked items — including the cost of downtime, security issues, loss of personnel and systems, and the importance of testing — and discussing how to incorporate them into recovery planning.
Architecting a High Availability SAP NetWeaver Infrastructure: Strategies for Ensuring a Successful, Cost-Effective Implementation. In this article, Matt Kangas, U.S. Product Manager for SAP NetWeaver Application Server at SAP Labs, provides an overview of HA basics and then discusses the technical details of an HA setup with SAP NetWeaver, including topics such as architectural single points of failure and ways to isolate and protect such failure points.
Vendors that can assist SAP customers with high availability include: AWS, Google Cloud, Microsoft, Managecore, Red Hat, Saberpoint, SIOS, SUSE, Virtustream, and Zebra Technologies.
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Accurate Order Promising through Global ATP in a Consolidation Environment
Learn how to implement rules-based available-to-promise (ATP) in a consolidation scenario including the use of multi-level ATP. Key Concept Fixed pegging is the process of establishing the relationship of a receipt document to the requirement document it fulfills. This linkage is not broken when receipts or requirements are rescheduled in time or through a planning...…
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Take Control of Order Confirmations with Backorder Processing in APO
Find out how the sort profile and filter type affect backorder processing (BOP). In this example based on a real-world scenario, see how the author developed a workaround that allowed the company to use the material availability date as a sort criterion for BOP. Key Concept Backorder processing (BOP) is a critical step in sales...…
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How Rights Inventory Management Works in SAP IPM
See how an SAP system handles the media industry’s need to manage intellectual property and to avoid the conflicts that can arise when an intangible product is licensed in multiple ways. Key Concept SAP Intellectual Property Management (SAP IPM) is part of the industry-specific offering SAP for Media. It sits on top of SAP CRM....…
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Make Promises You Can Keep with GATP
As product portfolios grow and customer lists expand, your ability to make and keep critical delivery commitments may be getting tenuous. SAP APO’s Global Available to Promise (GATP) technology offers the tools you need to take the guesswork out of the delivery planning process. Its flexibility makes GATP applicable to many industries. Key Concept Global...…
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Introduce Budget Availability Control into Cost Center Accounting
Learn how you can configure budget availability control for your Cost Centers with simple customizing steps. Key Concept Budget availability control in the managerial accounting (CO) and Project System (PS) modules is a standard SAP functionality that automates budget control through warnings and error messages. It also can send notification emails automatically to respective budget...…
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AWS Network Load Balancer Gains SAP ASE HADR Certification: Expanding High Availability Beyond NetWeaver
AWS has certified its Network Load Balancer for SAP ASE High Availability Disaster Recovery, enabling automated failover and traffic routing for diverse applications and improving operational efficiency while reducing downtime and risks in SAP environments.
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Meeting Demand with a Constrained Supply Using Product Allocation in SAP APO Global ATP
Learn the process flow of how product allocation can be used in SAP Advanced Planning and Optimization (SAP APO) Global available-to-promise (Global ATP) to meet customer requirements by managing the supply of scarce products. The system can perform availability checks in conjunction with product allocation checks. Key Concept Availability checks, also known as available-to-promise (ATP),...…
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Integration Aspects of Global Available-To-Promise: The Integration of SAP SCM and SAP ECC Necessary to Implement Global ATP
Learn about the key integration points between SAP Supply Chain Management (SCM) and SAP ERP Central Component (SAP ECC) required to effectively implement Global Available-To-Promise (Global ATP). Understand the configuration and master data elements that can influence this integration and learn about the potential impact of Global ATP on the order fulfillment processes. Key Concept...…
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Use Global ATP to Trigger Time-Based Location Substitution in a Consolidation Environment
Learn how to implement time-based location substitution using rules-based Available-to-Promise (ATP) in a consolidation scenario. An example from the chemical industry demonstrates how to set this up. Key Concept Inclusive rule strategies are used to determine the domain of products and the location substitutions that are possible based on the rules defined within the inclusive...…
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Understanding Your SAP System Architecture Before Migrating to the Cloud
Before migrating your existing SAP systems to the cloud—an initiative that many businesses are undertaking to remain relevant and redefine their IT landscape—it’s important that SAP customers understand their system architecture. Knowing where the connection points are between different pieces of architecture, where you’re putting them from an infrastructure perspective, and what sort of information…
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