The enterprise SAP HANA cloud utilizes extremely reliable hardware, and sophisticated architecture and monitoring designed to keep unplanned downtime as close to zero as possible. However, things can go wrong. For example, multiple pieces of hardware can fail at the same time, or something can happen to the data center itself. High availability (HA) systems are designed for businesses that can’t afford downtime, even under disaster scenarios. Here’s what you need to know about HANA high availability.
HANA High Availability Basics
To a large degree, high availability is built into SAP HANA. HANA appliances and compute nodes are built with redundant components and other hardware to minimize the chance of outage. Tier 3 data centers further reduce the risk of outage, through security, redundancy and bulletproof construction.
However, high availability on SAP HANA requires additional hardware, and proper configuration so that if the primary system does fail it can failover to a stand-by node as quickly as possible, without data loss and with minimal interruption. Full SAP HANA HA scenarios typically leverage native system replication augmented by a clustering package that provides elements such as heartbeat monitoring, and fencing.
Because system replication provides a complete clone of the primary database, the HANA HA system can leverage clustering and automation to failover immediately if there’s a disaster or failure. The cluster suite negates the need for human intervention, while system replication ensures the data integrity of the standby node.. The right partner can help you chose the SAP ERP solution that makes sense for your business.
How to Optimize SAP HANA HA
HANA high availability needs to provide a high level of performance configured to your company’s exact specifications. Traditionally, companies had to choose between disaster recovery, which used offsite replication, and high availability, with redundant onsite replication. DR was more resilient, since it could withstand failure of the primary site, but it was much slower to restart, and could have much higher RPO and RTO, leading to greater business disruption. HA provided instant failover, but could be damaged along with the primary site — for example by a flood.
Cloud disaster recovery and HA allows a great deal more flexibility to meet your availability and business continuity needs. Organizations often benefit from a combination of both in a three-tier configuration, using SAP HANA HA to eliminate downtime in the event of application, database, or application failure, and disaster recovery as a fall-back , ensuring that, even if a disaster somehow disrupts the primary hosting site, the company will be able to resume operations quickly.
HANA HA Testing
You may never need your HANA high availability system, but if you do, it needs to work perfectly the first time. Testing the component systems have value, but that method can miss things. If possible, your partner should execute an actual test failover during low demand, to make sure everything works properly. Disaster recovery testing can be more complex, since it requires you to anticipate and plan a range of potential risks. As a result, it may require the direct involvement of your team.
Symmetry Keeps Your System Working
Your SAP HANA landscape is the core of your business. Symmetry’s deep understanding of SAP HANA, and a commitment to optimal performance can free you from both unplanned downtime and performance degradations, ensuring it’s always supporting your business.
Contact us to learn more about how our SAP HANA high availability services can keep you up and running, no matter what life throws at your business.