O'Reilly logo

Database Systems: Concepts, Design and Applications by S. K. Singh

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

21.7. Clustering-based Disaster-proof Databases

If downtime is not an option and the Web never closes for business, how do we keep our company’s doors open 24/7? The answer lies in high-availability (HA) systems that approach 100 per cent uptime.

The principles of high availability define a level of backup and recovery. Until recently, high availability simply meant hardware or software recovery via RAID (Redundant Array of Independent Disks). RAID addressed the need for fault tolerance in data but did not solve the problem of a complete DBMS.

For even more uptime, database administrators are turning to clustering as the best way to achieve high availability. Recent moves by Oracle, with its Real Application Cluster and Microsoft, with MCS (Microsoft ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required