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## 1 

## Introduction to high availability and disaster recovery 

This chapter describes high availability (HA) and disaster recovery (DR), including technologies that are used with clusters to restart the servers. In addition, this chapter introduces the IBM VM Recovery Manager for HA and DR. 

The following topics are described in this chapter: 

GLYPH<SM590000> General high availability and disaster recovery overview 

GLYPH<SM590000> Restart technologies and clustering methods 

GLYPH<SM590000> VM Recovery Manager HA 

GLYPH<SM590000> IBM VM Recovery Manager DR 

