Back cover An introduction to z/VM Single System Image (SSI) and Live Guest Relocation (LGR) ® ® Learn about the business benefits of SSI and LGR Understand important concepts and planning Step through IBM z/VM 6.2 introduces significant changes to z/VM in the form of multiple system clustering technology allowing up to four z/VM instances in a single system image (SSI) cluster. This technology is important, because it offers clients an attractive alternative to vertical growth by adding new z/VM systems. In the past, this capability required duplicate efforts to install, maintain, and manage each system. SSI reduces or eliminates these duplicate efforts. Support for live guest relocation (LGR) allows you to move Linux virtual servers without disruption to the business, helping you to avoid planned outages. The z/VM systems are aware of each other and can INTERNATIONAL TECHNICAL SUPPORT ORGANIZATION BUILDING TECHNICAL