White papers
To achieve high availability and prepare for disaster recovery, a customer's data must be written simultaneously to local and remote site disks. To be written to the remote disks, data must travel across kilometers of fibers. How much time should that take? How is the performance of the production system impacted? How far can you put the remote system to fit to your performance goals? We did a study with two kinds of mirroring: Peer-to-Peer Remote Copy (PPRC) and IBM AIX mirroring. Multiple tests with real fibers allowed us to understand how it works.
In this paper, we show you how to implement the procedures for the recovery of an architecture solution after a disaster, including a multi-partitioned IBM eServer iSeries system and IBM TotalStorage with Metro Mirror. The procedure explains how to recover the needed information from the remote IBM Enterprise Storage Server (ESS) so that the different partitions can be rebuilt on a new system installed at the backup site, in case a disaster occurs at the production site. It also explains how to recover the data from the backup ESS on the existing production system in case the production ESS fails.
TDBFG is widely recognized as the best of breed for having achieved continuous availability since 1996 of its Parallel Sysplex and the core bank services it supports. The purpose of this Continuous Availability Best Practices paper is to provide a real-life case study that proves reaching such a milestone is possible, and to bring well-deserved credit to TDBFG as a worldwide leader in IT Service Management. Considering that each IT environment is unique, the TDBFG story should be as an example of what is possible, rather than as a specific roadmap for any one other organization.
This paper combines the efforts and talents of the IBM System z™ New Technology Center, the eServer™ High Availability Center of Competence, and Linux® on System z Integration Test to produce a set of reference architectures that provide High Availability for applications running on Linux for System z.