July 2004
Intermediate to advanced
496 pages
16h 46m
English
book
IBM TotalStorage Enterprise Storage Server Implementing ESS Copy Services with IBM eServer zSeries
by Cathy Warrick, Paul Jenkin, Claus Schiefer, Jiri Spacek
Content preview from IBM TotalStorage Enterprise Storage Server Implementing ESS Copy Services with IBM eServer zSeries
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Chapter 1. Introduction 7
I/O load balancing
For selected open system servers, the ESS in conjunction with the Subsystem Device Driver
(SDD), a pseudo device driver designed to support multi-path configurations, provides
dynamic load balancing. Dynamic load balancing helps eliminate data-flow bottlenecks by
distributing the I/O workload over multiple active paths, thus contributing to improved I/O
throughput and response time of the open system server.
2 Gb Fibre Channel/FICON host adapters
As the amount of data and transactions grow, so does the traffic over the Storage Area
Networks (SAN). As SANs migrate to 2 Gb technologies to cope with this increased amount
of data transit, so does the IBM TotalStorage Enterprise Storage Server Model 8
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