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2
HDLM Functions
This chapter describes the various functions that are built into HDLM. Before
the function specifications are explained though, this chapter will go into
detail about the HDLM management targets, system configuration, and basic
terms that are necessary to know to effectively operate HDLM. After that, the
rest of the chapter focus on describing all the HDLM functions, including the
main ones: load distribution across paths and path switching.
Devices Managed by HDLM
System Configuration
LU Configuration
Program Configuration
Position of the HDLM Driver and hdisk
Distributing a Load Using Load Balancing
Performing Failovers and Failbacks Using Path Switching
Monitoring intermittent errors (functionality when automatic failback is
used)
Detecting errors by using path health checking
Distributing a Load by Using the Dynamic I/O Path Control Function
Error management
Collecting Audit Log Data
HDLM Functions
2-1
Hitachi Dynamic Link Manager User Guide for AIX
®
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