Hitachi Dynamic Link Manager Software Users Guide for Linux

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.
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Devices Managed by HDLM
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System Configuration
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LU Configuration
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Program Configuration
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Position of the HDLM Driver and HDLM Device
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Logical Device Files for HDLM Devices
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Distributing a Load Using Load Balancing
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Performing Failovers and Failbacks Using Path Switching
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Monitoring Intermittent Errors (Functionality When Automatic Failback Is
Used)
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Detecting Errors by Using Path Health Checking
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Distributing a Load by Using the Dynamic I/O Path Control Function
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Error Management
HDLM Functions
2-1
Hitachi Dynamic Link Manager (for Linux®) User Guide