Veritas Dynamic Multi-Pathing Administrator's Guide

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  • Article ID:000076627


Veritas™ Dynamic Multi-Pathing Administrator's Guide


1. Understanding DMP
About Veritas Dynamic Multi-Pathing
How DMP works
How DMP monitors I/O on paths
Load balancing
DMP coexistence with HP-UX native multi-pathing
DMP in a clustered environment
Multiple paths to disk arrays
Device discovery
Disk devices
Disk device naming in DMP
Operating system-based naming
About enclosure-based naming
2. Setting up DMP to manage native devices
About setting up DMP to manage native devices
Migrating LVM volume groups to DMP
Migrating to DMP from EMC PowerPath
Migrating to DMP from Hitachi Data Link Manager (HDLM)
Migrating to DMP from HP native multi-pathing
Using DMP devices with Oracle Automatic Storage Management (ASM)
Enabling DMP devices for use with ASM
Removing DMP devices from the listing of ASM disks
Migrating ASM disk groups on operating system devices to DMP devices
Adding DMP devices to an existing LVM volume group or creating a new LVM volume group
Displaying the native multi-pathing configuration
Removing DMP support for native devices
3. Administering DMP
About enabling and disabling I/O for controllers and storage processors
About displaying DMP database information
Displaying the paths to a disk
Setting customized names for DMP nodes
Administering DMP using vxdmpadm
Retrieving information about a DMP node
Displaying consolidated information about the DMP nodes
Displaying the members of a LUN group
Displaying paths controlled by a DMP node, controller, enclosure, or array port
Displaying information about controllers
Displaying information about enclosures
Displaying information about array ports
Displaying extended device attributes
Suppressing or including devices for VxVM or DMP control
Gathering and displaying I/O statistics
Setting the attributes of the paths to an enclosure
Displaying the redundancy level of a device or enclosure
Specifying the minimum number of active paths
Displaying the I/O policy
Specifying the I/O policy
Disabling I/O for paths, controllers or array ports
Enabling I/O for paths, controllers or array ports
Renaming an enclosure
Configuring the response to I/O failures
Configuring the I/O throttling mechanism
Configuring Subpaths Failover Groups (SFG)
Configuring Low Impact Path Probing
Displaying recovery option values
Configuring DMP path restoration policies
Stopping the DMP path restoration thread
Displaying the status of the DMP path restoration thread
Displaying information about the DMP error-handling thread
Configuring array policy modules
4. Administering disks
About disk management
Discovering and configuring newly added disk devices
Partial device discovery
Discovering disks and dynamically adding disk arrays
Third-party driver coexistence
How to administer the Device Discovery Layer
Changing the disk-naming scheme
Displaying the disk-naming scheme
Regenerating persistent device names
Changing device naming for TPD-controlled enclosures
Discovering the association between enclosure-based disk names and OS-based disk names
5. Online dynamic reconfiguration
About online dynamic reconfiguration
Reconfiguring a LUN online that is under DMP control
Removing LUNs dynamically from an existing target ID
Adding new LUNs dynamically to a new target ID
About detecting target ID reuse if the operating system device tree is not cleaned up
Scanning an operating system device tree after adding or removing LUNs
Cleaning up the operating system device tree after removing LUNs
Upgrading the array controller firmware online
Replacing a host bus adapter
6. Event monitoring
About the event source daemon (vxesd)
Fabric Monitoring and proactive error detection
Discovery of iSCSI and SAN Fibre Channel topology
About DMP event logging
Starting and stopping the event source daemon
7. Performance monitoring and tuning
DMP tunable parameters

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