Veritas Dynamic Multi-Pathing Administrator's Guide

  • Modified Date:
  • Article ID:000003303


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
Dynamic Reconfiguration
DMP in a clustered environment
Multiple paths to disk arrays
Device discovery
Disk devices
Disk device naming in DMP
About 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 ZFS pools to DMP
Migrating to DMP from EMC PowerPath
Migrating to DMP from Hitachi Data Link Manager (HDLM)
Migrating to DMP from Sun Multipath IO (MPxIO)
Using Dynamic Multi-Pathing (DMP) devices with Oracle Automatic Storage Management (ASM)
Enabling Dynamic Multi-Pathing (DMP) devices for use with Oracle Automatic Storage Management (ASM)
Removing Dynamic Multi-Pathing (DMP) devices from the listing of Oracle Automatic Storage Management (ASM) disks
Migrating Oracle Automatic Storage Management (ASM) disk groups on operating system devices to Dynamic Multi-Pathing (DMP) devices
Adding DMP devices to an existing ZFS pool or creating a new ZFS pool
Displaying the DMP configuration for native ZFS support
Removing DMP support for native devices
3. Administering DMP
About enabling and disabling I/O for controllers and storage processors
About displaying Veritas Dynamic Multi-Pathing (DMP) information
Displaying the paths to a disk
Setting customized names for DMP nodes
DMP coexistence with native multi-pathing
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 DMP path information for devices under third-party driver control
Displaying extended device attributes
Suppressing or including devices from VxVM control
Gathering and displaying DMP I/O statistics
Setting the attributes of the paths to an enclosure
Displaying the path redundancy level of a device or enclosure under DMP control
Specifying the minimum number of active paths for a device or enclosure under DMP control
Displaying the DMP I/O policy
Specifying the DMP 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 DMP's response to I/O failures
Configuring the DMP I/O throttling mechanism
Configuring DMP's Subpaths Failover Groups (SFG)
Configuring DMP's 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
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
VxVM coexistence with ZFS
Changing the disk device naming scheme
Displaying the disk-naming scheme
Regenerating persistent device names
Changing device naming for TPD-controlled enclosures
Simple or nopriv disks with enclosure-based naming
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 on an M5000 server managed by DMP
6. Event monitoring
About the Dynamic Multi-Pathing (DMP) event source daemon (vxesd)
Fabric Monitoring and proactive error detection
Dynamic Multi-Pathing (DMP) automated device discovery on Solaris
Dynamic Multi-Pathing (DMP) discovery of iSCSI and SAN Fibre Channel topology
DMP event logging
Starting and stopping the Dynamic Multi-Pathing (DMP) event source daemon
7. Performance monitoring and tuning
About tuning Veritas Dynamic Multi-Pathing (DMP) with templates
DMP tuning templates
Example DMP tuning template
Tuning a DMP host with a configuration attribute template
Managing the DMP configuration files
Resetting the DMP tunable parameters and attributes to the default values
DMP tunable parameters and attributes that are supported for templates
DMP tunable parameters

Terms of use for this information are found in Legal Notices.



Did this article answer your question or resolve your issue?


Did this article save you the trouble of contacting technical support?


How can we make this article more helpful?

Email Address (Optional)