Setting customized names for DMP nodes

Setting customized names for DMP nodes

The DMP node name is the meta device name which represents the multiple paths to a disk. The DMP node name is generated from the device name according to the VxVM naming scheme.
See Disk device naming in VxVM.
You can specify a customized name for a DMP node. User-specified names are persistent even if names persistence is turned off.
To specify a custom name for a DMP node
  • Use the following command:
    # vxdmpadm setattr dmpnode dmpnodename name=name
You can also assign names from an input file. This enables you to customize the DMP nodes on the system with meaningful names.
To assign DMP nodes from a file
  1. Use the script vxgetdmpnames to get a sample file populated from the devices in your configuration. The sample file shows the format required and serves as a template to specify your customized names.
  2. To assign the names, use the following command: 
    # vxddladm assign names file=pathname

Comments

Post a Comment

Popular posts from this blog

BMCs and the IPMI Protocol

Image
Baseboard Management Controllers (BMCs) are a type of embedded computer used to provide out-of-band monitoring for desktops and servers. These products are sold under many brand names, including HP iLO, Dell DRAC, Sun ILOM, Fujitsu iRMC, IBM IMM, and Supermicro IPMI. BMCs are often implemented as embedded ARM systems, running Linux and connected directly to the southbridge of the host system's motherboard. Network access is obtained either via 'sideband' access to an existing network card or through a dedicated interface. In addition to being built-in to various motherboards, BMCs are also sold as pluggable modules and PCI cards. Nearly all servers and workstations ship with or support some form of BMC. The Intelligent Platform Management Interface (IPMI) is a collection of specifications that define communication protocols for talking both across a local bus as well as the network. This specification is managed by Intel and currently comes in two flavors, ve...
Read more

Logical Domains Reference Manual

Image
Name ldm– command-line interface for the Logical Domains Manager Synopsis ldm or ldm --help [ subcommand ] ldm -V ldm add-domain -i file ldm add-domain [mac-addr= num ] [hostid= num ] [failure-policy=ignore|panic|reset|stop] [master= master-ldom1 ,..., master-ldom4 ] ldom ldm add-domain ldom ... ldm set-domain -i file ldm set-domain [failure-policy=ignore|panic|reset|stop] [master=[ master-ldom1 ,..., master-ldom4 ]] ldom ldm remove-domain -a ldm remove-domain ldom ... ldm list-domain [-e] [-l] [-o format ] [-p] [ ldom ...] ldm migrate-domain [-n] source-ldom [ user @] target-host [: target-ldom ] ldm add-vcpu number ldom ldm set-vcpu number ldom ldm remove-vcpu number ldom ldm add-crypto number ldom ldm set-crypto number ldom ldm remove-crypto number ldom ldm add-memory size [ unit ] ldom ldm set-memory size [ unit ] ldom ldm remove-memory size [ unit ] ldom ldm cancel-operation (migration | reconf) ldom ldm add-io [bypass=on] bus ...
Read more

Understanding How ZFS Calculates Used Space

This document explains how ZFS calculates the amount of used space within a zpool and provides examples of how various ZFS features affect that calculation. DETAILS A ZFS storage pool is a logical collection of devices that provide space for datasets such as filesystems, snapshots and volumes. A zfs pool can be used as a filesystem, i.e. such as mounting/unmounting; to take snapshots that provides read-only (clones are writable copies of snapshots) copies of the filesystem taken in the past; to create volumes that can be accessed as a raw and a block device and for setting properties on datasets. Interaction of all these datasets and associated properties such as quotas, reservations, compression and deduplication (Solaris 11 only) play a role in how ZFS calculates space usage. Neither the du nor df command have been updated to account for ZFS file system space usage. When calculating zfs space usage, always use the following command. # zfs list -r -o space <pool_name...
Read more