Veritas InfoScale™ 7.4.1 Virtualization Guide - AIX
- Section I. Overview
- Storage Foundation and High Availability Solutions in AIX PowerVM virtual environments
- Section II. Implementation
- Setting up Storage Foundation and High Availability Solutions in AIX PowerVM virtual environments
- Supported configurations for Virtual I/O servers (VIOS) on AIX
- Installing and configuring Storage Foundation and High Availability (SFHA) Solutions in the logical partition (LPAR)
- Installing and configuring Cluster Server for logical partition and application availability
- Supported configurations for Virtual I/O servers (VIOS) on AIX
- Setting up Storage Foundation and High Availability Solutions in AIX PowerVM virtual environments
- Section III. Use cases for AIX PowerVM virtual environments
- Application to spindle visibility
- Simplified storage management in VIOS
- Configuring Dynamic Multi-Pathing (DMP) on Virtual I/O server
- Configuring Dynamic Multi-Pathing (DMP) pseudo devices as virtual SCSI devices
- Extended attributes in VIO client for a virtual SCSI disk
- Virtual machine (logical partition) availability
- Simplified management and high availability for IBM Workload Partitions
- Implementing Storage Foundation support for WPARs
- How Cluster Server (VCS) works with Workload Patitions (WPARs)
- Configuring VCS in WPARs
- High availability and live migration
- Limitations and unsupported LPAR features
- Multi-tier business service support
- Server consolidation
- About IBM Virtual Ethernet
- Using Storage Foundation in the logical partition (LPAR) with virtual SCSI devices
- How DMP handles I/O for vSCSI devices
- Physical to virtual migration (P2V)
- Section IV. Reference
About Dynamic Multi-Pathing in a Virtual I/O server
The Virtual I/O (VIO) server virtualization technology from IBM is a logical partition (LPAR) that runs a trimmed-down version of the AIX operating system. Virtual I/O servers have APV support, which allows sharing of physical I/O resources between virtual I/O clients.
Figure: Dynamic Multi-Pathing in the Virtual I/O serve illustrates DMP enablement in the Virtual I/O server.
DMP is fully functional in the Virtual I/O server. DMP administration and management commands (vxdmpadm, vxddladm, vxdisk) must be invoked from the non-restricted root shell.
$ oem_setup_env
Some example commands:
dmpvios1$ vxdmpadm getsubpaths dmpnodename=ibm_ds8x000_0337
NAME STATE[A] PATH-TYPE[M] CTLR-NAME ENCLR-TYPE ENCLR-NAME ATTRS ==================================================================== hdisk21 ENABLED(A) - fscsi0 IBM_DS8x00 ibm_ds8x000 - hdisk61 ENABLED(A) - fscsi0 IBM_DS8x00 ibm_ds8x000 - hdisk80 ENABLED(A) - fscsi1 IBM_DS8x00 ibm_ds8x000 - hdisk99 ENABLED(A) - fscsi1 IBM_DS8x00 ibm_ds8x000 -
dmpvios1$ vxdmpadm listenclosure all
ENCLR_NAME ENCLR_TYPE ENCLR_SNO STATUS ARRAY_TYPE LUN_COUNT FIRMWARE ======================================================================== disk Disk DISKS CONNECTED Disk 1 - ibm_ds8x000 IBM_DS8x00 75MA641 CONNECTED A/A 6 -
See the PowerVM wiki for more in-depth information about VIO server and virtualization:
http://www.ibm.com/developerworks/wikis/display/virtualization/VIO
For more information, see the PowerVM Virtualization on IBM System p redbook:
http://www.redbooks.ibm.com/redpieces/abstracts/sg247940.html