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| About storage visibility using Dynamic Multi-Pathing (DMP) in the hypervisor | ||
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| Prev | Improving storage visibility, availability, and I/O performance using Dynamic Multi-Pathing | Next |
Symantec Dynamic Multi-Pathing (DMP) for VMware in the hypervisor provides visibility to the storage in the VMware environment. DMP provides an user interface that is integrated into the vCenter, so that you can easily access information about the storage attributes, extended attributes, and types of storage in the environment. DMP also provides a command line interface.
When you install DMP in the hypervisor, DMP provides access to storage attributes such as the Array Volume Identifiers (AVID) for LUNs. You have immediate visibility into the active I/O policy, the number of paths, and the number of active/enabled paths. You can view real-time storage performance statistics directly within the vSphere Client. The datacenter view of DMP enables you to determine which storage arrays are attached to which ESX servers.
The device names are the same for DMP in the host and DMP in the guest (when using physical RDM). This feature allows easy end-to-end correlation from the guest to the ESXi host to the storage array, which reduces the chances of mis-configurations.
DMP enables the discovery of extended attributes from supported storage arrays. Some of these attributes include:
RAID levels
Device media types (SSD, SATA)
Array-based snapshots
Storage pool thin provision and reclamation capabilities
Array-based replication
With the information visible from DMP, you can provision and manage the storage effectively for applications. DMP helps you to perform the following tasks:
Provision storage with defined performance characteristics.
Locate applications on storage with proper attributes, service levels and other characteristics.
Identify storage bottlenecks and provide diagnostic information to resolve issues with application performance.
Migrate virtual machines between LUNs to achieve better performance or service levels using vMotion.
To achieve storage visibility using DMP, install DMP for VMware in the hypervisor.
See the Symantec Dynamic Multi-Pathing Installation Guide - VMware ESX.