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PowerPath compared to DMP

Created: 05 Jul 2013 • Updated: 31 Jul 2013 | 1 comment
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Is anyone aware of a good comparison of PowerPath and DMP, preferably something written recently? A few years ago (VxVM 5.0?) Symantec claimed almost-as-good path fault detection as PowerPath, and just-as-good load balancing. A more recent comparison would be great.

Best Regards, Alistair.

Operating Systems:

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Douglas Snyder's picture

Hello Alistair,

I am not aware of any new comparison documents. This is basically because there is little difference in performance between the two products. Both support multiple load balance policies, have good throughput, etc. However VERITAS DMP has several other advantages over PowerPath:

Centralized web management via VERITAS Operation Manager (VOM)

Application to spindle mapping and visibility

Web based performance metrics and troubleshooting with VOM

Thin storage reclaim support when used with the VERITAS file system and volume manager

Disk performance boost by ensuring cylinder partitions are correct (DMP provides visibility into the disk geometry - VxVM then creates the volume with the correct offset)

"Bad path" detection that will remove a congested or failed path instead of blindly sending data down a faulty path

There are more features in DMP but these are the major differences. Generally speaking DMP is somewhat less expensive than PowerPath. DMP is included in all Storage Foundation, Cluster File System, and SF HA packages. You can also buy DMP stand-alone or a VMware specific DMP package.

Doug Snyder, CISSP

Doug Snyder

Technical Architect 5

Columbus, Ohio USA