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is powerpath intelligent?
I read the powerpath load balancing and recovery whitepaper in EMC powerlink.
It talks how SAN is a dynamic environment with multiple servers getting zoned to the same front end disk array ports over a period of time..and how powerpath helps in intelligent/optimized path management.
A host with multiple HBA's is usually zoned to multiple front end ports on the disk array right?
So.. what this means is if a host is zoned to a front end disk array port that is overloaded.. then the multipath software on the host will intelligently send the I/O to a different path / front end disk array port to optimize the I/O...
So.. what this means is powerpath is intelligent.. and knows when a front end disk array port is overloaded right?
Can powerpath share these intelligent details with the unix system administrator?
Are there any powerpath monitoring commands that i can use to pull these performance stats from the unix host?
Please suggest or point me in the right direction.
thanks,
jespinoza1
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Posted January 2nd, 2013 06:00
Hi. There are new CLI commands in PowerPath that can help with I/O patterns and aid in diagnosing I/O problems. They are called Path Management Insight (PMI). Three new CLI commands (powermt set perfmon, powermt display perf, and powermt display perf bus) provide this information. On PowerLink you’ll find the release notes for the various OS’s PowerPath supports. The PMI commands are currently available for:
- PowerPath/VE for VMware
- PowerPath for Linux
- PowerPath for Solaris
- PowerPath for HP
Note: PowerPath for Windows will support PMI in the next release due out at the end of January
christopher_ime
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Posted January 29th, 2013 20:00
gshekar wrote:
Are there any powerpath monitoring commands that i can use to pull these performance stats from the unix host?
Please suggest or point me in the right direction.
thanks,
In addition to what was already mentioned, if your environment supports the latest v5.8 PowerPath/VE, we've introduced a new rpowermt namespace:
rpowermt display perf ...
Advanced metrics include:
1) Reporting throughput breakdown by blocksize
2) R/W IOPs broken down also by blocksize
3) Latency distribution
and more... I only recently deployed the latest version and the client (and I) were amazed by the details now readily available.
christopher_ime
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Posted January 29th, 2013 20:00
Ooops... responding about PowerPath/VE but you are running Unix. Ignore.
This forum is PowerPath/VE after all. Please ignore.
dynamox
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Posted December 31st, 2012 13:00
powermt display dev=all every=5