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Confused about CSV IO and performance counters in a scale out file server

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Hi all,

A quick question about CSV IO paths when using in a SOFS.

I've been reading through the following article about performance monitoring CSV volumes.  http://blogs.msdn.com/b/clustering/archive/2014/06/05/10531462.aspx

Looking at our performance counters under "Cluster CSV File System" when observing IO on the CSV volume it seems that all IO is going through the redirected route, instead of direct IO.

The following counters are always zero and should represent direct IO?

  • IO Reads/sec
  • IO Writes/sec

The following counters are showing the correct counters

  • Reads/sec
  • Writes/sec

Does this imply that all IO is going through redirected IO instead of direct IO?

Is this a symptom of running CSV on top of a clustered storage space?


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