I am interested in a utility or process for monitoring disk IO per file on CentOS.
On Win2008, the resmon utility allows this type of drilldown, but none of the Linux utilities I have found do this (iostat, iotop, dstat, nmon).
My interest in monitoring IO bottlenecks on database servers. With MSSQL, I have found it an informative diagnostic to know which files / filespaces are getting hit the hardest.
You mean something like
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