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Jdd dhok |
at Feb 13, 2009 at 9:11 am
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Hi,
Linux kernel provides delay accounting information through a netlink
socket to user space. You can read more about it here:
http://www.mjmwired.net/kernel/Documentation/accounting/taskstats.txt.I think there's a python tool called iotop that uses this feature.
Hope this helps.
Regards,
Jaideep
On Fri, Feb 13, 2009 at 2:40 AM, Bryan Duxbury wrote:
Hey all,
Does anyone have any experience trying to measure IO time spent in their
map/reduce jobs? I know how to profile a sample of map and reduce tasks, but
that appears to exclude IO time. Just subtracting the total cpu time from
the total run time of a task seems like too coarse an approach.
-Bryan
--
- JDD
