This goes to dan, but will interest anyone else trying to use iometer on
linux (i.e. running 'dynamo' on linux).
on some linux distributions (e.g. on centos), the 'rt' library has an
implementatoin of aio_read/aio_write that simulates AIO using
synchronous I/O - instead of using the real AIO interface on linux.
on centos 5.X - you need to link with '-lrtkaio' instead of '-lrt' when
compiling the 'dynamo' part of iometer.
in order to know if your dynamo is using AIO or not - you need to run
it, cause it to perform I/O, find its process id, and then
run 'strace -eio_submit -p <process id>' and look at the output.
if you get no output - the process is not using AIO. if you get output
- it is using AIO.
dan - if you could make this strace test on your fedora system and let
me know the results - that'll be great. i want to find a clear way to
find the real library that should be linked to - and then send a patch
to the iometer developers (who all seem to be too much windows-oriented).
thanks,
--guy
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