[Lustre-discuss] O_DIRECT

Michael Kluge Michael.Kluge at tu-dresden.de
Sat Aug 14 00:32:09 PDT 2010


Hi all,

how does Lustre handle write() requests to files opened with O_DIRECT. 
Does the OSS enforce that the OST has physically written the data to the 
OST before the op is completed or does the write() call return on the 
client before this? I do not see the whole file content walking through 
the FC port of the RAID controller, but it can also be that my 
measurement is wrong ...


Michael


-- 
Michael Kluge, M.Sc.

Technische Universität Dresden
Center for Information Services and
High Performance Computing (ZIH)
D-01062 Dresden
Germany

Contact:
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