On Tue, 2010-03-02 at 15:45 -0500, Ms. Megan Larko wrote: > Hi, Hi,
> I logged directly into the OSS (OSS4) and just ran a df (along with a > periodic check of the log files). I last looked about two weeks ago > (I know it was after 17 Feb). Is the implication that at this point the OSTs were more or less well balanced? > Anyway, the OST0007 is more full than > any of the other OSTs. The default lustre stripe (I believe that is > set to 1) is used. Can just one file shift the size used of one OST > that significantly? Sure. As an example, if one had a 1KiB file on that OST, called, let's say, "1K_file.dat" and one did: $ dd if=/dev/zero of=1K_file.dat bs=1G count=1024 that would overwrite the 1KiB file on that OST with a 1TiB file. Recognizing of course that that would be 1TiB in a single object on an OST. > What other reasonable explanation for a > difference on one OST in comparison with the others? Any kind of variation on the above. > Could this cause > a lustre performance hit at this point? Not really. b.
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