Hi Cory, I am running this stuff now since a few weeks. Only a few users are using the file system up to now. Either I was lucky or Andreas is right. No one has complained yet that data got lost. I am running integrity checks in parallel and they did not find anything yet. So we can say it is "most probably safe" :)
Regards, Michael > Michael, > > Unfortunately, the current Lustre Ops Manual indicates the opposite. From > section 24.3 "Testing OST Performance (obdfilter_survey)": > > "The obdfilter_survey script is destructive and should not be run on > devices that containing existing data that needs to be preserved. Thus, > tests using obdfilter_survey should be run before the Lustre file system > is placed in production." > > I opened LUDOC-146 to track the issue previously and updated the details > to include Andreas' explanation. > > Thanks, > -Cory > > > On 3/21/13 7:18 PM, "Dilger, Andreas" <andreas.dil...@intel.com> wrote: > >> On 2013/21/03 4:09 AM, "Michael Kluge" <michael.kl...@tu-dresden.de> >> wrote: >>> I have read through the documentation for obdfilter-survey but could not >>> found any information on how invasive the test is. Will it destroy an >>> already formatted OST or render user data unusable? >> >> It shouldn't - the obdfilter-survey uses a different object sequence (2) >> compared to normal filesystem objects (currently always 0), so the two do >> not collide. >> >> Cheers, Andreas >> -- >> Andreas Dilger >> >> Lustre Software Architect >> Intel High Performance Data Division >> >> >> _______________________________________________ >> HPDD-discuss mailing list >> hpdd-disc...@lists.01.org >> https://lists.01.org/mailman/listinfo/hpdd-discuss > _______________________________________________ Lustre-discuss mailing list Lustre-discuss@lists.lustre.org http://lists.lustre.org/mailman/listinfo/lustre-discuss