Hello, We encountered a problem with performance of writes on GPFS when the application uses direct io access. To simulate the issue it is enough to run fio with option direct=1. The performance drop is quite dramatic - 250 MiB/s vs. 2955 MiB/s. We've tried to instruct GPFS to ignore direct IO by using "disableDIO=yes". The directive didn't have any effect. Is there any possibility how to achieve that GPFS would ignore direct IO requests and use caching for everything?
-- S přáním pěkného dne / Best regards Mgr. Peter Hruška IT specialista M Computers s.r.o. Úlehlova 3100/10, 628 00 Brno-Líšeň (mapa<https://mapy.cz/s/gafufehufe>) T:+420 515 538 136 E: [email protected]<mailto:[email protected]> www.mcomputers.cz<http://www.mcomputers.cz/> www.lenovoshop.cz<http://www.lenovoshop.cz/> [cid:[email protected]]
_______________________________________________ gpfsug-discuss mailing list gpfsug-discuss at gpfsug.org http://gpfsug.org/mailman/listinfo/gpfsug-discuss_gpfsug.org
