Re: [lustre-discuss] fio and lustre performance

No comment on the actual performance issue, but we normally test fio using the libaio interface (which is handled in the kernel) instead of posixaio (which is handled by threads in userspace, AFAIK), and also use DirectIO to avoid memory copies (OK if there are enough IO requests in flight). it

[lustre-discuss] fio and lustre performance

Hi all, I'm trying to figure out an odd behavior when running an fio ( https://git.kernel.dk/cgit/fio/ ) benchmark on a Lustre file system. fio--randrepeat=1 \ --ioengine=posixaio \ --buffered=1 \ --gtod_reduce=1 \ --name=test \ --fil