著者: Matt Bernstein 日付: To: Michael Haardt CC: exim-dev 題目: Re: [exim-dev] Old topic again: Option to avoid fsync()?
At 15:21 +0100 Michael Haardt wrote:
> If you have a previously overloaded system that built up a large queue,
> disabling fsync() is like an overboost switch: Not for regular operation,
> but it solves the problem and brings you back to regular operation,
> allowing to care about the original problem.
I try to avoid r/w contention by using full data journalling with external
journals, which are on physically different (and hopefully faster) HDDs. I
believe this is good practice for synchronous I/O like mail and NFS.
For real psychopathic I-don't-care-about-my-data cases you can always use
tmpfs..