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Re: Nginx writing to Cephfs

July 24, 2015 09:55AM
Valentin V. Bartenev Wrote:
-------------------------------------------------------
> On Thursday 23 July 2015 14:51:58 vedranf wrote:
> > Valentin V. Bartenev Wrote:
> >
> > > It more looks like a bug in cephfs. writev() should never return
> > > ERESTARTSYS.
> >
> >
> > I've talked to the ceph people, they say ERESTARTSYS shows up in
> strace
> > output but it is handled by the kernel and that writev(2) is
> interrupted by
> > the SIGALRM, which actually appears in the strace output just after
> writev
> > fails.
> >
> > I also failed to get this error by doing the same this as nginx
> using dd, dd
> > always succeeded so it happens due to combination of nginx and
> cephfs.
> >
> > Here's full strace output (2 examples from 2 differently configured
> > servers):
> >
> > http://pastebin.com/wUAAcdT7
> >
> > http://pastebin.com/wHyWc9U5
> >
>
> Do you have timer_resolution configured?

Yes, it's:

timer_resolution 50ms;
Subject Author Posted

Nginx writing to Cephfs

Vedran Fura─Ź July 23, 2015 08:42AM

Re: Nginx writing to Cephfs

Valentin V. Bartenev July 23, 2015 09:46AM

Re: Nginx writing to Cephfs

vedranf July 23, 2015 02:51PM

Re: Nginx writing to Cephfs

vedranf July 24, 2015 09:40AM

Re: Nginx writing to Cephfs

Valentin V. Bartenev July 24, 2015 09:42AM

Re: Nginx writing to Cephfs

vedranf July 24, 2015 09:55AM

Re: Nginx writing to Cephfs

Valentin V. Bartenev July 24, 2015 10:22AM

Re: Nginx writing to Cephfs

vedranf July 24, 2015 01:28PM



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