Nginx writing to Cephfs

[vedranf]

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;

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,260512,260543#msg-260543