Nginx writing to Cephfs

vedranf nginx-forum at
Thu Jul 23 18:51:58 UTC 2015

Valentin V. Bartenev Wrote:

> It more looks like a bug in cephfs.  writev() should never return

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

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


Posted at Nginx Forum:,260512,260527#msg-260527

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