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Re: Nginx writing to Cephfs

July 23, 2015 02:51PM
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

Thanks,
Vedran
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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