[dm-devel] Re: Temporarily squelching multipathd errors

[Christophe Varoqui <christophe varoqui free fr>]

> Greetings,
>  
> I perform SAN-based snapshots on OCFS2 and ext3 filesystems under
> dm-multipath.  Before I snapshot the filesystem, I unmount and delete
> the previous night's snapshot LUNs.  Doing so causes (correctly)
> multipathd to output the following errors:
>  
> <snip>
> ...
> Jul 14 03:16:02 ausracdbd01 multipathd: mpath19: remaining active paths:
> 7
> Jul 14 03:16:02 ausracdbd01 multipathd: sdci: tur checker reports path
> is down
> Jul 14 03:16:02 ausracdbd01 kernel: device-mapper: multipath: Failing
> path 69:80.
> Jul 14 03:16:02 ausracdbd01 multipathd: sdco: tur checker reports path
> is down
> ....
> </snip>
>  
> During this snapshot time, I would like to temporarily turn off the
> verbosity of multipathd.  Is this possible?  It's mostly an annoyance
> factor for me because our nightly centralized syslog scan picks up words
> like 'fail' and generates a report to the system administrators (which
> we then have to ignore for these messages).
> 
Why not just remove the multipath from the multipathd topology before deleting the snapvol ?

multipathd -k"del map mpath19"

Regards,
cvaroqui