[lustre-discuss] lctl set_param not setting values permanently

Andreas Dilger adilger at whamcloud.com
Thu Nov 8 11:14:28 PST 2018


Jira is your friend. This is a known bug and fixed in 2.12.  LU-10906.  

Cheers, Andreas

> On Nov 8, 2018, at 09:25, Riccardo Veraldi <Riccardo.Veraldi at cnaf.infn.it> wrote:
> 
> Hello,
> 
> I did set a bunch of params from the MDS so that they can be taken up by the Lustre clients
> 
> lctl set_param -P osc.*.checksums=0
> lctl set_param -P timeout=600
> lctl set_param -P at_min=250
> lctl set_param -P at_max=600
> lctl set_param -P ldlm.namespaces.*.lru_size=2000
> lctl set_param -P osc.*.max_rpcs_in_flight=64
> lctl set_param -P osc.*.max_dirty_mb=1024
> lctl set_param -P llite.*.max_read_ahead_mb=1024
> lctl set_param -P llite.*.max_cached_mb=81920
> lctl set_param -P llite.*.max_read_ahead_per_file_mb=1024
> lctl set_param -P subsystem_debug=0
> 
> it works but  not for osc.*.checksums=0
> 
> every time a client reboots and the filesystem is remounted I have to lctl set_param -P osc.*.checksums=0 on the MDS again so that
> 
> all the clients will take again this setting. I do not know why this happens. Any clue ?
> 
> I am using Lustre 2.10.5  Centos 7 with kernel 3.10.0-862.14.4.el7.x86_64
> 
> thanks
> 
> Riccardo
> 
> 
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