[lustre-discuss] set_param permanent on client side ?
Riccardo Veraldi
Riccardo.Veraldi at cnaf.infn.it
Mon May 28 13:18:54 PDT 2018
the problem is that some of these parameters seems like are not there on
the MDS side
lctl get_param osc.*.checksums
error: get_param: param_path 'osc/*/checksums': No such file or directory
lctl get_param osc.*.max_pages_per_rpc
error: get_param: param_path 'osc/*/max_pages_per_rpc': No such file or
directory
lctl get_param llite.*.max_cached_mb
only some of them are on the MDS side
lctl get_param osc.*.max_rpcs_in_flight
osc.drpffb-OST0001-osc-MDT0000.max_rpcs_in_flight=64
osc.drpffb-OST0002-osc-MDT0000.max_rpcs_in_flight=64
osc.drpffb-OST0003-osc-MDT0000.max_rpcs_in_flight=64
On 5/23/18 1:15 AM, Artem Blagodarenko wrote:
> Hello Riccardo,
>
> There is “lctl set_param -P” command that set parameter permanently. It needs to be executed on MGS server (and only MGS must be mounted), but parameter is applied to given target (or client). From your example:
>
> lctl set_param -P osc.*.checksums=0
>
> Will execute “set_param osc.*.checksums=0” on all targets.
>
> Best regards,
> Artem Blagodarenko.
>
>> On 23 May 2018, at 00:11, Riccardo Veraldi <Riccardo.Veraldi at cnaf.infn.it> wrote:
>>
>> Hello,
>>
>> how do I set_param in a persistent way on the lsutre clinet side so that
>> it has not to be set every time after reboot ?
>>
>> Not all of these parameters can be set on the MDS, for example the osc.* :
>>
>> lctl set_param osc.*.checksums=0
>> lctl set_param timeout=600
>> lctl set_param at_min=250
>> lctl set_param at_max=600
>> lctl set_param ldlm.namespaces.*.lru_size=2000
>> lctl set_param osc.*.max_rpcs_in_flight=64
>> lctl set_param osc.*.max_dirty_mb=1024
>> lctl set_param llite.*.max_read_ahead_mb=1024
>> lctl set_param llite.*.max_cached_mb=81920
>> lctl set_param llite.*.max_read_ahead_per_file_mb=1024
>> lctl set_param subsystem_debug=0
>>
>> thank you
>>
>>
>> Rick
>>
>>
>>
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