Let me first say that you have revealed something I need to fix -- thanks :)
There is one way to truly see exactly what parameters are set in the
configuration log.
1. Unmount the MGS
2. Mount the MGS disk as type 'ldiskfs'
# mount -t ldiskfs /dev/sda /mnt/mgs
3. Use the llog-reader utility to display the contents of the various
configuration logs under the CONFIGS dir
# /usr/sbin/llog-reader /mnt/mgs/CONFIGS/testfs-client
4. Look for items marked "param"
5. Check the other logs for parameters that affect those targets (e.g.
testfs-MDT0000 for MDT settings)
Finally, although it is easy to change a parameter, there is currently
no simple way to delete a parameter. You have to shutdown all targets
and do a '--writeconf' to regenerate the logs. You must then add back
all your modified settings.
You can in fact set your modified settings for each device at the same
time you writeconf
mdt# tunefs.lustre --writeconf --param="failover.mode=failout" /dev/sda
ost1# tunefs.lustre --writeconf --erase-params
--param="[EMAIL PROTECTED]"
--param="osc.max_dirty_mb=29.15" /dev/sda
(Use the --erase-params flag to clear old parameters out of the tunefs
list (further note that without --writeconf, clearing the parameters
from the tunefs list has no effect.))
If you change your parameters exclusively via tunefs (i.e. not using
lctl), then tunefs.lustre --print will show you the parameters. For
production systems, this is probably the preferred way of setting
parameters, because these parameters will survive a --writeconf, whereas
parameters set via 'lctl conf_param' will not.
miFor wrote:
some parameters dont exist in /proc, example : failover.mode .
sometimes i typed a wrong word when i set the parameter,
lctl conf_param testfs-OST0000.osc.activat=0 (miss "e")
when a other client mount the testfs,it report a error msg : unknow
command activat xxxxxxx
some incoreect parameters lead mount failed.
so i want to view all the parameters and i can delete the incorrect
ones manual
2007/3/9, Nathaniel Rutman < [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>>:
That's a fine question. I assume you mean all non-default
parameters;
to see all parameters, you could walk the /proc/fs/lustre tree and
print
out writable files.
But I think the real answer to your question is that I need to
provide a
nice easy way from lctl, but that doesn't exist yet.
miFor wrote:
> sorry for my poor english.
>
> i can set a param by lctl conf_param,but how can i view all the
param ?
>
> lustre 1.5.97
>
> --
>
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