[Lustre-discuss] df running slow

Jon Tegner tegner at foi.se
Thu Nov 27 00:42:16 PST 2014

Thanks a lot!

I'm running 2.5.3 on the clients as well. When I try to run

lctl set_param lustre-OST0003-osc*.active=0

lustre complains with:

set_param: /proc/{fs,sys}/{lnet,lustre}/lustre-OST0003-osc*/active

so there seems to be a path issue here, since there is a file


which indeed already has the content "0".

Regarding "writeconf" (thanks for this hint as well) I was a bit scared 
of using it since the manual states that it should be used with caution, 
and since performance tests indicate that read and writes are performed 
with the expected speed (so at the moment I don't see any other problem 
than "df" running slow). Still suspect I have done something wrong, 
since it worked OK before the reboot.



On 11/26/2014 06:00 PM, Alexander I Kulyavtsev wrote:
> Try
> /usr/sbin/lctl set_param osc.lustre-OST0001-*.active=0
> as workarownd on client host, with proper names for filesystem and ost 
> names for all retired OSTs.
> We had 'df' hanging on client after we retired some OSTs on 1.8.9 
> system and now keep this mantra in rc.local .
> What client version do you have,  2.5.3  or 1.8.x?
> Alex.
> On Nov 26, 2014, at 6:59 AM, Jon Tegner <tegner at foi.se 
> <mailto:tegner at foi.se>> wrote:
>> Hi!
>> I recently got some help regarding removing an OSS/OST from the file 
>> system. Last thing I did was to permanently remove it with (on the MDS):
>> lctl conf_param ost_name.osc.active=0
>> This all seems to be working, and on the clients, the command
>> lctl dl
>> indicates the OSS/OST is inactive. However, after a reboot of the 
>> clients the same command no longer indicates the removed OSS/OST to 
>> be inactive. Besides, the command
>> df
>> Takes almost 2 minutes to complete.
>> I'm probably doing something really stupid here, and would be happy 
>> if someone could tell me what it is ;-)
>> Running 2.5.3.
>> Regards,
>> /jon
>> _______________________________________________
>> Lustre-discuss mailing list
>> Lustre-discuss at lists.lustre.org <mailto:Lustre-discuss at lists.lustre.org>
>> http://lists.lustre.org/mailman/listinfo/lustre-discuss

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.lustre.org/pipermail/lustre-discuss-lustre.org/attachments/20141127/d499d4e5/attachment.htm>

More information about the lustre-discuss mailing list