[Lustre-discuss] client randomly evicted

[Yong Fan]

Robin Humble 写道:
> On Fri, May 02, 2008 at 03:16:31PM -0700, Andreas Dilger wrote:
>   
>> On Apr 30, 2008  11:40 -0400, Aaron Knister wrote:
>>     
>>> Some more information that might be helpful. There is a particular code 
>>> that one of our users runs. Personally after the trouble this code has 
>>> caused us we'd like to hand him a calculator and disable his accounts but 
>>> sadly that's not an option. Since the time of the hang, there is what seems 
>>> to be one process associated with lustre that is running as the userid of 
>>> the problem user- "ll_sa_15530". A trace of this process in its current 
>>> state shows this -
>>>
>>> Is this a problem with the lustre readahead code? If so would this fix it? 
>>> "echo 0 > /proc/fs/lustre/llite/*/statahead_count "
>>>       
>> Yes, this appears to be a statahead problem.  There were fixes added to
>> 1.6.5 that should resolve the problems seen with statahead.  In the meantime
>> I'd recommend disabling it as you suggest above.
>>     
>
> we're seeing the same problem.
>
> I think the workaround should be:
>   echo 0 > /proc/fs/lustre/llite/*/statahead_max
> ??
>
> /proc/fs/lustre/llite/*/statahead_count is -r--r--r--
>   
Sure.
"/proc/fs/lustre/llite/*/statahead_count" is statistics variable.
"/proc/fs/lustre/llite/*/statahead_max " is the switch for 
enable/disable directory statahead.

Regrads!
--
Fan Yong
> cheers,
> robin
>
> ps. sorry I've been too busy this week to look at the llite_lloop stuff.
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