[Lustre-discuss] "Setstripe count -1" what's the happen when one of the osts outs of space disk?

[Kevin Van Maren]

Just to clarify,

I believe Andreas is talking about creating the file after the OST is 
already known to be out of space.

If a file is already striped across an OST, when that OST fills up, 
writes that map to that OST will fail
if they require additional storage (ie, overwrites will work, but 
growing the file will return ENOSPC
once you hit the full OST).

Kevin


Andreas Dilger wrote:
> On 2010-04-05, at 02:43, Đào Thị Thảo wrote:
>   
>> I'm using lustre 1.8.0 on Centos 5.0.
>> I have a question as follows: I setstripe file for all osts with  
>> parameter count -1, what's the happen when one of the osts outs of  
>> space disk?
>>     
>
>
> If you specify stripe_count=-1 it will stripe across all "available"  
> OSTs, which should skip the full OST.  If you specify stripe_count=N,  
> where N = number of OSTs (including the full one) then the allocation  
> will fail.
>
> Cheers, Andreas
> --
> Andreas Dilger
> Principal Engineer, Lustre Group
> Oracle Corporation Canada Inc.
>
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