[lustre-discuss] What happens if my stripe count is set to more than my number of stripes

[Drokin, Oleg]

Hello!

   The allocator is not really playing it's role just yet, this is just code that stores your desired striping in the directory for later use.
   But if you call into allocator (at file creation time) with these parameters, it would just assume you want all your current OSTs and that's it.

Bye,
    Oleg
On Apr 20, 2015, at 1:43 PM, Michael Kluge wrote:

> Hi Oleg,
> 
> I tried it and looks like it actually stores the 128 stripe size (at least for dirs). lfs getstripe tells me that my dir is now striped over 128 OSTs (I have 48).
> 
> [/scratch/mkluge] lctl dl | grep osc | wc -l
> 48
> [/scratch/mkluge] mkdir  p
> [/scratch/mkluge] lfs setstripe -c 128 p
> [/scratch/mkluge] lfs getstripe p
> p
> stripe_count:   128 stripe_size:    1048576 stripe_offset:  -1
> 
> 
> Regards, Michael
> 
> Am 20.04.2015 um 18:44 schrieb Drokin, Oleg:
>> Hello!
>> 
>> Current allocator behaviour is such that when you specify more
>> stripes than you have OSTs, it'll treat it the same as if you set
>> stripe count to -1 (that is - the maximum possible stripes).
>> 
>> Bye, Oleg On Apr 20, 2015, at 4:47 AM, <Prakrati.Agrawal at shell.com>
>> <Prakrati.Agrawal at shell.com> wrote:
>> 
>>> Hi,
>>> 
>>> I have a doubt regarding Lustre file system. If I have a file of
>>> size 64 GB and I set stripe size to 1GB, my number of stripes
>>> become 64. But if I set my stripe count as 128, what does the
>>> Lustre do in that case?
>>> 
>>> Thanks and Regards, Prakrati
>>> _______________________________________________ lustre-discuss
>>> mailing list lustre-discuss at lists.lustre.org
>>> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
>> 
>> _______________________________________________ lustre-discuss
>> mailing list lustre-discuss at lists.lustre.org
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>> 
> 
> 
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