[lustre-discuss] lfs setstripe resets all values to default

[Anna Fuchs]

Indeed, sorry, I have missed it in jira. In my 2.9.0 it was not
yet fixed.
Thank you for answering. 

Anna



On Mon, 2017-07-03 at 14:58 +0000, Cory Spitz wrote:
> Anna,
> 
> What version of Lustre are you using?
> 
> I believe your issue was reported as https://jira.hpdd.intel.com/brow
> se/LUDOC-171, but that was marked resolved.  Andreas D. commented
> there that “the setstripe will [now] inherit the parameters that are
> not specified from the directory.”  That behavior was changed in
> 2.9.0.  Try that or the latest 2.10 RC to see if the behavior better
> matches your expectations.  Please file new LU/LUDOC tickets if the
> Ops manual, lfs help, or manpage output isn’t clear.
> 
> Thanks,
> -Cory
> 
> -- 
> 
> 
> On 7/3/17, 8:45 AM, "lustre-discuss on behalf of Anna Fuchs" <lustre-
> discuss-bounces at lists.lustre.org on behalf of anna.fuchs at informatik.u
> ni-hamburg.de> wrote:
> 
>     Dear all, 
>     
>     when you set a single parameter via lfs setstripe, all the other
>     parameters will be reset to default values. Is that behavior
> desired? I
>     would expect to overwrite the certain parameter and leave
> everything
>     else as it was. 
>     
>     $ mkdir /mnt/client0/test
>     $ lfs getstripe /mnt/client0/test
>     /mnt/client0/test
>     stripe_count:   1 stripe_size:    1048576 stripe_offset:  -1
>     $ lfs setstripe --stripe-count 2 /mnt/client0/test
>     $ lfs getstripe /mnt/client0/test
>     /mnt/client0/test
>     stripe_count:   2 stripe_size:    1048576 stripe_offset:  -1
>     $ lfs setstripe --stripe-size 131072  /mnt/client0/test
>     $ lfs getstripe /mnt/client0/test
>     /mnt/client0/test
>     stripe_count:   1 stripe_size:    131072 stripe_offset:  -1
>     
>     Reason:
>     lustre/utils/lfs.c:974++
>     
>     	st_size = 0;
>     	st_offset = -1;
>     	st_count = 0;
>     
>     
>     It is not a big deal, but seems counterintuitive to me and is
>     uncomfortable for testing. One could initialize the three
> variables
>     with last used values. What do you think?
>     
>     Regards,
>     Anna
>     _______________________________________________
>     lustre-discuss mailing list
>     lustre-discuss at lists.lustre.org
>     http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
>     
>