[dm-devel] [Lsf-pc] [LSF/MM ATTEND]: Hot spare module ? And Btrfs volume management without mount

[Anand Jain]

Thanks for the reply.

  now based on your advise, if my participation is confirmed, by march,
  I would come up with a concrete proposal or an experimental code
  to share results at the conference if needed.

Thanks, Anand


On 01/27/2015 06:18 PM, Jan Kara wrote:
>    Hi,
>
>    I'm replying somewhat late but when going through attend requests I was
> wondering:
>
> On Fri 16-01-15 15:44:52, Anand Jain wrote:
>> 1.
>>   Hot spare: is an important feature for the data centers. Hot spare
>>   feature is common to MD, LVM and btrfs. And each of it locks in
>>   resource to be used only at the event of failure. A system running more
>>   than one type of VM like LVM and btrfs would end up having hot spares
>>   assigned to each of the different VMs which looks system under
>>   utilized.
>>
>>   So to increase the utilization of disk hot spares with in the system,
>>   a common kernel module with API could do a job better, with some
>>   additional features.
>>
>>   If needed I can provide a shot talk (just talk no slides) so to obtain
>>   feedback and comments from the experts and have discussions.
>    Do you have a concrete proposal or even patches for the module? Because I
> guess the general idea is fine but the issue may be in how should we
> exactly tie into LVM and btrfs. So without the details there won't be
> much to discuss...
>
> 									Honza
>