Re: Jerasure 1.2A plugin for Ceph

[Mark Nelson <mark.nelson@inktank.com>]

On 09/11/2013 11:29 AM, Sage Weil wrote:
> On Wed, 11 Sep 2013, Loic Dachary wrote:
>> [cc'ing the devel mailing list]
>>
>> Hi James,
>>
>> Thanks for the positive feedback :-) I found the API fairly
>> straightforward and I don't see what could be improved. However, I've
>> learnt about erasure code and designed the Ceph plugin abstract API
>> mostly by studying jerasure. I'm probably biased : let hear what others
>> have to suggest.
>>
>> Cheers
>>
>> On 11/09/2013 17:04, James Plank wrote:
>>> Hi Loic -- I took a scan, and it looks like a nice usage of the
>>> library.  Here's a question -- for the next revision of jerasure, are
>>> there any functionalities that you would like to see, that would make
>>> your life as a developer easier?  Thanks!  Jim ----------
>
> Hi James-
>
> Late to this discussion, and this may have already been covered, but:
> there is a bunch of Intel-optimized code floating around for various
> erasure codes.  I would love to see this incorporated into jerasure (with
> automatic arch and CPU feature detection) so that users can transparently
> take advantage of it.
>
> sage
>

+1.  Same for ARM down the road. :D

Mark

>
>>>
>>> On Aug 30, 2013, at 4:20 AM, Loic Dachary wrote:
>>>
>>>> Hi James,
>>>>
>>>> The first version of the jerasure 1.2A plugin for Ceph is complete at
>>>>
>>>> https://github.com/ceph/ceph/pull/538#commits-pushed-763275e
>>>>
>>>> This commit introduces the main part:
>>>> ErasureCodeJerasure: base class for jerasure ErasureCodeInterface
>>>> https://github.com/dachary/ceph/commit/76d2842358465e560a4929d60131762f8c93804f
>>>>
>>>> and each technique is derived from it in six successive commits, starting from here
>>>> ErasureCodeJerasure: define technique ReedSolomonVandermonde
>>>>
>>>> It would be great if you could take a look and let us know if you see anything odd.
>>>>
>>>> Cheers
>>>>
>>>> --
>>>> Lo?c Dachary, Artisan Logiciel Libre
>>>> All that is necessary for the triumph of evil is that good people do nothing.
>>>>
>>>
>>
>> --
>> Lo?c Dachary, Artisan Logiciel Libre
>> All that is necessary for the triumph of evil is that good people do nothing.
>>
>>
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