[Gluster-users] nfs-ganesha/pnfs read/write path on EC volume

[Jiffin Tony Thottan]

Hi,

Sorry for the delayed delayed response

On 10/02/16 13:51, Pranith Kumar Karampuri wrote:
>
>
> On 02/10/2016 01:15 PM, Serkan Çoban wrote:
>> Hi Jiffin,
>>
>> Any update about the write path?
> I saw him send some mails related to this, yesterday and day before. 
> You will hear from him soon.
>
> Pranith
>>
>> Serkan
>>
>> On Sun, Jan 31, 2016 at 5:00 PM, Jiffin Tony Thottan
>> <jthottan at redhat.com> wrote:
>>>
>>> On 31/01/16 16:19, Serkan Çoban wrote:
>>>> Hi,
>>>> I am testing nfs-ganesha with pNFS on EC volume and I want to ask some
>>>> questions.
>>>> Assume we have two clients: c1,c2
>>>> and six servers with one 4+2 EC volume constructed as below:
>>>>
>>>> gluster volume create vol1 disperse 6 redundancy 2 
>>>> server{1..6}:/brick/b1
>>>> \
>>>>
>>>>        server{1..6}:/brick/b2 \
>>>>
>>>>        server{1..6}:/brick/b3 \
>>>>
>>>>        server{1..6}:/brick/b4 \
>>>>
>>>>        server{1..6}:/brick/b5 \
>>>>
>>>>        server{1..6}:/brick/b6
>>>> vol1 is mounted on both clients as server1:/vol1
>>>>
>>>> Here is first question: When I write file1 from client1 and file2 from
>>>> client2; which servers get the files? In my opinion server1 gets file1
>>>> and server2 gets file2 and do EC calculations and distribute chunks to
>>>> other servers. Am I right?
>>>>
>>>> Can anyone explain detailed read/write path with pNFS and EC volumes?
>>>
Currently in pNFS cluster , request is send to the first DS available in 
the list.
So I am to planning to distribute different files among the available 
DS, as a first step
I had send out patch in gluster (http://review.gluster.org/#/c/13402/)
After this one got merged, there are certain changes in ganesha side too.
I had tested both changes in my setup and it was working as accepted.

Once again thanks for pointing out this issue

--
Regards,
Jiffin



>>> I never tried pNFS with EC volume, will try the same by my own and 
>>> reply to
>>> your question as soon as possible.
>>> -- 
>>> Jiffin
>>>
>>>> Thanks,
>>>> Serkan
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