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

[Serkan Çoban]

Thanks for the answer,
AFAIK, when using pNFS, every different file read/write should go to
different server in order to utilize all servers in parallel.
I am waiting for the patches and future releases.Thanks for all your efforts.

Serkan

On Wed, Feb 10, 2016 at 2:21 PM, Jiffin Tony Thottan
<jthottan at redhat.com> wrote:
> 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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>>>>
>>>>
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>