Re: nfs-ganesha/pnfs read/write path on EC volume

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On 18/03/16 11:04, Serkan Çoban wrote:
I am using 2.3. But I can test 2.4 if there are centos packages..
Or I can try to build rpm packages from latest ganesha if it is easy to build..
Unfortunately I can't find any epel/centos[1] packages for 2.4, its only for fedora24[2] packages
CCing Kaleb who knows about next 2.3.x update.

Following are the steps used in ci.centos.org to build rpms(I hope it works)

# install NFS-Ganesha build dependencies
yum -y install git bison flex cmake gcc-c++ libacl-devel krb5-devel dbus-devel libnfsidmap-devel libwbclient-devel libcap-devel libblkid-devel rpm-build redhat-rpm-config

# install the latest version of gluster
yum -y install centos-release-gluster
yum -y install glusterfs-api-devel

git init nfs-ganesha
cd nfs-ganesha
git fetch https://review.gerrithub.io/ffilz/nfs-ganesha next

git checkout -b next FETCH_HEAD

# update libntirpc
git submodule update --init || git submodule sync

mkdir build
cd build

cmake -DCMAKE_BUILD_TYPE=Maintainer ../src && make rpm

[1] http://mirror.centos.org/centos-7/7.2.1511/storage/x86_64/gluster-3.7/
[2] http://arm.koji.fedoraproject.org/koji/packageinfo?packageID=17239

--
Jiffin
On Fri, Mar 18, 2016 at 7:03 AM, Jiffin Tony Thottan
<jthottan@xxxxxxxxxx> wrote:

On 17/03/16 23:17, Serkan Çoban wrote:
Hi Jiffin,
Will these patches land in 3.7.9?

Hi Serkan,

I moved all changes to ganesha [1] and got merged upstream (ganesha
V2.4-dev-9),
I missed to back port it to 2.3, so which ganesha build are u using?

[1] https://review.gerrithub.io/#/c/263180/

Jiffin

Serkan

On Tue, Feb 16, 2016 at 2:47 PM, Jiffin Tony Thottan
<jthottan@xxxxxxxxxx> wrote:
Hi Serkan,

I had moved out previous gfapi-side to ganesha and include all those
change
in single patch https://review.gerrithub.io/#/c/263180/

I will try get it reviewed and merge the patch as soon as possible.

With Regards,
Jiffin

On 14/02/16 21:54, Serkan Çoban wrote:
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@xxxxxxxxxx> 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@xxxxxxxxxx> 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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