[Bugs] [Bug 1207204] Data Tiering:Adding tier to Disperse(erasure code) volume is converting volume to distribute-disperse instead of tier-disperse type

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1207204

nchilaka <nchilaka at redhat.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|unspecified                 |high
             Blocks|                            |1186580
                   |                            |(qe_tracker_everglades)
           Assignee|bugs at gluster.org            |josferna at redhat.com
            Summary|Data Tiering                |Data Tiering:Adding tier to
                   |                            |Disperse(erasure code)
                   |                            |volume is converting volume
                   |                            |to distribute-disperse
                   |                            |instead of tier-disperse
                   |                            |type



--- Comment #1 from nchilaka <nchilaka at redhat.com> ---
Submitted by mistake before filling in the info. Hence adding the info

Description of problem:
======================
When i tried to add a tier to EC volume, the bricks were consumed as though it
was a distribute bricks.
That means the volume is getting converted to distribute-disperse.
There are no tier xattrs too.
We need to support tier with disperse/EC volume as this is a usecase where
cutomers would want to use a cold tier as disperse type with the hot tier as
SSDs


Version-Release number of selected component (if applicable):
============================================================
3.7 upstream nightlies build
http://download.gluster.org/pub/gluster/glusterfs/nightly/glusterfs/epel-6-x86_64/glusterfs-3.7dev-0.821.git0934432.autobuild//

root at interstellar glusterfs]# gluster --version
glusterfs 3.7dev built on Mar 28 2015 01:05:28
Repository revision: git://git.gluster.com/glusterfs.git
Copyright (c) 2006-2011 Gluster Inc. <http://www.gluster.com>
GlusterFS comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of GlusterFS under the terms of the GNU General
Public License.


Steps to Reproduce:
===================

1. Create a disperse volume and start it
   [root at interstellar ~]# gluster v create ec1 disperse-data 2 redundancy 1  
transformers:/pavanbrick1/ec1/b1 interstellar:/pavanbrick1/ec1/b1
transformers:/pavanbrick1/ec1/rb1 force
volume create: ec1: success: please start the volume to access data
[root at interstellar ~]# gluster v start ec1
volume start: ec1: success
[root at interstellar ~]# gluster v status ec1
Status of volume: ec1
Gluster process                             TCP Port  RDMA Port  Online  Pid
------------------------------------------------------------------------------
Brick transformers:/pavanbrick1/ec1/b1      49160     0          Y       44215
Brick interstellar:/pavanbrick1/ec1/b1      49160     0          Y       40225
Brick transformers:/pavanbrick1/ec1/rb1     49161     0          Y       44235
NFS Server on localhost                     N/A       N/A        N       N/A  
NFS Server on 10.70.34.44                   N/A       N/A        N       N/A  

Task Status of Volume ec1
------------------------------------------------------------------------------
There are no active volume tasks

2.Now add a tier 
[root at interstellar ~]# gluster v attach-tier ec1
transformers:/pavanbrick2/ec1/hb1 interstellar:/pavanbrick2/ec1/hb1

3.check the vol info
[root at interstellar ~]# gluster v info ec1

Volume Name: ec1
Type: Distributed-Disperse
Volume ID: 1c47d8a3-f26f-4ef5-ad32-7da3462aaa61
Status: Started
Number of Bricks: 1 x (2 + 1) = 5
Transport-type: tcp
Bricks:
Brick1: interstellar:/pavanbrick2/ec1/hb1
Brick2: transformers:/pavanbrick2/ec1/hb1
Brick3: transformers:/pavanbrick1/ec1/b1
Brick4: interstellar:/pavanbrick1/ec1/b1
Brick5: transformers:/pavanbrick1/ec1/rb1



Expected results:
==================
support Tiering with EC properly.


Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1186580
[Bug 1186580] QE tracker bug for Everglades
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