[Bugs] [Bug 1431955] [Disperse] Implement open fd heal for disperse volume

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1431955



--- Comment #3 from Ashish Pandey <aspandey at redhat.com> ---

We will also need to disable some performance option to actually open an FD 
in step - 4 for those bricks which are UP.

1 - gluster v set vol performance.lazy-open no
2 - gluster v set vol performance.read-after-open yes

[root at apandey /]# gluster v info

Volume Name: vol
Type: Disperse
Volume ID: d007c6c2-98da-4cd9-8d5e-99e0e3f37012
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x (2 + 1) = 3
Transport-type: tcp
Bricks:
Brick1: apandey:/home/apandey/bricks/gluster/vol-1
Brick2: apandey:/home/apandey/bricks/gluster/vol-2
Brick3: apandey:/home/apandey/bricks/gluster/vol-3
Options Reconfigured:
disperse.background-heals: 0
cluster.disperse-self-heal-daemon: disable
performance.read-after-open: yes
performance.lazy-open: no
transport.address-family: inet
nfs.disable: on


[root at apandey glusterfs]# gluster v status
Status of volume: vol
Gluster process                             TCP Port  RDMA Port  Online  Pid
------------------------------------------------------------------------------
Brick apandey:/home/apandey/bricks/gluster/
vol-1                                       49152     0          Y       6297 
Brick apandey:/home/apandey/bricks/gluster/
vol-2                                       49153     0          Y       5865 
Brick apandey:/home/apandey/bricks/gluster/
vol-3                                       49154     0          Y       5884 

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


After bringing the brick vol-1 UP and writing data on FD.


[root at apandey glusterfs]# cat /home/apandey/bricks/gluster/vol-1/dir/file
[root at apandey glusterfs]# cat /home/apandey/bricks/gluster/vol-2/dir/file
abc
abc
abc
abc
abc
abc
abc
abc
abc
abc
abc
[root at apandey glusterfs]# cat /home/apandey/bricks/gluster/vol-3/dir/file
abc
abc
abc
abc
abc
abc
abc
abc
abc
abc
abc
abc
abc
abc
abc
abc
abc
abc
abc
abc
abc
abc
[root at apandey glusterfs]# 




[root at apandey glusterfs]# getfattr -m. -d -e hex
/home/apandey/bricks/gluster/vol-*/dir/file
getfattr: Removing leading '/' from absolute path names
# file: home/apandey/bricks/gluster/vol-1/dir/file
security.selinux=0x756e636f6e66696e65645f753a6f626a6563745f723a757365725f686f6d655f743a733000
trusted.ec.config=0x0000080301000200
trusted.ec.dirty=0x000000000000000b000000000000000b
trusted.ec.size=0x0000000000000000
trusted.ec.version=0x00000000000000000000000000000001
trusted.gfid=0xf8cf475afa5e4873bf2274f45278f74f

# file: home/apandey/bricks/gluster/vol-2/dir/file
security.selinux=0x756e636f6e66696e65645f753a6f626a6563745f723a757365725f686f6d655f743a733000
trusted.bit-rot.version=0x020000000000000058ea10fd0005a7ee
trusted.ec.config=0x0000080301000200
trusted.ec.dirty=0x000000000000000c000000000000000c
trusted.ec.size=0x000000000000002c
trusted.ec.version=0x000000000000000c000000000000000d
trusted.gfid=0xf8cf475afa5e4873bf2274f45278f74f

# file: home/apandey/bricks/gluster/vol-3/dir/file
security.selinux=0x756e636f6e66696e65645f753a6f626a6563745f723a757365725f686f6d655f743a733000
trusted.bit-rot.version=0x020000000000000058ea110100063c59
trusted.ec.config=0x0000080301000200
trusted.ec.dirty=0x000000000000000c000000000000000c
trusted.ec.size=0x000000000000002c
trusted.ec.version=0x000000000000000c000000000000000d
trusted.gfid=0xf8cf475afa5e4873bf2274f45278f74

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