[Bugs] [Bug 1375125] arbiter volume write performance is bad.

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1375125

humaorong <maorong.hu at horebdata.cn> changed:

           What    |Removed                     |Added
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              Flags|                            |needinfo?(ravishankar at redha
                   |                            |t.com)



--- Comment #9 from humaorong <maorong.hu at horebdata.cn> ---
  Hi Ravishankar N :
     I test as follow :

  gluster volume is replication 3 not arbiter :
[root at horeba ~]# gluster volume info data_volume

Volume Name: data_volume
Type: Replicate
Volume ID: 48d74735-db85-44e8-b0d2-1c8cf651418c
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x 3 = 3
Transport-type: tcp
Bricks:
Brick1: 192.168.10.71:/data_sdc/brick3
Brick2: 192.168.10.72:/data_sdc/brick3
Brick3: 192.168.10.73:/data_sdc/brick3

 disable   features.shard ,performance OK :
[root at horebc mnt]# for i in `seq 3`; do dd if=/dev/zero of=./file   bs=1G
count=1 oflag=direct ; done
1+0 records in
1+0 records out
1073741824 bytes (1.1 GB) copied, 1.85306 s, 579 MB/s
1+0 records in
1+0 records out
1073741824 bytes (1.1 GB) copied, 1.85131 s, 580 MB/s
1+0 records in
1+0 records out
1073741824 bytes (1.1 GB) copied, 1.85037 s, 580 MB/s

 enable    features.shard ,performance OK also :
[root at horebc mnt]# for i in `seq 3`; do dd if=/dev/zero of=./filetest   bs=1G
count=1 oflag=direct ; done
1+0 records in
1+0 records out
1073741824 bytes (1.1 GB) copied, 1.84995 s, 580 MB/s
1+0 records in
1+0 records out
1073741824 bytes (1.1 GB) copied, 1.87079 s, 574 MB/s
1+0 records in
1+0 records out
1073741824 bytes (1.1 GB) copied, 1.85104 s, 580 MB/s

   so now only relication 3 arbiter 1 volume enable features.shard  have
performace bad

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