[Bugs] [Bug 1175214] [RFE] Rebalance Performance Improvements

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1175214

Susant Kumar Palai <spalai at redhat.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
              Group|                            |redhat
                 CC|                            |spalai at redhat.com



--- Comment #1 from Susant Kumar Palai <spalai at redhat.com> ---
Started first iteration of rebalance.

The initial configuration was 3*2. One set of replica pair was added and the
rebalance was triggered. New bricks were added from server gprfs32.

Volume Name: rbperf
Type: Distributed-Replicate
Volume ID: abe337be-5c53-42b3-8de1-c0637341596f
Status: Started
Snap Volume: no
Number of Bricks: 4 x 2 = 8
Transport-type: tcp
Bricks:
Brick1: gprfs029.sbu.lab.eng.bos.redhat.com:/bricks/gprfs029/brick1
Brick2: gprfs029.sbu.lab.eng.bos.redhat.com:/bricks/gprfs029/brick2
Brick3: gprfs030.sbu.lab.eng.bos.redhat.com:/bricks/gprfs030/brick1
Brick4: gprfs030.sbu.lab.eng.bos.redhat.com:/bricks/gprfs030/brick2
Brick5: gprfs031.sbu.lab.eng.bos.redhat.com:/brick/lv_brick01
Brick6: gprfs031.sbu.lab.eng.bos.redhat.com:/brick/lv_brick02
Brick7: gprfs032.sbu.lab.eng.bos.redhat.com:/brick/lv_brick01
Brick8: gprfs032.sbu.lab.eng.bos.redhat.com:/brick/lv_brick02
Options Reconfigured:
performance.readdir-ahead: on
snap-max-hard-limit: 256
snap-max-soft-limit: 90
auto-delete: disable

* Rebalance was started on a data set of 1TB.  And the rebalance took around
7.6 hrs. Here is the stat.

[root at gprfs029 ~]# gluster v rebalance rbperf status
                                    Node Rebalanced-files          size      
scanned      failures       skipped               status   run time in secs
                               ---------      -----------   -----------  
-----------   -----------   -----------         ------------     --------------
                               localhost           216077        96.4GB      
2114874             0         86457            completed           27621.00
[7.6725 hrs]
     gprfs030.sbu.lab.eng.bos.redhat.com           204043        93.6GB      
2087530             0         33709            completed           27610.00
     gprfs031.sbu.lab.eng.bos.redhat.com           218649        85.4GB      
2023583             0         56626            completed           27622.00
     gprfs032.sbu.lab.eng.bos.redhat.com                1       11Bytes      
1898487             0           223            completed           17718.00

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