GPFS Performance Report (Uses iozone command)

zsjheng, rock

0. Machine Informance

Node	8 nodes (1 server , 7 client provide disks)
CPU	Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz (each node)
Memory	2GB DDR2 667 (each node)
Disk	320G+160G (each node), All nodes: (320G+ 160G) * 7 = 3.36T
NIC	Intel Corporation 82566DM Gigabit Network Connection
Switch	D-link 24 port GE switch

1. 8 Nodes, No Replicate, Adjust Parameters

$ iozone -g 16g -aRb test.wks

2. 8 Nodes, Replicate, Adjust Parameters

$ iozone -g 16g -aRb test2.wks

3. Comapre

The following six diagrams show the testing results using IOzone as the benchmark to evaluate how GPFS works with and without data-replication. The six IO operations we have done for performance evaluation are write, re-write, read, re-read, random read, and random write opertion, respectively. The left surface chart of each diagram represents the testing with data-replication enable, and the right one is opposite.

4. Running information

gpfs-server:/home/gpfs_mount# ls
iozone.tmp  iozone.tmp.DUMMY  test.wks

gpfs-server:/home/gpfs_mount# du -h
69M     .
gpfs-server:/home/gpfs_mount# du -h
129M    .
gpfs-server:/home/gpfs_mount# du -h
129M    .
gpfs-server:/home/gpfs_mount# du -h
25M     .
gpfs-server:/home/gpfs_mount# du -h
129M    .
gpfs-server:/home/gpfs_mount# du -h
107M    .

gpfs-server:/home/gpfs_mount# dstat -cdn -M gpfs -N eth1
----total-cpu-usage---- -dsk/total- --net/eth1- --gpfs-i/o-
usr sys idl wai hiq siq|_read _writ|_recv _send|_read write
  0   0  98   0   0   2| 622B   13k|   0     0 | 0.3     0 
  1   2  94   0   1   2|   0     0 |   0     0 |  16M   16M
  1   3  90   0   1   6|   0     0 |  43M   53M|   0    24M
  0   1  98   0   0   1|   0     0 |   0     0 |   0    11M
  0   2  92   0   1   5|   0     0 |5653k  120M|   0    19M
  0   2  93   0   1   3|   0     0 |   0     0 |   0    25M
  1   4  88   0   2   6|   0     0 |  13M  187M|   0    33M
  1   3  92   0   1   3|   0     0 |   0     0 |  58M    0 
  1   4  86   0   2   8|   0     0 |   0     0 |  86M    0 
  0   2  95   0   0   2|   0     0 | 140M   34M|  29M    0 
  1   6  86   0   2   6|   0     0 |   0     0 |  87M  128M
  1   4  87   0   1   6|   0     0 | 119M 4232k|  50M    0 
  1   4  87   0   2   6|   0     0 |   0     0 |  51M    0