Databases Reference
In-Depth Information
Table 12-8 lists the MB/Sec results.
Table 12-8: Summary of 1 and 2 Disk Test Results
Test
1 Disk
2 Disk
Random Read
12.81
12.6
Random Write
24.85
51.35
Sequential Read
59
102.3
Sequential Write
59
99.6
So it looks like Random Read will stay at around 12MB/Sec, Random Write should almost double to
close to 100MB/Sec, and sequential access should double to around 200MB/Sec.
Let's take a look at the results and see what you actually got (see Table 12-9).
Table 12-9: Four-Disk Test E Results
Read/Write
Sequential/Random
Block Size
IOPS
MB/Sec
Avg Latency
W
random
8
1037.4
8.1
0
W
random
16
857
13.39
0
W
random
32
625.29
19.54
1
W
random
64
344.5
21.53
2
W
random
128
255.9
31.98
3
W
random
256
171.8
42.95
5
W
random
512
130.4
65.2
7
W
random
1024
95.9
95.9
9
W
random
8192
11.82
94.6
83
R
random
8
140.4
1.09
6
R
random
16
136.4
2.13
6
R
random
32
123.9
3.87
7
Continued
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