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Raid setup comparison - Part 2/2

posted Sep 10, 2010, 10:23 PM by Ricardo Fonseca   [ updated Sep 15, 2010, 1:14 PM ]
(RAID 5 vs RAID 6 vs RAID 10 )

This follows the first post regarding read / write test comparison against various RAID Setup. Note that in the use case we tested the following partitions :

- a RAID 5 Lun Parition with 5 Disks , 
- a RAID 6 Lun Parition with 5 Disks , 
- two different RAID 10 partition on on a lun using 6 Disks and another one using 8 disks.

The server used is a IBM x336 series with 16GB of RAM, windows 2003 x64 installed. The setup raid was local to the machine, the cache controller was integrated to the machine and its size was 256MB.

Following is the legend table to help you to interpret the different test cases scenario therefore will you find all the detail of each scenario that has been tested :


Test Casethreads#Block Size (KB)Out. RequestDuration
T12641120 seconds
T22642120 seconds
T32644120 seconds
T42648120 seconds
T526416120 seconds
T626432120 seconds
T726464120 seconds
T8264128120 seconds


A. Result extracted for write performance :

  • Table Presentation




T1
T2
T3
T4
T5
T6
T7
T8
1
RAID6 - 
9HD;1T;7200k -
MB/S
25.84
26.84
22.28
26.73
23.07
24.42
30.58
27.22

RAID6 -
9HD;1T;7200k -
IO/S
413.45
429.49
356.55
427.75
369.16
390.77
489.30
435.56
2
RAID5 -
5HD;1T;7200k -
MB/S
17.61
19.51
19.62
20.91
21.00
19.05
21.32
20.20

RAID5 - 
5HD;1T;7200k -
IO/S
281.83
312.24
313.92
334.59
336.14
304.86
341.16
323.32
3
RAID10 - 
6HD;146Go;15kFC -
MB/S
66.41
70.88
73.27
68.22
61.87
62.10
71.78
74.44

RAID10 - 
6HD;146Go;15kFC -
IO/S
1062.70
1134.21
1172.37
1091.59
990.04
993.60
1148.51
1191.04
4
RAID10 - 
8HD;300Go;15kFC -
MB/S
78.41
89.17
100.07
108.70
110.07
108.10
112.21
107.55

RAID10 - 
8HD;300Go;15kFC -
IO/S
1254.59
1426.80
1601.18
1739.20
1761.27
1729.73
1795.36
1720.81



















  • Graph Presentation



B. Result extracted for read performance :

  • Table Presentation



Type
T1
T2
T3
T4
T5
T6
T7
T8
1
RAID6 - 9HD;1T;7200k -
MB/S
21.17
39.34
62.95
86.31
102.64
111.41
119.42
119.62

RAID6 - 9HD;1T;7200k -
IO/S
338.84
629.45
1007.32
1381.07
1642.37
1782.65
1910.72
1913.98
2
RAID5 - 5HD;1T;7200k -
MB/S
15.49
26.56
35.59
42.37
44.22
43.99
44.72
44.45

RAID5 - 5HD;1T;7200k -
IO/S
247.90
425.08
569.53
678.01
707.58
703.85
715.65
711.33
3
RAID10 - 6HD;146Go;15kFC -
MB/S
37.08
60.20
92.65
119.86
124.92
130.66
135.52
137.32

RAID10 - 6HD;146Go;15kFC -
IO/S
593.40
963.34
1482.50
1917.91
1998.84
2090.68
2168.37
2197.15
4
RAID10 - 8HD;300Go;15kFC -
MB/S
41.60
76.63
118.05
174.60
192.70
189.30
180.71
185.79

RAID10 - 8HD;300Go;15kFC -
IO/S
665.60
1226.20
1888.93
2793.66
3083.24
3028.83
2891.40
2972.75


  • Graph Presentation



Result : As for the interpretation of the output we can clearly see that setup in RAID 10 is still the more the most efficient in regards our tests scenarios. For read and write instructions it has demonstraste to be faster quite significantly for reads and even more for write operations.
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