开始测试
首先从Oracle网站上下载软件。
解压到你指定的位置，我将其解压到Oracle Enterprise Linux 5 GA的tmp文件夹下，在Linux下你需要gunzip orion10.2_linux.gz，在Windows下你只需要运行MSI文件即可。
创建一个文件：我们创建了一个文件11gtest.lun，并将它添加到共享磁盘上，我们将用与Oracle 11g ASM和OCR文件。
将共享磁盘添加到文件中，我们添加了以下磁盘：
/dev/sdc1
/dev/sdd1
/dev/sde1
/dev/sdf1
使用dd命令检查所有选择的卷或磁盘，输入man dd查看其语法。
1024+0 records in
1024+0 records out
33554432 bytes (34 MB) copied, 0.92155 seconds, 36.4 MB/s
检查你的平台查看是否已经为异步I/O安装了必要的库，libaio这个库应该安装在Oracle Linux版本下，Windows自动支持异步I/O。
Ok，一切就绪，我们将使用下面的命令启动测试：
ORION: ORacle IO Numbers -- Version 10.2.0.1.0
Test will take approximately 30 minutes
Larger caches may take longer
现在发生的是I/O负载水平并记录到输出文件中，总共产生了多个输出文件：
1.11gtest_summary 包括下面的数据输入参数，最大吞吐量，最大I/O速率和最小等待：
ORION VERSION 10.2.0.1.0
Commandline:
-run simple -testname 11gtest -num_disks 4
This maps to this test:
Test: 11gtest
Small IO size: 8 KB
Large IO size: 1024 KB
IO Types: Small Random IOs, Large Random IOs
Simulated Array Type: CONCAT
Write: 0%
Cache Size: Not Entered
Duration for each Data Point: 60 seconds
Small Columns:, 0
Large Columns:, 0, 1, 2, 3, 4, 5, 6, 7, 8
Total Data Points: 29
Name: /dev/sdc1 Size: 536854528
Name: /dev/sdd1 Size: 213893120
Name: /dev/sde1 Size: 4293563904
Name: /dev/sdf1 Size: 4293563904
4 FILEs found.
Maximum Large MBPS=34.47 @ Small=0 and Large=2
Maximum Small IOPS=185 @ Small=17 and Large=0
Minimum Small Latency=7.45 @ Small=1 and Large=0
2.11gtest_mbps.csv 这个文件包括大型随机/连续负载的数据传输速率(MBPS)，他们包括所有CSV文件(二维数据)，你必须要手工导入才能获得图形数据，或者保存为excel文件，然后绘制成图表，它看起来象什么呢?
12, 13, 14, 15, 16, 17, 18, 19, 20
1, 28.91
2, 34.47
3, 34.22
4, 33.23
5, 31.90
6, 34.01
7, 32.96
8, 33.46
3.11gtest_iops.csv 这个文件包括小型随机负载I/O吞吐量结果，我们来看一看这个文件的内容：
12, 13, 14, 15, 16, 17, 18, 19, 20
0, 134, 153, 160, 170, 170, 169, 176, 180, 161, 181, 179,
178, 183, 178, 177, 182, 185, 179, 173, 172
1
2
3
4
5
6
7
8
4.11gtest_lat.csv 小型随机负载等待结果，示例数据：
12, 13, 14, 15, 16, 17, 18, 19, 20
0, 7.45, 13.01, 18.72, 23.52, 29.34, 35.34, 39.72, 44.23, 55.63, 55.08, 61.41,
67.13, 70.80, 78.50, 84.43, 87.84, 91.72, 100.50, 109.49, 116.13
1
2
3
4
5
6
7
8
5.11gtest_trace file：这个文件包括所有未加工的数据，开始和结尾如下：
Point 1 (small=0, large=0) of 29
Valid small 1 Valid large 1
Valid
ran (small): VLun = 0 Size = 9337875456
ran (small): Index = 0 Count = 8048 Avg Lat = 7.45
ran (small): nio=8048 nior=8048 niow=0 req w%=0 act w%=0
ran (small): my 1 oth 0 iops 134 size 8 K lat 7.45 ms bw = 1.05 MBps dur 59.97 s READ
Point 2 (small=1, large=0) of 29
Valid small 1 Valid large 1
Valid
ran (small): VLun = 0 Size = 9337875456
ran (small): Index = 0 Count = 4610 Avg Lat = 13.00
ran (small): Index = 1 Count = 4599 Avg Lat = 13.02
ran (small): nio=9209 nior=9209 niow=0 req w%=0 act w%=0
ran (small): my 2 oth 0 iops 153 size 8 K lat 13.01 ms bw = 1.20 MBps dur 59.94 s READ
Point 3 (small=2, large=0) of 29
Valid small 1 Valid large 1
Valid
ran (small): VLun = 0 Size = 9337875456
ran (small): Index = 0 Count = 3205 Avg Lat = 18.70
ran (small): Index = 1 Count = 3197 Avg Lat = 18.75
ran (small): Index = 2 Count = 3199 Avg Lat = 18.73
ran (small): nio=9601 nior=9601 niow=0 req w%=0 act w%=0
ran (small): my 3 oth 0 iops 160 size 8 K lat 18.72 ms bw = 1.25 MBps dur 59.94 s READ
-
-
-
-
Point 27 (small=0, large=6) of 29
Valid small 1 Valid large 1
Valid
ran (large): VLun = 0 Size = 9337875456
ran (large): Index = 0 Count = 279 Avg Lat = 213.26
ran (large): Index = 1 Count = 281 Avg Lat = 212.17
ran (large): Index = 2 Count = 282 Avg Lat = 211.49
ran (large): Index = 3 Count = 281 Avg Lat = 212.03
ran (large): Index = 4 Count = 279 Avg Lat = 213.37
ran (large): Index = 5 Count = 282 Avg Lat = 211.42
ran (large): Index = 6 Count = 281 Avg Lat = 212.17
ran (large): nio=1965 nior=1965 niow=0 req w%=0 act w%=0
ran (large): my 7 oth 0 iops 32 size 1024 K lat 212.27 ms bw = 32.96 MBps dur 59.61 s READ
Point 28 (small=0, large=7) of 29
Valid small 1 Valid large 1
Valid
ran (large): VLun = 0 Size = 9337875456
ran (large): Index = 0 Count = 247 Avg Lat = 240.04
ran (large): Index = 1 Count = 247 Avg Lat = 240.69
ran (large): Index = 2 Count = 245 Avg Lat = 240.33
ran (large): Index = 3 Count = 251 Avg Lat = 235.70
ran (large): Index = 4 Count = 254 Avg Lat = 232.80
ran (large): Index = 5 Count = 250 Avg Lat = 235.24
ran (large): Index = 6 Count = 247 Avg Lat = 240.24
ran (large): Index = 7 Count = 243 Avg Lat = 243.83
ran (large): nio=1984 nior=1984 niow=0 req w%=0 act w%=0
ran (large): my 8 oth 0 iops 33 size 1024 K lat 238.56 ms bw = 33.46 MBps dur 59.30 s READ
Point 29 (small=0, large=8) of 29
Valid small 1 Valid large 1
Valid
TEST END
使用外部磁盘：我建议使用FireWire 400/800，500GB。
总结
Orion是一个伟大的测试硬件I/O状态的工具，一个配置不当的磁盘I/O性能会很低，这样的磁盘也不应该出现在你的Oracle RAC中。
