Oracle压力测试工具ORION
ORION (Oracle I/O Calibration Tool) 是校准用于 Oracle 数据库的存储系统 I/O 性能的独立工具。校准结果对于了解存储系统的性能
1，功能简介
ORION (Oracle I/O Calibration Tool) 是校准用于 Oracle 数据库的存储系统 I/O 性能的独立工具。校准结果对于了解存储系统的性能有很大帮助，不仅可以找出影响 Oracle 数据库性能的问题，还能测量新数据库安装的大小。由于 ORION 是一个独立工具，用户不需要创建和运行 Oracle 数据库。
为了尽可能地模拟 Oracle 数据库，ORION 使用和 Oracle 相同的 I/O 软件集生成一个合成的 I/O 负载。可以将 ORION 配置为生成很多 I/O 负载，包括一个模拟 OLTP 和数据仓库负载的 I/O 负载。
ORION 支持多种平台。将来还会增加对更多平台的支持。用户指南提供详细的使用文档，包括“入门”部分和疑难解答提示。在 ORION 中调用“-help”选项可以直接获取关于如何使用 ORION 的摘要。
2，简单使用过程
下载地址
运行安装
gunzip orion_linux_x86-64
运行测试
生成mytest.lun文件
/dev/mapper/mpath7p1
/dev/mapper/mpath8p1
运行命令
./orion_linux_x86-64 -run simple -testname mytest -num_disks 2
其它方式的命令可以寻求帮助
./orion_linux_x86-64 -help
3，，测试结果
[root@ tmp]# cat mytest_20120629_1519_summary.txt
ORION VERSION 11.1.0.7.0
Commandline:
-run simple -testname mytest -num_disks 2
This maps to this test:
Test: mytest
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
Total Data Points: 15
Name: /dev/mapper/mpath7p1 Size: 536869863424
Name: /dev/mapper/mpath8p1 Size: 536869863424
2 FILEs found.
Maximum Large MBPS=183.53 @ Small=0 and Large=4
Maximum Small IOPS=851 @ Small=10 and Large=0
Minimum Small Latency=11.38 @ Small=3 and Large=0
4，结果比较分析
在压力测试的同时，通过IOSTAT命令也可以简单计算数值，由于采样原因，最大值稍有不同。
IOPS = [dm-13]r/s + [dm-14]r/s + [dm-13]w/s + [dm-14]w/s IOSTAT最大422+424=846
MBPS = ([dm-13]rsec/s + [dm-14]rsec/s)/2/1024 = rMB/s + wMB/s IOSTAT最大94+92=186MBPS
Latency = await 基本11秒左右
[root@ mapper]# iostat -d -x 1 30|grep dm-1[3,4]
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
dm-13 0.00 0.00 25.50 0.00 3386.05 0.00 132.77 0.32 12.57 4.45 11.35
dm-14 0.00 0.00 25.56 0.00 3426.57 0.00 134.04 0.32 12.60 4.44 11.36
dm-13 0.00 0.00 339.00 0.00 5424.00 0.00 16.00 4.01 11.86 2.95 100.10
dm-14 0.00 0.00 328.00 0.00 5248.00 0.00 16.00 3.97 12.00 3.02 99.20
dm-13 0.00 0.00 364.00 0.00 5824.00 0.00 16.00 4.20 11.43 2.74 99.70
dm-14 0.00 0.00 325.00 0.00 5200.00 0.00 16.00 3.78 11.72 3.05 99.10
dm-13 0.00 0.00 340.00 0.00 5440.00 0.00 16.00 3.94 11.64 2.94 99.80
dm-14 0.00 0.00 355.00 0.00 5680.00 0.00 16.00 4.02 11.36 2.82 100.20
[root@ host8]# iostat -d -xm 1 30|grep dm-1[3,4]
Device: rrqm/s wrqm/s r/s w/s rMB/s wMB/s avgrq-sz avgqu-sz await svctm %util
dm-13 0.00 0.00 341.00 0.00 2.66 0.00 16.00 4.07 11.90 2.93 99.80
dm-14 0.00 0.00 343.00 0.00 2.68 0.00 16.00 3.90 11.35 2.92 100.10
dm-13 0.00 0.00 330.00 0.00 2.58 0.00 16.00 3.92 11.89 3.01 99.40
dm-14 0.00 0.00 360.00 0.00 2.81 0.00 16.00 4.04 11.29 2.73 98.40
dm-13 0.00 0.00 342.00 0.00 2.67 0.00 16.00 4.09 12.08 2.90 99.30
dm-14 0.00 0.00 352.00 0.00 2.75 0.00 16.00 3.87 10.89 2.82 99.40
dm-13 0.00 0.00 345.54 0.00 2.70 0.00 16.00 3.98 11.48 2.87 99.21
dm-14 0.00 0.00 336.63 0.00 2.63 0.00 16.00 3.92 11.61 2.92 98.42
dm-13 0.00 0.00 352.00 0.00 2.75 0.00 16.00 3.96 11.23 2.83 99.50
dm-14 0.00 0.00 344.00 0.00 2.69 0.00 16.00 3.98 11.62 2.89 99.30
dm-13 0.00 0.00 179.00 0.00 89.50 0.00 1024.00 3.74 20.88 5.20 93.13
dm-14 0.00 0.00 189.60 0.00 94.80 0.00 1024.00 3.84 20.27 4.96 94.07
dm-13 0.00 0.00 188.20 0.00 94.10 0.00 1024.00 3.84 20.42 4.98 93.68
dm-14 0.00 0.00 185.20 0.00 92.60 0.00 1024.00 3.75 20.27 5.01 92.79
dm-13 0.00 0.00 180.00 0.00 90.00 0.00 1024.00 3.70 20.55 5.07 91.17
dm-13 0.00 0.00 441.40 0.00 3.45 0.00 16.00 5.13 11.62 2.26 99.91
dm-14 0.00 0.00 415.20 0.00 3.24 0.00 16.00 4.82 11.60 2.41 99.92
dm-13 0.00 0.00 422.70 0.00 3.30 0.00 16.00 4.93 11.66 2.36 99.89
dm-14 0.00 0.00 424.80 0.00 3.32 0.00 16.00 5.02 11.81 2.35 99.83
dm-13 0.00 0.00 426.80 0.00 3.33 0.00 16.00 4.99 11.69 2.34 99.92
dm-14 0.00 0.00 419.90 0.00 3.28 0.00 16.00 4.96 11.80 2.38 100.00
rrqm/s: 每秒进行 merge 的读操作数目。即 delta(rmerge)/s
wrqm/s: 每秒进行 merge 的写操作数目。即 delta(wmerge)/s
r/s: 每秒完成的读 I/O 设备次数。即 delta(rio)/s
w/s: 每秒完成的写 I/O 设备次数。即 delta(wio)/s
rsec/s: 每秒读扇区数。即 delta(rsect)/s
wsec/s: 每秒写扇区数。即 delta(wsect)/s
rkB/s: 每秒读K字节数。是 rsect/s 的一半，因为每扇区大小为512字节。
wkB/s: 每秒写K字节数。是 wsect/s 的一半。
avgrq-sz: 平均每次设备I/O操作的数据大小 (扇区)。即 delta(rsect+wsect)/delta(rio+wio)
avgqu-sz: 平均I/O队列长度。即 delta(aveq)/s/1000 (因为aveq的单位为毫秒)。
await: 平均每次设备I/O操作的等待时间 (毫秒)。即 delta(ruse+wuse)/delta(rio+wio)
svctm: 平均每次设备I/O操作的服务时间 (毫秒)。即 delta(use)/delta(rio+wio)
％util: 一秒中有百分之多少的时间用于 I/O 操作，或者说一秒中有多少时间 I/O 队列是非空的。
即 delta(use)/s/1000 (因为use的单位为毫秒
备注：
IO的映射可以通过如下命令获得。mpath8即为dm-14
multipath -ll
mpath8 (360050768018086462800000000000055) dm-14 IBM,2145
[size=500G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=100][active]
\_ 9:0:0:9 sdak 66:64 [active][ready]
\_ 8:0:0:9 sdk 8:160 [active][ready]
\_ round-robin 0 [prio=20][enabled]
\_ 9:0:1:9 sdax 67:16 [active][ready]
\_ 8:0:1:9 sdx 65:112 [active][ready]
mpath7 (360050768018086462800000000000054) dm-13 IBM,2145
[size=500G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=100][active]
\_ 9:0:1:8 sdaw 67:0 [active][ready]
\_ 8:0:1:8 sdw 65:96 [active][ready]
\_ round-robin 0 [prio=20][enabled]
\_ 9:0:0:8 sdaj 66:48 [active][ready]
\_ 8:0:0:8 sdj 8:144 [active][ready]
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