orion是oracle提供的测试io性能的工具。它可以用来模拟Oracle数据库IO，也可以用来仿真ASM的条带化的功能。
一、orion概述
1.说明
orion是oracle提供的测试io性能的工具。它可以用来模拟oracle数据库io，也可以用来仿真asm的条带化的功能。
2.orion的优点以及缺点
2.1优势
不需要运行load runner以及配置大量的clinet
不需要运行oracle数据库，以及准备大量的测试数据
测试结果更具有代表性，如随机IO测试中，该软件可以让存储的命中率接近为0，而更仿真出了磁盘的真实的IOPS，而load runner很难做到这些，最终的磁盘IOPS需要换算得到。
可以根据需要定制一定比例的写操作（默认没有写操作），但是需要注意，如果磁盘上有数据，需要小心数据被覆盖掉。
3. 安装
3.1 如果已经安装了oracle database19c 无需重复安装，
/opt/oracle/product/19c/dbhome_1/bin
./orion -help
[oracle@localhost bin]$ ./orion -help
ORION: ORacle IO Numbers -- Version RDBMS_19.3.0.0.0DBRU_LINUX.X64_190417
ORION runs IO performance tests that model Oracle RDBMS IO workloads.
It measures the performance of small (2-32K) IOs and large (128K+) IOs
at various load levels.
Each Orion data point is a test for a specific mix of small and large
IO loads sustained for a duration. An Orion test consists of multiple
data point tests. These data point tests can be represented as a
two-dimensional matrix. Each column in the matrix represents data
point tests with the same small IO load, but varying large IO loads.
Each row represents data point tests with the same large IO load, but
varying small IO loads. An Orion test can be for a single point, a
single row, a single column, or the whole matrix.
The 'run' parameter is the only mandatory parameter. Defaults
are indicated for all other parameters. For additional information on
the user interface, see the Orion User Guide.
<testname> is the prefix used for all input and output filenames. By
default, it is 'orion'. It can be specified with the 'testname'
parameter.
<testname>.lun should contain a carriage-return-separated list of LUNs.
The output files for a test run are prefixed by <testname>_<date> where
date is "yyyymmdd_hhmm".
The output files are:
<testname>_<date>_summary.txt - Summary of the input parameters, along with