mdtest测试工具

软件介绍

mdstest是软件的元数据操作基准测试工具,用来模拟对文件或者目录的open、stat、close操作,然后报告性能

下载软件压缩包:

yum install openmpi openmpi-devel -y
在/root/.bashrc中添加(注意也要添加mdtest的路径)
export PATH=$PATH:/usr/lib64/openmpi/bin/

source /root/.bashrc
下载
[root@lab8105 ~]# wget http://sourceforge.net/projects/mdtest/files/latest/download
解压
[root@lab8105 ~]# tar -xvf mdtest-1.9.3.tgz
修改makefile:
mdtest: mdtest.c
mpicc -Wall -D $(OS) $(LARGE_FILE) $(MDTEST_FLAGS) -g -o mdtest mdtest.c -lm

参数如下:

Usage:  mdtest [-b #] [-B] [-c] [-C] [-d testdir] [-D] [-e] [-E] [-f first] [-F]
               [-h] [-i iterations] [-I #] [-l last] [-L] [-n #] [-N #] [-p seconds]
               [-r] [-R[#]] [-s #] [-S] [-t] [-T] [-u] [-v] [-V #] [-w #] [-y]
               [-z #]

    -b: branching factor of hierarchical directory structure
		目录树的分支参数
    -B: no barriers between phases (create/stat/remove)
		 不同的阶段没有隔离 (create/stat/remove);
    -c: collective creates: task 0 does all creates and deletes
		共同创建: task 0 完成所有的创建和删除工作;
    -C: only create files/dirs
		只创建文件或目录,不作删除;
    -d: the directory in which the tests will run
		指出测试运行的目录(若不指定,则默认当前目录);
    -D: perform test on directories only (no files)
		只对目录操作进行测试(不包括文件);
    -e: number of bytes to read from each file
		从每个文件读出的文件大小
    -E: only read files
		只读取文件
    -f: first number of tasks on which the test will run
		首先运行的任务号;
    -F: perform test on files only (no directories)
		只创建文件,没有目录;
    -h: prints help message
		输出帮助信息
    -i: number of iterations the test will run
		测试迭代循环次数;
    -I: number of items per tree node
		每个树节点包含的项目
    -l: last number of tasks on which the test will run
		最后运行的任务号
    -L: files/dirs created only at leaf level
		只在目录树的“叶子”层创建文件/目录;
    -n: every task will create/stat/remove # files/dirs per tree
		每个任务需要再每棵树中create/stat/remove的文件/目录数;
    -N: stride # between neighbor tasks for file/dir stat (local=0)
		遍历时指定和相邻任务的跨度
    -p: pre-iteration delay (in seconds)
		每次迭代之间延时(以秒计算)
    -r: only remove files/dirs
		 删除文件/目录
    -R: randomly stat files/dirs (optional seed can be provided)
		随机遍历文件/目录 ;
    -s: stride between the number of tasks for each test
		每次测试的任务数的跨度
    -S: shared file access (file only, no directories)
		共享文件访问(只针对文件操作);
    -t: time unique working directory overhead
		记录特定目录的时间开销
    -T: only stat files/dirs
		
    -u: unique working directory for each task
		为每个任务指定工作目录;
    -v: verbosity (each instance of option increments by one)
		
    -V: verbosity value
    -w: number of bytes to write to each file
		 写到每个文件的字节数
    -y: sync file after write completion
		 再写执行完后同步文件到磁盘(同步写)
    -z: depth of hierarchical directory structure
		目录树的深度;

NOTES:
 * -N allows a "read-your-neighbor" approach by setting stride to
    tasks-per-node. Do not use it with -B, as it creates race conditions.
	允许"read-your-neighbor" 方法
 * -d allows multiple paths for the form '-d fullpath1@fullpath2@fullpath3'
      可以指定多个测试路径,'-d fullpath1@fullpath2@fullpath3'
 * -B allows each task to time itself. The aggregate results reflect this
    change.
	允许每个任务对自己进行计时;
 * -n and -I cannot be used together.  -I specifies the number of files/dirs
   created per tree node, whereas the -n specifies the total number of
   files/dirs created over an entire tree.  When using -n, integer division is
   used to determine the number of files/dirs per tree node.  (E.g. if -n is
   10 and there are 4 tree nodes (z=1 and b=3), there will be 2 files/dirs per
   tree node.)
	
	 * -R and -T can be used separately.  -R merely indicates that if files/dirs
   are going to be stat'ed, then they will be stat'ed randomly.
   不能同时使用,因为指定了每个树节点的文件/目录数量,而-I指定的是整棵树的文件/目录数量。

Illustration of terminology:

                     Hierarchical directory structure (tree)

                                   =======
                                  |       |  (tree node)
                                   =======
                                  /   |   \
                            ------    |    ------
                           /          |          \
                       =======     =======     =======
                      |       |   |       |   |       |    (leaf level)
                       =======     =======     =======

    In this example, the tree has a depth of one (z=1) and branching factor of
    three (b=3).  The node at the top of the tree is the root node.  The level
    of nodes furthest from the root is the leaf level.  All trees created by
    mdtest are balanced.
	这个例子中,目录树深度为1(z=1),每个节点分支为3(b=3).最上面的节点为根节点,

关于openmpi的软件的使用

openmpi是并行的运行程序,配置的时候需要注意下

增加并行的运行节点
[root@lab8105 ~]# vim /etc/openmpi-x86_64/openmpi-default-hostfile
添加
lab8105 slots=1
lab8106 slots=1
特别注意加slots 这个是配置权重的,如果不配置,第一条有默认权重,就无法在数目小时进行均衡操作
检查是否配置成功,np为操作线程数
[root@lab8105 ~]# mpirun  --allow-run-as-root -np 2 hostname
lab8105
lab8106
如果想单机执行多进程,可以用-host指定主机
[root@lab8105 ~]# mpirun -host lab8105  --allow-run-as-root -np 2 hostname

单机下多进程测试

2 task on 1 node
[root@lab8105 ~]# mpirun -host lab8105  --allow-run-as-root -np 2 mdtest -I 10  -z 5 -b 2 -d /mnt/zptest/ -t -c 2
-- started at 01/27/2015 21:06:23 --

mdtest-1.9.3 was launched with 2 total task(s) on 1 node(s)
Command line used: mdtest -I 10 -z 5 -b 2 -d /mnt/zptest/ -t -c 2
Path: /mnt/zptest
FS: 6.5 TiB   Used FS: 59.2%   Inodes: 0.6 Mi   Used Inodes: 100.0%

2 tasks, 1260 files/directories

SUMMARY: (of 1 iterations)
   Operation                      Max            Min           Mean        Std Dev
   ---------                      ---            ---           ----        -------
   Directory creation:        312.088        312.088        312.088          0.000
   Directory stat    :      73447.245      73447.245      73447.245          0.000
   Directory removal :        255.755        255.755        255.755          0.000
   File creation     :        638.824        638.824        638.824          0.000
   File stat         :      86747.366      86747.366      86747.366          0.000
   File read         :      84434.232      84434.232      84434.232          0.000
   File removal      :        207.545        207.545        207.545          0.000
   Tree creation     :         39.062         39.062         39.062          0.000
   Tree removal      :         46.971         46.971         46.971          0.000

-- finished at 01/27/2015 21:06:43 --

多机并发测试

如下显示的2 task on 2 node

[root@lab8105 ~]#  mpirun  --allow-run-as-root -np 2 mdtest -I 10  -z 5 -b 2 -d /mnt/zptest/ -t -c 2
-- started at 01/27/2015 21:04:35 --

mdtest-1.9.3 was launched with 2 total task(s) on 2 node(s)
Command line used: mdtest -I 10 -z 5 -b 2 -d /mnt/zptest/ -t -c 2
Path: /mnt/zptest
FS: 6.5 TiB   Used FS: 59.2%   Inodes: 0.6 Mi   Used Inodes: 100.0%

2 tasks, 1260 files/directories

SUMMARY: (of 1 iterations)
   Operation                      Max            Min           Mean        Std Dev
   ---------                      ---            ---           ----        -------
   Directory creation:        312.355        312.355        312.355          0.000
   Directory stat    :       1611.000       1611.000       1611.000          0.000
   Directory removal :        127.333        127.333        127.333          0.000
   File creation     :        309.295        309.295        309.295          0.000
   File stat         :     113257.534     113257.534     113257.534          0.000
   File read         :     203458.057     203458.057     203458.057          0.000
   File removal      :         98.523         98.523         98.523          0.000
   Tree creation     :         36.566         36.566         36.566          0.000
   Tree removal      :         20.191         20.191         20.191          0.000

-- finished at 01/27/2015 21:05:12 --

关于目录生成的问题:
这个是 -z 2 -b 3

[root@lab8106 mnt]# ls mdtest2/#test-dir.0/mdtest_tree.0/
mdtest_tree.1 mdtest_tree.2 mdtest_tree.3
[root@lab8106 mnt]# ls mdtest2/#test-dir.0/mdtest_tree.0/mdtest_tree.1/
mdtest_tree.4 mdtest_tree.5 mdtest_tree.6

这个是以这个目录开始的

[root@lab8106 mnt]# ls mdtest2/#test-dir.0/mdtest_tree.0/