-<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>dbench</title><meta name="generator" content="DocBook XSL Stylesheets V1.73.2"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry" lang="en"><a name="dbench.1"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>dbench — a benchmark tool</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="cmdsynopsis"><p><code class="command">dbench [OPTIONS] <num-procs></code> </p></div><div class="cmdsynopsis"><p><code class="command">dbench</code> [-B --backend=<dbench backend>] [-c --loadfile=<filename>] [-D --directory=<string>] [-F --fsync] [-R --target-rate=<double>] [-s --sync] [-S --sync-dir] [-t --timelimit=<integer>] [-T --tcp-options=<string>] [--run-once] [--fake-io] [--scsi=<scsi-device>] [--server=<hostname>] [--export=<string>] [--protocol=<string>] [--clients-per-process=<integer>] [--trunc-io=<integer>] [--stat-check] [--skip-cleanup] [--per-client-results] [--iscsi-portal=<ip-address>] [--iscsi-
target=<iqn name>] [--iscsi-lun=<LUN>] [-? --help] [--usage]</p></div></div><div class="refsect1" lang="en"><a name="id2479666"></a><h2>DESCRIPTION</h2><p>
+<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>dbench</title><meta name="generator" content="DocBook XSL Stylesheets V1.73.2"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry" lang="en"><a name="dbench.1"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>dbench — a benchmark tool</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="cmdsynopsis"><p><code class="command">dbench [OPTIONS] <num-procs></code> </p></div><div class="cmdsynopsis"><p><code class="command">dbench</code> [-B --backend=<dbench backend>] [-c --loadfile=<filename>] [-D --directory=<string>] [-F --fsync] [-R --target-rate=<double>] [-s --sync] [-S --sync-dir] [-t --timelimit=<integer>] [-T --tcp-options=<string>] [--run-once] [--fake-io] [--scsi=<scsi-device>] [--server=<hostname>] [--export=<string>] [--protocol=<string>] [--clients-per-process=<integer>] [--trunc-io=<integer>] [--stat-check] [--skip-cleanup] [--per-client-results] [--iscsi-portal=<ip-address>] [--iscsi-
port=<port>] [--iscsi-target=<iqn name>] [--iscsi-lun=<LUN>] [-? --help] [--usage]</p></div></div><div class="refsect1" lang="en"><a name="id2479674"></a><h2>DESCRIPTION</h2><p>
dbench is a utility to benchmark a system based on client workload
profiles.
- </p></div><div class="refsect1" lang="en"><a name="id24796
77"></a><h2>STANDARD OPTIONS</h2><div class="refsect2" lang="en"><a name="id2479683"></a><h3>-B --backend=<dbench backend></h3><p>
+ </p></div><div class="refsect1" lang="en"><a name="id24796
85"></a><h2>STANDARD OPTIONS</h2><div class="refsect2" lang="en"><a name="id2479691"></a><h3>-B --backend=<dbench backend></h3><p>
The backend type specifies which kind of commandset and what kind of
tests that dbench will perform. The backend type specifies which
kind of loadfile that can be used.
</p><p>
There are currently five types of backends : "fileio", "sockio", "nfs", "scsi"and "iscsi". The default is "fileio" which uses a CIFS style loadfile.
- </p></div><div class="refsect2" lang="en"><a name="id247970
1"></a><h3>-c --loadfile=<filename></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id247970
9"></a><h3>-c --loadfile=<filename></h3><p>
This specifies the name of the loadfile to use. The loadfile describes
the sequence and timing of operations that dbench will issue.
- </p></div><div class="refsect2" lang="en"><a name="id24797
13"></a><h3>-D --directory=<string></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id24797
21"></a><h3>-D --directory=<string></h3><p>
This controls which directory that dbench will use as the root for when
running the loadfile. This defaults to "." which refers to the current
directory for the "fileio" and "sockio" backends and the root of the
export for the "nfs" backend.
- </p></div><div class="refsect2" lang="en"><a name="id24797
27"></a><h3>-R --target-rate=<double></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id24797
35"></a><h3>-R --target-rate=<double></h3><p>
By default dbench will try to replay the loadfile and keep the same
rate as the original application the loadfile was captured from.
Using this option it is possible to run the load file faster/slower
</p><p>
By setting this limit to something very large, such as 999999.99 you can
effectively tell dbench to "run this loadfile as fast as possible".
- </p></div><div class="refsect2" lang="en"><a name="id24797
57"></a><h3>-t --timelimit=<integer></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id24797
65"></a><h3>-t --timelimit=<integer></h3><p>
How long to run the test for.
- </p></div><div class="refsect2" lang="en"><a name="id24797
66"></a><h3>--run-once</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id24797
74"></a><h3>--run-once</h3><p>
Only run the loadfile once and stop when the end of the loadfile is
reached.
</p><p>
The default for dbench is to wrap the loadfile when the end is
reached and continue running the loadfile over and over until the
timelimit is reached.
- </p></div><div class="refsect2" lang="en"><a name="id24797
83"></a><h3>--clients-per-process=<integer></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id24797
91"></a><h3>--clients-per-process=<integer></h3><p>
By default dbench will fork one child process for each client emulated.
Using this option dbench will run multiple emulated clients inside
each process.
This is useful for testing how performance differs between the case
of n processes with one thread of I/O each and one process with n threads
of I/O.
- </p></div><div class="refsect2" lang="en"><a name="id24798
01"></a><h3>--skip-cleanup</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id24798
10"></a><h3>--skip-cleanup</h3><p>
Do not cleanup and delete all temporary files in the clients work
directory when the test ends.
- </p></div><div class="refsect2" lang="en"><a name="id24798
12"></a><h3>--per-client-results</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id24798
20"></a><h3>--per-client-results</h3><p>
When the test is finished print a latency report for each inidvidual
client in addition to the aggregated report over all clients.
- </p></div></div><div class="refsect1" lang="en"><a name="id24798
25"></a><h2>FILEIO OPTIONS</h2><div class="refsect2" lang="en"><a name="id2479830"></a><h3>-F --fsync</h3><p>
+ </p></div></div><div class="refsect1" lang="en"><a name="id24798
33"></a><h2>FILEIO OPTIONS</h2><div class="refsect2" lang="en"><a name="id2528486"></a><h3>-F --fsync</h3><p>
This option only apply to the "fileio" backend.
</p><p>
This will make dbench perform a fsync() to the file after each write
operation.
- </p></div><div class="refsect2" lang="en"><a name="id2528
493"></a><h3>-s --sync-open</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id2528
500"></a><h3>-s --sync-open</h3><p>
This option only apply to the "fileio" backend.
</p><p>
This makes dbench override the loadfile and use O_SYNC for all
file open operations.
- </p></div><div class="refsect2" lang="en"><a name="id25285
08"></a><h3>-S --sync-dir</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id25285
16"></a><h3>-S --sync-dir</h3><p>
This option only apply to the "fileio" backend.
</p><p>
Call fsync() on the directory after each "unlink", "rmdir" or "rename"
operation. This emulates how the linux kernel nfs daemon syncs
directories after performing directory modifying operations.
- </p></div><div class="refsect2" lang="en"><a name="id25285
25"></a><h3>--fake-io</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id25285
33"></a><h3>--fake-io</h3><p>
This option only apply to the "fileio" backend.
</p><p>
Do not do any file read/write operations at all.
- </p></div><div class="refsect2" lang="en"><a name="id252854
0"></a><h3>--stat-check</h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id252854
7"></a><h3>--stat-check</h3><p>
This option only apply to the "fileio" backend.
</p><p>
After each create/mkdir/rmdir/rename operation, immediately try to
is correct. I.e. Verify that immediately after we have created an
object that stat() will succeed and that immediately after we have
deleted an object that stat() will fail.
- </p></div></div><div class="refsect1" lang="en"><a name="id252856
0"></a><h2>SOCKIO OPTIONS</h2><div class="refsect2" lang="en"><a name="id2528566"></a><h3>-T --tcp-options=<string></h3><p>
+ </p></div></div><div class="refsect1" lang="en"><a name="id252856
8"></a><h2>SOCKIO OPTIONS</h2><div class="refsect2" lang="en"><a name="id2528573"></a><h3>-T --tcp-options=<string></h3><p>
This option only apply to the "sockio" backend.
- </p></div></div><div class="refsect1" lang="en"><a name="id25285
77"></a><h2>NFS OPTIONS</h2><div class="refsect2" lang="en"><a name="id2528583"></a><h3>--server=<hostname></h3><p>
+ </p></div></div><div class="refsect1" lang="en"><a name="id25285
85"></a><h2>NFS OPTIONS</h2><div class="refsect2" lang="en"><a name="id2528591"></a><h3>--server=<hostname></h3><p>
This option only apply to the "nfs" backend.
</p><p>
This option is mandatory when the "nfs" backend is used.
</p><p>
This specifies the host-name or ip-address of the server to test.
- </p></div><div class="refsect2" lang="en"><a name="id25286
02"></a><h3>--export=<string></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id25286
10"></a><h3>--export=<string></h3><p>
This option only apply to the "nfs" backend.
</p><p>
This option is mandatory when the "nfs" backend is used.
</p><p>
This specifies the nfs-export on the server to do i/o to.
- </p></div><div class="refsect2" lang="en"><a name="id252862
1"></a><h3>--protocol=<string></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id252862
9"></a><h3>--protocol=<string></h3><p>
This option only apply to the "nfs" backend.
</p><p>
This specifies whether "tcp" or "udp" is to be used. Default is "tcp".
- </p></div><div class="refsect2" lang="en"><a name="id25286
36"></a><h3>--trunc-io=<integer></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id25286
44"></a><h3>--trunc-io=<integer></h3><p>
This option only apply to the "nfs" backend.
</p><p>
Some NFS server may have limitations on how large READ/WRITE I/Os they
accept preventing some loadfiles from running. Using this option will
override the length specified in the loadfile and make dbench never
issuing any READ/WRITE operations larger than this.
- </p></div></div><div class="refsect1" lang="en"><a name="id25286
56"></a><h2>SCSI OPTIONS</h2><div class="refsect2" lang="en"><a name="id2528662"></a><h3>--scsi=<scsi-device></h3><p>
+ </p></div></div><div class="refsect1" lang="en"><a name="id25286
64"></a><h2>SCSI OPTIONS</h2><div class="refsect2" lang="en"><a name="id2528669"></a><h3>--scsi=<scsi-device></h3><p>
This option only apply to the "scsi" backend.
</p><p>
This option is mandatory when the "scsi" backend is used.
</p><p>
This specifies the device node of the scsi-device we want to run the loadfile on. Example: --scsi=/dev/sda
- </p></div></div><div class="refsect1" lang="en"><a name="id25286
83"></a><h2>iSCSI OPTIONS</h2><p>
+ </p></div></div><div class="refsect1" lang="en"><a name="id25286
91"></a><h2>iSCSI OPTIONS</h2><p>
Dbench contains a primitive iSCSI initiator, allowing it to perform I/O
to some iSCSI targets.
- </p><div class="refsect2" lang="en"><a name="id2528
694"></a><h3>--iscsi-portal=<ip-address></h3><p>
+ </p><div class="refsect2" lang="en"><a name="id2528
702"></a><h3>--iscsi-portal=<ip-address></h3><p>
This option only apply to the "iscsi" backend.
</p><p>
This option is mandatory when the "iscsi" backend is used.
</p><p>
This specifies the host-name or ip-address of the target to test.
- </p></div><div class="refsect2" lang="en"><a name="id2528714"></a><h3>--iscsi-target=<iqn name></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id2528721"></a><h3>--iscsi-port=<tcp port></h3><p>
+ This option only apply to the "iscsi" backend.
+ </p><p>
+ This option is optional when the "iscsi" backend is used.
+ If not used the tcp port defaults to 3260.
+ </p><p>
+ This specifies the tcp port to connect to on the target.
+ </p></div><div class="refsect2" lang="en"><a name="id2528742"></a><h3>--iscsi-target=<iqn name></h3><p>
This option only apply to the "iscsi" backend.
</p><p>
This option is mandatory when the "iscsi" backend is used.
</p><p>
This specifies the iscsi iqn name of the target to test.
- </p></div><div class="refsect2" lang="en"><a name="id25287
33"></a><h3>--iscsi-lun=<LUN></h3><p>
+ </p></div><div class="refsect2" lang="en"><a name="id25287
61"></a><h3>--iscsi-lun=<LUN></h3><p>
This option only apply to the "iscsi" backend.
</p><p>
This option is mandatory when the "iscsi" backend is used.
</p><p>
This specifies the LUN of the target to test.
- </p></div></div><div class="refsect1" lang="en"><a name="id25287
53"></a><h2>COPYRIGHT/LICENSE</h2><div class="literallayout"><p><br>
+ </p></div></div><div class="refsect1" lang="en"><a name="id25287
81"></a><h2>COPYRIGHT/LICENSE</h2><div class="literallayout"><p><br>
Copyright (C) Andrew Tridgell 2008<br>
Copyright (C) Ronnie Sahlberg 2008<br>
<br>
git.samba.org / tridge / dbench.git / commitdiff