blob: fccdfd841037cb74da4d5af618234dfe712e51dd (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
<?xml version="1.0" encoding="utf-8"?>
<!--
Written by Joey Hess
-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook V4.4//EN"
"file:///usr/share/xml/docbook/schema/dtd/4.4/docbookx.dtd"
[]>
<refentry>
<refentryinfo>
<address>
<email>joey@kitenet.net</email>
</address>
<author>
<firstname>Joey</firstname>
<surname>Hess</surname>
</author>
<date>2009-07-02</date>
</refentryinfo>
<refmeta>
<refentrytitle>parallel</refentrytitle>
<manvolnum>1</manvolnum>
</refmeta>
<refnamediv>
<refname>parallel</refname>
<refpurpose>run programs in parallel</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>parallel</command>
<arg>options</arg>
<arg>command</arg>
<arg>--</arg>
<arg>arguments</arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>DESCRIPTION</title>
<para><command>parallel</command> runs the specified command,
passing it a single one of the specified arguments. This is
repeated for each argument. Jobs may be run in
parallel. The default is to run one job per CPU core.</para>
</refsect1>
<refsect1>
<title>OPTIONS</title>
<variablelist>
<varlistentry>
<term><option>-j maxjobs</option></term>
<listitem>
<para>Use to limit the number of jobs
that are run at the same time.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-l maxload</option></term>
<listitem>
<para>Avoid starting new jobs when
the system's load average is higher
than the specified limit.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-i</option></term>
<listitem>
<para>Normally the command is passed the
argument at the end of its command line. With
this option, the first instance of "{}" in
the command is replaced with the argument.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>EXAMPLE</title>
<para>
<cmdsynopsis>
<command>parallel ufraw -o processed -- *.NEF</command>
</cmdsynopsis>
</para>
<para>This runs one ufraw process per available CPU, until
all of the NEF files have been processed.
</para>
<para>
<cmdsynopsis>
<command>parallel -j 3 ufraw -o processed -- *.NEF</command>
</cmdsynopsis>
</para>
<para>This runs three ufraw processes at the same time until
all of the NEF files have been processed.
</para>
</refsect1>
<refsect1>
<title>EXIT STATUS</title>
<para>Its exit status is the combination of the exit statuses of each
command ran, ORed together. (Thus, if any one command
exists nonzero, <command>parallel</command> as a whole will exit nonzero.)</para>
</refsect1>
</refentry>
|
