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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>gfpcopy</title>
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry">
<a name="gfpcopy.1"></a><div class="titlepage"></div>
<div class="refnamediv">
<a name="name"></a><h2>Name</h2>
<p>gfpcopy — copy Gfarm files in parallel</p>
</div>
<div class="refsynopsisdiv">
<a name="synopsis"></a><h2>Synopsis</h2>
<div class="cmdsynopsis"><p><code class="command">gfpcopy</code> [-nqvdpPU] [-X <em class="replaceable"><code>regexp</code></em>] [-S <em class="replaceable"><code>source-domainname</code></em>] [-h <em class="replaceable"><code>source-hostfile</code></em>] [-D <em class="replaceable"><code>destination-domainname</code></em>] [-H <em class="replaceable"><code>destination-hostfile</code></em>] [-j <em class="replaceable"><code>num-of-processes</code></em>] [-J <em class="replaceable"><code>num-of-processes</code></em>] [-M <em class="replaceable"><code>limit-byte</code></em>] [-z <em class="replaceable"><code>minimum-byte</code></em>] [-Z <em class="replaceable"><code>maximum-byte</code></em>] [-w <em class="replaceable"><code>way-of-scheduling</code></em>] [-W <em class="replaceable"><code>kilobytes-for-threshold</code></em>] [-s <em class="replaceable"><code>KB/s-to-simulate</code></em>] [-F <em class="replaceable"><code>num-for-readahead</code></em>] [-b <em class="replaceable"><code>bufsize</code></em>] [-f] [-e] [-k] <em class="replaceable"><code>source-path</code></em> <em class="replaceable"><code>destination-path</code></em> </p></div>
</div>
<div class="refsect1">
<a name="description"></a><h2>DESCRIPTION</h2>
<p>
<span class="command"><strong>gfpcopy</strong></span> copies files in parallel.
</p>
<p>
When the <em class="parameter"><code>source-path</code></em> is
a directory, files under the directory will be copied recursively.
</p>
<p>
When the <em class="parameter"><code>destination-path</code></em> does
not exist, the directory is created.
When the <em class="parameter"><code>destination-path</code></em>
exists, a directory of the same name as
the <em class="parameter"><code>source-path</code></em> is created
under the <em class="parameter"><code>destination-path</code></em>.
</p>
<p>
A set of source/destination hosts can be specified by a domain name
and/or a hostlist file. When both a domain name and a hostlist file
are specified, a set of hosts is determined by both conditions. When a
set of source hosts is specified, only files stored on the source
hosts are copied.
</p>
<p>
<span class="command"><strong>gfpcopy</strong></span> also retrieves the directory
entries in parallel.
</p>
</div>
<div class="refsect1">
<a name="source-path"></a><h2>SOURCE PATH</h2>
<p>
<em class="parameter"><code>source-path</code></em> must be one of the following formats.
Files on HPSS cannot be copied.
</p>
<div class="variablelist"><dl class="variablelist">
<dt><span class="term"><em class="parameter"><code>path-name</code></em></span></dt>
<dd><p>
is a relative path or an absolute path of a local file system. When the path
is a mount point on gfarm2fs, files are copied without passing through
the gfarm2fs.
</p></dd>
<dt><span class="term"><em class="parameter"><code>gfarm:...</code></em></span></dt>
<dd><p>
is a Gfarm URL.
</p></dd>
<dt><span class="term"><em class="parameter"><code>file:...</code></em></span></dt>
<dd><p>
is an URL of a local file system.
</p></dd>
</dl></div>
</div>
<div class="refsect1">
<a name="source-path"></a><h2>DESTINATION PATH</h2>
<p>
<em class="parameter"><code>destination-path</code></em>
must be one of the following formats.
</p>
<div class="variablelist"><dl class="variablelist">
<dt><span class="term"><em class="parameter"><code>path-name</code></em></span></dt>
<dd><p>
is a relative path or an absolute path of a local file system. When the path
is a mount point on gfarm2fs, files are copied without passing through
the gfarm2fs.
</p></dd>
<dt><span class="term"><em class="parameter"><code>gfarm:...</code></em></span></dt>
<dd><p>
is a Gfarm URL of a directory.
</p></dd>
<dt><span class="term"><em class="parameter"><code>file:...</code></em></span></dt>
<dd><p>
is an URL of a directory on a local file system.
</p></dd>
<dt><span class="term"><em class="parameter"><code>hpss:...</code></em></span></dt>
<dd><p>
is an URL of a directory on HPSS.
If the same directory as
the <em class="parameter"><code>source-path</code></em> exists under
this directory, the <em class="parameter"><code>source-path</code></em>
cannot be copied.
The differential copy is not supported for HPSS.
Relative path such as "hpss:". and "hpss:dir" can be specified.
</p></dd>
</dl></div>
</div>
<div class="refsect1">
<a name="options"></a><h2>GFPCOPY OPTIONS</h2>
<p>
These are options only for <span class="command"><strong>gfpcopy</strong></span>.
</p>
<div class="variablelist"><dl class="variablelist">
<dt><span class="term"><code class="option">-b</code> <em class="parameter"><code>bufsize</code></em></span></dt>
<dd>
<p>
Specifies the buffer size in bytes to copy.
</p>
<p>
The default value is 64 KiB (64 * 1024).
</p>
</dd>
<dt><span class="term"><code class="option">-f</code></span></dt>
<dd>
<p>
With the -f option, existing files will be overwritten when
the size is different or the modification time (mtime) is different from the
source file.
</p>
<p>
Without the -f option, existing files will be overwritten when
they are older than the corresponding source files in the
modification time.
</p>
</dd>
<dt><span class="term"><code class="option">-e</code></span></dt>
<dd><p>
Skips existing files in order to execute gfpcopy
simultaneously.
</p></dd>
<dt><span class="term"><code class="option">-k</code></span></dt>
<dd><p>
Does not copy symbolic links.
</p></dd>
</dl></div>
</div>
<div class="refsect1">
<a name="common-options"></a><h2>COMMON OPTIONS</h2>
<p>
The following options are common options
for <span class="command"><strong>gfprep</strong></span>
and <span class="command"><strong>gfpcopy</strong></span>.
</p>
<div class="variablelist"><dl class="variablelist">
<dt><span class="term"><code class="option">-X</code> <em class="parameter"><code>regexp</code></em></span></dt>
<dd><p>
Skips files matched by the pattern
of <em class="parameter"><code>regexp</code></em>. When multiple
patterns need to be specified, specify -X options multiple times.
</p></dd>
<dt><span class="term"><code class="option">-S</code> <em class="parameter"><code>source-domainname</code></em></span></dt>
<dd><p>
Creates file replicas or copies files only stored on the hosts in the
specified domain name.
</p></dd>
<dt><span class="term"><code class="option">-h</code> <em class="parameter"><code>source-hostfile</code></em></span></dt>
<dd>
<p>
Creates file replicas or copies files only stored on the hosts listed
in the specified hostfile.
The <em class="parameter"><code>source-hostfile</code></em> consists of
a file system node name on each line.
</p>
<p>
If ``-'' is specified, standard input is used to read the host list.</p>
</dd>
<dt><span class="term"><code class="option">-L</code></span></dt>
<dd><p>
Creates file replicas or copies files from the hosts specified by the
-S or -h option.
</p></dd>
<dt><span class="term"><code class="option">-D</code> <em class="parameter"><code>destination-domainname</code></em></span></dt>
<dd>
<p>
Specifies the domain name for destination.
</p>
<p>
If neither this nor the <code class="option">-H</code> option is specified,
replicas may be copied to any available host.
</p>
</dd>
<dt><span class="term"><code class="option">-H</code> <em class="parameter"><code>destination-hostfile</code></em></span></dt>
<dd>
<p>
Specifies a file which describes hostnames for destination.
The <em class="parameter"><code>destination-hostfile</code></em>
consists of a file system node name on each line.
</p>
<p>
If ``-'' is specified, standard input is used to read the host list.
</p>
</dd>
<dt><span class="term"><code class="option">-j</code> <em class="parameter"><code>num-of-processes</code></em></span></dt>
<dd>
<p>
Specifies the maximum number of processes to create file replicas (or
copy files) simultaneously.
</p>
<p>
The default value is the parameter of client_parallel_copy in gfarm2.conf.
(see man gfarm2.conf)
</p>
<p>
The maximum number of process per file system node for source or destination
is the number of CPUs (see man <span class="command"><strong>gfhost</strong></span>).
</p>
</dd>
<dt><span class="term"><code class="option">-J</code> <em class="parameter"><code>num-of-processes</code></em></span></dt>
<dd>
<p>
Specifies the number of processes to retrieve directory entries in parallel.
</p>
<p>
The default value is 8.
</p>
</dd>
<dt><span class="term"><code class="option">-M</code> <em class="parameter"><code>total-byte</code></em></span></dt>
<dd>
<p>
Specifies the total file size in bytes to replicate or copy. This
option is useful to increase the available capacity by moving the
specified bytes of files.
</p>
<p>
The default value is unlimited.
</p>
</dd>
<dt><span class="term"><code class="option">-z</code> <em class="parameter"><code>minimum-byte</code></em></span></dt>
<dd>
<p>
Specifies the minimum file size in bytes to replicate or copy. This
option is useful not to replicate or copy small files.
</p>
<p>
The default value is unlimited.
</p>
</dd>
<dt><span class="term"><code class="option">-Z</code> <em class="parameter"><code>maximum-byte</code></em></span></dt>
<dd>
<p>
Specifies the maximum file size in bytes to replicate or copy. This
option is useful not to replicate or copy large files.
</p>
<p>
The default value is unlimited.
</p>
</dd>
<dt><span class="term"><code class="option">-w</code> <em class="parameter"><code>way-of-scheduling</code></em></span></dt>
<dd>
<p>
Specifies a scheduling method.
``noplan'' replicates/copies while finding files.
``greedy'' schedules greedily the order of replication/copy beforehand.
</p>
<p>
The default behavior is ``noplan''.
</p>
<p>
``greedy'' scheduling cannot use with the -N option and -m option.
</p>
</dd>
<dt><span class="term"><code class="option">-W</code> <em class="parameter"><code>kibibytes</code></em></span></dt>
<dd>
<p>
Specifies a threshold size/cost(KiB) to flat costs of Connections.
A Connection means a scheduling information to assign files per a
child-process
</p>
<p>
This option is effective with -w greedy.
</p>
<p>
The default value is 50*1024 KiB (50 MiB).
</p>
</dd>
<dt><span class="term"><code class="option">-I</code> <em class="parameter"><code>sec-to-update</code></em></span></dt>
<dd>
<p>
Specifies the interval in seconds to collect load average and
available capacity.
</p>
<p>
Default is 300 seconds.
</p>
</dd>
<dt><span class="term"><code class="option">-B</code></span></dt>
<dd>
<p>
Gfarm 2.6.16 or later does not select high loaded file system nodes.
This option disables this feature.
</p>
<p>
High loaded node is defined by having more CPU load than schedule_busy_load_thresh * number of CPUs. For details of schedule_busy_load_thresh, refer to a manual page of gfarm2.conf.
</p>
</dd>
<dt><span class="term"><code class="option">-U</code></span></dt>
<dd><p>
Disables checking the available disk space of the selected node every
time.
</p></dd>
<dt><span class="term"><code class="option">-F</code> <em class="parameter"><code>num-of-dirents</code></em></span></dt>
<dd>
<p>
Specifies the number of readahead entries to retrieve the directory
entries.
</p>
<p>
The default value is 10000.
</p>
</dd>
<dt><span class="term"><code class="option">-s</code> <em class="parameter"><code>kilobytes-per-second</code></em></span></dt>
<dd><p>
Specifies a throughput(KB/s) to simulate the replication/copy, and
does nothing (gets file information only).
</p></dd>
<dt><span class="term"><code class="option">-n</code></span></dt>
<dd><p>
Does nothing.
</p></dd>
<dt><span class="term"><code class="option">-p</code></span></dt>
<dd><p>
Reports the total performance information.
</p></dd>
<dt><span class="term"><code class="option">-P</code></span></dt>
<dd><p>
Reports the performance information for each file and all files.
</p></dd>
<dt><span class="term"><code class="option">-q</code></span></dt>
<dd><p>
Suppresses non-error messages.
</p></dd>
<dt><span class="term"><code class="option">-v</code></span></dt>
<dd><p>Displays verbose output.
</p></dd>
<dt><span class="term"><code class="option">-d</code></span></dt>
<dd><p>Displays debug output.
</p></dd>
<dt><span class="term"><code class="option">-?</code></span></dt>
<dd><p>Displays a list of command options.</p></dd>
</dl></div>
</div>
<div class="refsect1">
<a name="examples"></a><h2>EXAMPLES</h2>
<p>
To copy files under the directory recursively.
</p>
<div class="literallayout"><p><br>
$ gfpcopy gfarm:///dir file:///tmp/dir<br>
</p></div>
<div class="literallayout"><p><br>
$ gfpcopy file:///tmp/dir gfarm:///dir<br>
</p></div>
<div class="literallayout"><p><br>
$ gfpcopy gfarm:///dir1 gfarm:///dir2<br>
</p></div>
<div class="literallayout"><p><br>
$ gfpcopy gfarm:///dir hpss:///tmp/dir<br>
</p></div>
<div class="literallayout"><p><br>
$ cd /mnt/gfarm2fs<br>
$ gfpcopy dir /tmp/dir<br>
</p></div>
<p>
To copy a file.
</p>
<div class="literallayout"><p><br>
$ gfpcopy gfarm:///dir/file file:///dir<br>
</p></div>
<div class="literallayout"><p><br>
$ cd /mnt/gfarm2fs<br>
$ gfpcopy file /tmp/dir<br>
</p></div>
</div>
<div class="refsect1">
<a name="notes"></a><h2>NOTES</h2>
<p>
To retrieve the directory entries efficiently, it is better to execute
<span class="command"><strong>gfpcopy</strong></span> command near the metadata
server. When you need to
execute <span class="command"><strong>gfpcopy</strong></span> command far from
the metadata server, increase the parallelism by the -j and -J
options.
</p>
</div>
<div class="refsect1">
<a name="see-also"></a><h2>SEE ALSO</h2>
<p>
<span class="citerefentry"><span class="refentrytitle">gfprep</span>(1)</span>,
<span class="citerefentry"><span class="refentrytitle">gfreg</span>(1)</span>,
<span class="citerefentry"><span class="refentrytitle">gfexport</span>(1)</span>,
<span class="citerefentry"><span class="refentrytitle">gfarm2.conf</span>(5)</span>
</p>
</div>
</div></body>
</html>
|
