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GFPCOPY(1) Gfarm GFPCOPY(1)

NAME

gfpcopy - copy Gfarm files in parallel

SYNOPSIS

gfpcopy [-nqvdpPU] [-X regexp] [-S source-domainname] [-h source-hostfile] [-D destination-domainname] [-H destination-hostfile] [-j num-of-processes] [-J num-of-processes] [-M limit-byte] [-z minimum-byte] [-Z maximum-byte] [-w way-of-scheduling] [-W kilobytes-for-threshold] [-s KB/s-to-simulate] [-F num-for-readahead] [-b bufsize] [-f] [-e] [-k] source-path destination-path

DESCRIPTION

gfpcopy copies files in parallel.

When the source-path is a directory, files under the directory will be copied recursively.

When the destination-path does not exist, the directory is created. When the destination-path exists, a directory of the same name as the source-path is created under the destination-path.

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.

gfpcopy also retrieves the directory entries in parallel.

SOURCE PATH

source-path must be one of the following formats. Files on HPSS cannot be copied.

path-name

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.

gfarm:...

is a Gfarm URL.

file:...

is an URL of a local file system.

DESTINATION PATH

destination-path must be one of the following formats.

path-name

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.

gfarm:...

is a Gfarm URL of a directory.

file:...

is an URL of a directory on a local file system.

hpss:...

is an URL of a directory on HPSS. If the same directory as the source-path exists under this directory, the source-path cannot be copied. The differential copy is not supported for HPSS. Relative path such as "hpss:". and "hpss:dir" can be specified.

GFPCOPY OPTIONS

These are options only for gfpcopy.

-b bufsize

Specifies the buffer size in bytes to copy.

The default value is 64 KiB (64 * 1024).

-f

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.

Without the -f option, existing files will be overwritten when they are older than the corresponding source files in the modification time.

-e

Skips existing files in order to execute gfpcopy simultaneously.

-k

Does not copy symbolic links.

COMMON OPTIONS

There are several common options with gfprep. (see man gfprep)

EXAMPLES

To copy files under the directory recursively.

$ gfpcopy gfarm:///dir file:///tmp/dir

$ gfpcopy file:///tmp/dir gfarm:///dir

$ gfpcopy gfarm:///dir1 gfarm:///dir2

$ gfpcopy gfarm:///dir hpss:///tmp/dir

$ cd /mnt/gfarm2fs
$ gfpcopy dir /tmp/dir

To copy a file.

$ gfpcopy gfarm:///dir/file file:///dir

$ cd /mnt/gfarm2fs
$ gfpcopy file /tmp/dir

NOTES

To retrieve the directory entries efficiently, it is better to execute gfpcopy command near the metadata server. When you need to execute gfpcopy command far from the metadata server, increase the parallelism by the -j and -J options.

SEE ALSO

gfprep(1), gfreg(1), gfexport(1), gfarm2.conf(5)

27 Aug 2015 Gfarm