Copy a single file using parallel IO optimally using multiple sources and/or multiple targets.
- Multithreaded read and write
- User control over block size
- User control over the amount of data copies
- Sparse file support
- Sync IO support (O_SYNC). The default is the standard async IO.
- Support for multiple mounts (file views) of the same file. This is useful when reading or writing to a multi-head file server
- Support from reading from/to a pipe
- TAR filter support - get the source/target file details via ENV (see tar)
- Background mode - move the process to background before doing IO (but after creating it)
- gsutil style loggin
Note that pcp always copies a single file, all sources and/or targets are assumed to be the same file (but using different mounts, etc.).
make
- test: show files, libraries, headers, etc.
- pcp32: build 32 bit version. The default for 64 systems is 64 bit build.
- clean: remove all build outputs
Usage: ./pcp [-b <blocksize> -m <octal mode> -f -d -s] <src file> <dest file>
Usage: ./pcp [-b <blocksize> -m <octal mode> -f -d -s] <src file1> <src file2> < src file-n> -- <dest file1> <dest file2> <dest file n>
Usage: ./pcp -T
-h Print the usage screen (this screen).
-b <blocksize> IO blocksize to use [ 1 - 1048576 ], prefixes bKMGT are supported. Default 65536.
-l <length> Max bytes to read from source. prefixes bKMGT are supported. Default 0 = all file.
-d Increase debug level. Default 1.
-f Force - allow destination file overwrite. Default - fail if destination file exists.
-m <octal mode> destination file mode if created. Default <source> mode.
-t <threads_num> Number of threads to use [1-256]. Default 16.
-S Sparse file support. Default NO.
-s Sync IO mode. Default async.
-v Print version and exit.
-C Create/Open the file on first mount, but do the IOs on other mounts. Relevant only if -M is used. Default NO.
-L <logfile> Log the operation in the specified file, mimicking gsutil cp -L.
-T Tar mode. No args are provides, real args are read from env (see tar --to-command section)
-X <threads> Max system threads. This is set by the first process to create the sys md file (see -M). Default: 64
-M <mdfile> System MD file. This file is used to coordinate the concurrent running threads.
The first process creates it and the other attach them self to it.
-P <mdfile> Peek into a system MD file - show the free threads and exit.
-a Async (background) mode. The process moves itself to background before doing IO.
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