mirror of
https://github.com/upa/mscp.git
synced 2026-02-04 03:24:58 +08:00
179 lines
5.8 KiB
Markdown
179 lines
5.8 KiB
Markdown
# mscp: multi-threaded scp
|
|
|
|
[](https://github.com/upa/mscp/actions/workflows/build-ubuntu.yml) [](https://github.com/upa/mscp/actions/workflows/build-macos.yml) [](https://github.com/upa/mscp/actions/workflows/test.yml)
|
|
|
|
|
|
`mscp`, a variant of `scp`, copies files over multiple ssh (SFTP)
|
|
connections. Multiple threads and connections in mscp transfer (1)
|
|
multiple files simultaneously and (2) a large file in parallel. It
|
|
would shorten the waiting time for transferring a lot of/large files
|
|
over networks.
|
|
|
|
You can use `mscp` like `scp`, for example, `mscp
|
|
user@example.com:srcfile /tmp/dstfile`. Remote hosts only need to run
|
|
standard `sshd` supporting the SFTP subsystem (e.g. openssh-server),
|
|
and you need to be able to ssh to the hosts as usual. `mscp` does not
|
|
require anything else.
|
|
|
|
https://user-images.githubusercontent.com/184632/206889149-7cc6178a-6f0f-41e6-855c-d25e15a9abc5.mp4
|
|
|
|
|
|
Differences from `scp` on usage:
|
|
|
|
- remote glob on remote shell expansion is not supported.
|
|
- remote to remote copy is not supported.
|
|
- `-r` option is not needed.
|
|
- and any other differences I have not implemented and noticed.
|
|
|
|
|
|
## Install
|
|
|
|
- homebrew
|
|
|
|
```console
|
|
brew install upa/tap/mscp
|
|
```
|
|
|
|
- Linux
|
|
|
|
Download a package for your environment from [Releases
|
|
page](https://github.com/upa/mscp/releases).
|
|
|
|
|
|
## Build
|
|
|
|
mscp depends on a patched [libssh](https://www.libssh.org/). The
|
|
patch introduces asynchronous SFTP Write, which is derived from
|
|
https://github.com/limes-datentechnik-gmbh/libssh (see [Re: SFTP Write
|
|
async](https://archive.libssh.org/libssh/2020-06/0000004.html)).
|
|
|
|
Currently macOS and Linux (Ubuntu, CentOS, Rocky) are supported.
|
|
|
|
```console
|
|
# clone this repository
|
|
git clone https://github.com/upa/mscp.git
|
|
cd mscp
|
|
|
|
# prepare patched libssh
|
|
git submodule update --init
|
|
patch -d libssh -p1 < patch/libssh-0.10.4.patch
|
|
|
|
# install build dependency
|
|
bash ./scripts/install-build-deps.sh
|
|
|
|
# configure mscp
|
|
mkdir build && cd build
|
|
cmake ..
|
|
|
|
# in macOS, you may need OPENSSL_ROOT_DIR for cmake:
|
|
# cmake .. -DOPENSSL_ROOT_DIR=$(brew --prefix)/opt/openssl@1.1
|
|
|
|
# build
|
|
make
|
|
|
|
# install the mscp binary to CMAKE_INSTALL_PREFIX/bin (usually /usr/local/bin)
|
|
make install
|
|
```
|
|
Source tar balls (`mscp-X.X.X.tar.gz`, not `Source code`) in
|
|
[Releases page](https://github.com/upa/mscp/releases) contains the patched version
|
|
of libssh. So you can start from cmake with it.
|
|
|
|
## Run
|
|
|
|
- Usage
|
|
|
|
```console
|
|
$ mscp
|
|
mscp v0.0.5: copy files over multiple ssh connections
|
|
|
|
Usage: mscp [vqDCHdNh] [-n nr_conns] [-m coremask]
|
|
[-s min_chunk_sz] [-S max_chunk_sz] [-a nr_ahead] [-b buf_sz]
|
|
[-l login_name] [-p port] [-i identity_file]
|
|
[-c cipher_spec] [-M hmac_spec] source ... target
|
|
```
|
|
|
|
- Example: copy a 15GB file on memory over a 100Gbps link
|
|
- Two Intel Xeon Gold 6130 machines directly connected with Intel E810 100Gbps NICs.
|
|
- Default `openssh-server` runs on the remote host.
|
|
|
|
```console
|
|
$ mscp /var/ram/test.img 10.0.0.1:/var/ram/
|
|
[======================================] 100% 15GB/15GB 1.7GB/s 00:00 ETA
|
|
```
|
|
|
|
```console
|
|
# with some optimizations. top speed reaches 3.0GB/s.
|
|
$ mscp -n 5 -m 0x1f -c aes128-gcm@openssh.com /var/ram/test.img 10.0.0.1:/var/ram/
|
|
[======================================] 100% 15GB/15GB 2.4GB/s 00:00 ETA
|
|
```
|
|
|
|
- `-v` option increments verbose output level.
|
|
|
|
```console
|
|
$ mscp test 10.0.0.1:
|
|
[======================================] 100% 26B /26B 6.3KB/s 00:00 ETA
|
|
```
|
|
|
|
```console
|
|
$ mscp -vv test 10.0.0.1:
|
|
number of connections: 7
|
|
connecting to 10.0.0.1 for checking destinations...
|
|
file test/testdir/asdf (local) -> ./test/testdir/asdf (remote) 9B
|
|
file test/testdir/qwer (local) -> ./test/testdir/qwer (remote) 5B
|
|
file test/test1 (local) -> ./test/test1 (remote) 6B
|
|
file test/test2 (local) -> ./test/test2 (remote) 6B
|
|
we have only 4 chunk(s). set number of connections to 4
|
|
connecting to 10.0.0.1 for a copy thread...
|
|
connecting to 10.0.0.1 for a copy thread...
|
|
connecting to 10.0.0.1 for a copy thread...
|
|
copy start: test/test1
|
|
copy start: test/test2
|
|
copy done: test/test1
|
|
copy start: test/testdir/asdf
|
|
copy done: test/test2
|
|
copy start: test/testdir/qwer
|
|
copy done: test/testdir/qwer
|
|
copy done: test/testdir/asdf
|
|
[======================================] 100% 26B /26B 5.2KB/s 00:00 ETA
|
|
```
|
|
|
|
- Full usage
|
|
|
|
```console
|
|
$ mscp -h
|
|
mscp v0.0.6: copy files over multiple ssh connections
|
|
|
|
Usage: mscp [vqDCHdNh] [-n nr_conns] [-m coremask]
|
|
[-s min_chunk_sz] [-S max_chunk_sz] [-a nr_ahead] [-b buf_sz]
|
|
[-l login_name] [-p port] [-i identity_file]
|
|
[-c cipher_spec] [-M hmac_spec] source ... target
|
|
|
|
-n NR_CONNECTIONS number of connections (default: floor(log(cores)*2)+1)
|
|
-m COREMASK hex value to specify cores where threads pinned
|
|
-s MIN_CHUNK_SIZE min chunk size (default: 64MB)
|
|
-S MAX_CHUNK_SIZE max chunk size (default: filesize/nr_conn)
|
|
|
|
-a NR_AHEAD number of inflight SFTP commands (default: 32)
|
|
-b BUF_SZ buffer size for i/o and transfer
|
|
|
|
-v increment verbose output level
|
|
-q disable output
|
|
-D dry run
|
|
-r no effect
|
|
|
|
-l LOGIN_NAME login name
|
|
-p PORT port number
|
|
-i IDENTITY identity file for public key authentication
|
|
-c CIPHER cipher spec
|
|
-M HMAC hmac spec
|
|
-C enable compression on libssh
|
|
-H disable hostkey check
|
|
-d increment ssh debug output level
|
|
-N disable tcp nodelay (default on)
|
|
-h print this help
|
|
```
|
|
|
|
|
|
Note: mscp is still under development, and the author is not
|
|
responsible for any accidents due to mscp.
|