EScp is an application for high speed data transfer. This version has been tested across the WAN at ~200 gbit/s at SC23, disk-to-disk, limited by NIC. EScp's command line interface is derived from SCP and then extended to provide additional functionality. Some of the features of EScp include:
- Multiple TCP/IP streams per transfer ( 1/thread )
- Lockless multi threaded application
- ZeroCopy (When blocksize < L3), uses shared memory, and page aligned
- AES-GCM 128 over the wire encryption, optimized for performance
- Authentication to remote systems through SSH
- Swappable I/O Engines ( Currently: DUMMY & POSIX )
- Block based interface to transferring data
- Compression (using zstd)
- Checksums, Direct I/O, API's
- Memory/Block Based Transfers (as well as File based transfers)
In general, the approach taken by EScp is to have algorithms optimized to give good performance while providing full-set functionality. This means baseline security (AES-GCM 128 Encryption, SSH Authorization) and File Reliability (Checksumming, File Verification, and Transfer Reliability) that scale with core-count. Additional functionality is available through API's, CLI options, and so on.
EScp is currently only available for x86-64 on Linux. If you would like to see Platform supported, please open a ticket at https://github.com/ESnet/EScp.
EScp is in active development. The latest tagged releases likely offers the best stability. Currently that is 0.8.1.
At this point, most scp flags are supported although not necessarily 1:1. EScp adds additional flags to support high performance transfer flows.
# Ubuntu
apt install cmake libtool g++ nasm autoconf automake rustup
git checkout 0.8.1
cargo install cargo-deb
cargo deb
sudo dpkg -i target/debian/escp_0.8.1-1_amd64.deb
# Uninstall
# dpkg -r escp
Energy Sciences Network transfer tool (EScp)
Usage: escp [OPTIONS] <SOURCE>... <DESTINATION>
Arguments:
<SOURCE>... Source Files/Path
<DESTINATION> Destination host:<path/file> [default: ]
Options:
-P, --port <SSH_PORT> SSH Port
--escp_port <ESCP_PORT> ESCP Port [default: 1232]
-v, --verbose Verbose/Debug output
-q, --quiet
-A, --agent Enable SSH Agent Forwarding
-c, --cipher <CIPHER> CIPHER used by SSH
-i, --identity <IDENTITY> IDENTITY pubkey for SSH auth
-l, --limit <LIMIT> LIMIT/thread (bytes/sec) using SO_MAX_PACING_RATE
-p, --preserve Preserve source attributes (TODO)
-C, --compress Enable Compression
--sparse Sparse file support, use with compression
-r, --recursive Copy recursively
-o <SSH_OPTION> SSH_OPTION to SSH
-S, --ssh <SSH> SSH binary [default: ssh]
-D, --escp <ESCP> EScp binary [default: escp]
--blocksize <BLOCK_SZ> [default: 1M]
--ioengine <IO_ENGINE> posix,dummy [default: posix]
-t, --parallel <THREADS> # of EScp parallel threads [default: 4]
--bits Display speed in bits/s
--nodirect Don't enable direct mode
--nochecksum Don't enable file checksum
-L, --license Display License
-h, --help Print help
-V, --version Print version
Example:
# Transfer file1 and file2 to server host using SSH
escp file1 file2 host:/remoteDirectory
EScp is written by Charles Shiflett with the support of ESnet. EScp is a side project and is not in any way an official or supported project of ESnet, The University of California, Lawrence Berkeley National Lab, or the US Department of Energy.
I'd like to thank my team at ESnet; Anne White, Goran Pejović, Dhivakaran Muruganantham, George Robb, Luke Baker and Shawn Kwang, as well as Brian Tierney, Eli Dart, Ezra Kissel, Ken Miller, Eric Pouyoul, Jason Zurawski, Seyoung You, and Andrew Wiedlea for their support, encouragement, and assistance in developing EScp.
Lastly, thanks to you, for using this application. EScp was written for you! If you are interested in contributing, you are in the unique position of being the first external collaborator to be added here.
ESnet Secure Copy (EScp) Copyright (c) 2021-24, The Regents of the
University of California, through Lawrence Berkeley National Laboratory
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