1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

HPN-SSH: A High-Performance SSH/SCP

Free Software

Published on 30 August 2013 09:40 AM EDT
Written by Michael Larabel in Free Software
5 Comments

HPN-SSH is a high performance SSH/SCP implementation coming out of the Pittsburgh Supercomputing Center. The code to HPN-SSH is released as a patch-set atop OpenSSH.

HPN-SSH comes from researchers at the Pittsburgh Supercomputing Center (PSC) as a high performance version of SSH/SCP. The abstract on the paper regarding this work states, "SCP and the underlying SSH2 protocol implementation in OpenSSH is network performance limited by statically defined internal flow control buffers. These buffers often end up acting as a bottleneck for network throughput of SCP, especially on long and high bandwith network links. Modifying the ssh code to allow the buffers to be defined at run time eliminates this bottleneck. We have created a patch that will remove the bottlenecks in OpenSSH and is fully interoperable with other servers and clients. In addition HPN clients will be able to download faster from non HPN servers, and HPN servers will be able to receive uploads faster from non HPN clients. However, the host receiving the data must have a properly tuned TCP/IP stack. Please refer to this tuning page for more information. The amount of improvement any specific user will see is dependent on a number of issues. Transfer rates cannot exceed the capacity of the network nor the throughput of the I/O subsystem including the disk and memory speed. The improvement will also be highly influenced by the capacity of the processor to perform the encryption and decryption. Less computational expensive ciphers will often provide better throughput than more complex ciphers."

HPN-SSH is implemented atop OpenSSH as patches. Those wanting to give it a try or to read more into this academia research project, visit PSC.edu.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Linux Hardware Reviews
  1. AMD Radeon R9 290: Gallium3D vs. Catalyst Drivers
  2. AMD Radeon R9 290 Open-Source Driver Works, But Has A Ways To Go
  3. Trying The Configurable 45 Watt TDP With AMD's A10-7800 / A6-7400K
  4. Sumo's Omni Gets Reloaded
Latest Linux Articles
  1. 20-Way Radeon Comparison With Open-Source Graphics For Steam On Linux Gaming
  2. Preview: OS X 10.10 Yosemite vs. Ubuntu Linux GPU Performance
  3. Radeon Graphics Yield Mixed Results With Linux 3.17 Kernel
  4. AMD's RadeonSI Driver Sped Up A Lot This Summer
Latest Linux News
  1. Radeon DRM Queues More Changes, RV6xx UVD For Linux 3.18
  2. Nouveau On Oibaf PPA Is Back To Running Well
  3. Metro 2033 Redux Will Hopefully Hit Linux Real Soon
  4. New Virtual Monitor Software Might End Up On Linux
  5. Company of Heroes 2 Might Be Coming Out For Linux
  6. NIR Still Being Discussed For Mesa, LLVM Gets Brought Up Again
  7. Plasma Active Is Mostly Ported To KDE Frameworks 5
  8. Google Chrome 37 Brings Many Security Fixes
  9. MenuetOS Updated With SMP Threads & Onscreen Keyboard
  10. Mesa Has A New Release Manager
Latest Forum Discussions
  1. Canonical Joined The Khronos Group To Help Mir/Wayland Drivers
  2. AMD Releases UVD Video Decode Support For R600 GPUs
  3. Announcing radeontop, a tool for viewing the GPU usage
  4. Updated and Optimized Ubuntu Free Graphics Drivers
  5. [DB] BIOS - ACPI - data collecting
  6. It's Now Possible To Play Netflix Natively On Linux Without Wine Plug-Ins
  7. Users defect to Linux as OpenBSD removes Lynx from base system
  8. Chinese People Try To Patent Wine On ARM