Displaying 20 results from an estimated 2000 matches similar to: "Prelim results: hpnssh v ssh in local area networks"
2006 May 19
1
New HPN Patch Released
The HPN12 patch available from
http://www.psc.edu/networking/projects/hpn-ssh addresses performance
issues with bulk data transfer over high bandwidth delay paths. By
adjusting internal flow control buffers to better fit the outstanding
data capacity of the path significant improvements in bulk data
throughput performance are achieved.
In other words, transfers over the internet are a lot
2007 Nov 09
1
HPN SSH
Hello,
I know that this has been asked before, just wanted to mention that I,
too, would like to see the HPN SSH functionality incorporated in the
standard OpenSSH.
Would there be technical disadvantages integrating the changes?
I know we are all pretty busy, but I would certainly spend time to help,
e.g. with testing, documentation, etc.
Cheers
--pwo
--
Peter W. Osel - http://pwo.de/ - pwo
2007 Nov 24
1
enable none cipher
Hello,
Does anybody know how cam I enable the usage of the 'none' cipher in
OpenSSH 4.7
yours,
Mihai
2009 Apr 30
3
tool for packet detection
Hi
I have small query, all our server are centos based 5 and 5.2 . We are
looking ofr a tool to that measure packet loss. we have servers in two IDC's
bothin the US and we are trying to download a 2gb file from the internet.
Some server are able to download the file at a higher b/w rate in one IDC
...while servers at he the other IDC download the same file at a lowe b/w
rate . Is ther any
2015 Jan 23
8
network copy performance is poor (rsync) - debugging suggestions?
Hi,
I do have two centos 6.6 servers. With a "performance optimized" rsync I
get an speed of 15 - 20 MB/s
The options I use are:
rsync -aHAXxv --numeric-ids --progress -e "ssh -T -c arcfour -o
Compression=no -x"
If I copy files by smb to/from the servers I do get 60 - 80 MB/s, a dd
(r/w) on the storages attached gives 90 MB/s on the 1Gbit ISCSI (Source
Server) and up to
2015 Aug 11
2
rsync stuck at +- 50 MB/s, cp and scp are +- 200 MB/s
Hi,
I tried different encryptions like arc four, but always with the same result. BTW: googling shows some similar questions and they are stuck on set same speed +-.
But non of that solutions helped me.
/G?tz
> Am 11.08.2015 um 12:14 schrieb Eero Volotinen <eero.volotinen at iki.fi>:
>
> Usually problem in encryption.
>
> try cipher arcfour or apply hpn patches to
2015 Aug 11
3
rsync stuck at +- 50 MB/s, cp and scp are +- 200 MB/s
Hi,
i have two servers, connected to to the lan by 10Gb with 10Gb and DAS
hardware raid.
Each system con read and write locally or to the 10G iscsi by more than
200 MB/s.
Now I have to transfer backups form A to B and doing this with rsync
always stuck at +- 48-50MB/s no matter which options, compressions,
encryption etc I use. Even the plain default rsync is at that 50 Mb limit.
coyp by scp
2009 Feb 17
1
Support for merging LPK and hpn-ssh into mainline openssh?
Hello
Are there plans to merge the hpn-ssh
(http://www.psc.edu/networking/projects/hpn-ssh/) and the LPK
(http://code.google.com/p/openssh-lpk/) into the mainline openssh.
Adding lpk has been logged as a bug in bugzilla as
They are two patches that I always apply as the performance boost from
hpn-ssh is substantial to say the least, and centralisation of the
authorized_keys into a LDAP server
2013 Jan 02
1
ssh / scp slow on 10GBE
Hello list,
right now SSH Tunnel / scp is reaches just around 76Mb/s on my E5 Xeon
using AES-NI but openssl reaches around 600-700Mb/s using 128aes-cbc cipher.
As far as i understand http://www.psc.edu/index.php/hpn-ssh this is due
to very small buffers in ssh / scp.
Is there any work on this? Like autotuning the buffer size? Are there
plans to integrate the hpn patches?
Greets,
Stefan
2005 Jun 17
3
New Set of High Performance Networking Patches Available
http://www.psc.edu/networking/projects/hpn-ssh/
Mike Stevens and I just released a new set of high performance
networking patches for OpenSSH 3.9p1, 4.0p1, and 4.1p1. These patches
will provide the same set of functionality across all 3 revisions. New
functionality includes
1) HPN performance even without both sides of the connection being HPN
enabled. As long as the bulk data flow is in the
2006 Mar 25
1
High Performance SSH/SCP - HPN-SSH when?
Hi,
http://www.psc.edu/networking/projects/hpn-ssh/
Clearly, the HPN patches significantly boost throughput performance.
This enhancement is entirely from tuning the SSH buffer sizes.
Alex Tavcar
2011 Feb 06
3
OpenSSH could be faster...then why don't they path it??
https://www.psc.edu/networking/projects/hpn-ssh/hpn-v-ssh-tput.jpg
"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
2005 Sep 08
1
HPN Patch for OpenSSH 4.2p1 Available
Howdy,
As a note, we now have HPN patch for OpenSSH 4.2 at
http://www.psc.edu/networking/projects/hpn-ssh/
Its still part of the last set of patches (HPN11) so there aren't any
additional changes in the code. It patches, configures, compiles, and
passes make tests without a problem. I've not done extensive testing for
this version of openssh but I don't foresee any problems.
I
2018 Jun 05
2
OpenSSH & OpenSSL 1.1
Howdy all,
I know that the OpenSSH team has made a clear and well justified
decision regarding interoperability with OpenSSL 1.1. I respect that
entirely. That said, I've recently had to deal with a couple of users
who had a specific set of requirements with building OpenSSH 7.7 using
patches for OpenSSL 1.1 found in the slackware package.
2005 Mar 25
1
New HPN patch released for 3.9
We've released a new HPN (High Performance Network) patch for OpenSSH
3.9p1. We've made two major changes - first off we backed out of all
the modifications we made to buffer.c. Turns out that it just wasn't
necessary once we fixed a nagging bug in channels.c. I also made a
minor change to the buffer sizes in the source and sink functions in
scp.c Increasing the size of both
2007 Aug 21
1
High Performance SSH/SCP - HPN-SSH
Dear CentOS lovers,
Could you consider to include a patch,
http://www.psc.edu/networking/projects/hpn-ssh/
for openssh maybe as CentosPlus packages?
It has great speed impact for long-distance ( high delay ) transfer.
Regards,
Yuji Tsuchimoto
2006 Mar 16
0
New Version of HPN-SSH Patch
[NB: General information regarding HPN-SSH can be found at
http://www.psc.edu/networking/projects/hpn-ssh ]
This is a beta release of HPN12 but I'd like to get some user
experiences with it if anyone is so inclined. This version of the HPN
patch more closely conforms to the openssh nomenclature and coding
style, it eliminates the use of command line switches in favor of -o
options, it
2019 Oct 15
6
“Stripped-down” SSH (no encryption or authentication, just forwarding)
There have been many cases where I have found myself in need of a pure
forwarding tool that can forward sockets over a single stream. In my
use cases, this stream is already secure, so there is no need for the
tool to do any encryption or authentication. One specific use-case was
forwarding a Docker socket to another VM over QubesOS qrexec qrexec,
which uses Xen shared memory, but there are
2009 Feb 08
1
rsync oldest files first
Hello -
Running rsync v3.0.5 on a mixture of CentOS 4.6 and 5.1 systems,
using hpnssh as the transport mechanism.
I am using rsync to replicate roughly a TB worth of compressed log
data per day from a bunch of systems for processing.
Every hour the systems generate log files, compress them and then
rsync pushes them out to a centralized set of redundant hosts
with their storage connected to a
2005 Oct 04
1
HPH-SSH code incorporation
Hi,
We are deciding on to either entirely use HPH code to our
OpenSSH or not for systems globally and I come down to a question.
If HPH-SSH code is such an improvement to network performance for
OpenSSH, then why has it not been incorporated to the OpenSSH code? Is
there a reason? Is it because there are problems with the HPH-SSH code?
Since the code has been out for a time and still has not