Re: Network Performance?
- Date: Mon, 26 Mar 2018 10:49:14 -0700
- From: Jordan Geoghegan <jgeoghegan60@xxxxxxxxx>
- Subject: Re: Network Performance?
On 03/24/18 17:04, L A Walsh wrote:
What is most important is getting reasonable performance when moving
data via ssh, be it sftp, rsync or some other sort of data tunnelling
via ssh. I need to pull backups from a Windows box, and am only able to
get ~8MB/s from it. All my other machines can saturate the line, even
this Windows box when it isn't using Cygwin. I will be testing WSL
(Windows Subsytem for Linux) to see how its "native" rsync fares in
L A Walsh wrote:
Jordan Geoghegan wrote:
Has anyone ever successfully transferred 150Mbps or more over the
network using scp/sftp/rsync etc on Cygwin?
What is more important? testing cygwin's scp/sftp/rsync, or using 'ssh'
or running under cygwin, or transferring the file to a local backup
server from a windows
client as fast as possible?
Some test notes below(been benching my win<->server speeds since Win98
Using bs=16.0M, count=64, iosize=1.0G
R:1073741824 bytes (1.0GB) copied, 1.66724 s, 614MB/s
W:1073741824 bytes (1.0GB) copied, 3.48363 s, 294MB/s
The above test only tests transfer speed -- not file i/o --
it uses /dev/zero for a source and /dev/null for a target.
Thanks for the info. Would you be able to test file performance over the
network? If you could just try copying a ~1GB file or what have you via
sftp or rsync with actual writes to disk, I would be very interested to
see how the numbers change.
For write, I used cygwin's 'dd' with if=/dev/zero and of=/h/null.
For read, I used if=/h/zero and of=/dev/null.
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