On 03/24/18 17:04, L A Walsh wrote:
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?
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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?
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
comparison.
Some test notes below(been benching my win<->server speeds since Win98
days)...
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
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The above test only tests transfer speed -- not file i/o --
it uses /dev/zero for a source and /dev/null for a target.
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.
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.
Jordan Geoghegan
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