[unison-users] copyprog with SCP

[Alain Mouette [e-mail] [unison-users]]

Please help me configuring SCP for file copy...

My problem is that I hava a partition with many VirtualBox machines,
disk images range from 5 to 8 Giga bytes each.
Copy for these files is exceedingly slow, around 4kb/s, eats a lot od
CPU power on the sending machine and there is very little network trafic !!!

I changed to rsync, but it only got marginaly better. Here is how I
configured it:
----------
copythreshold = 50000
copyprogrest = rsync --partial --append-verify --compress
copyprog = rsync --partial --inplace --compress
----------

copying with sftp goes at 4Mb/s, how could I use SCP for external copy???

Thanks,
Alain

[Adrian Klaver [e-mail] [unison-users]]

Post by Alain Mouette ***@pobox.com [unison-users]
Please help me configuring SCP for file copy...
My problem is that I hava a partition with many VirtualBox machines,
disk images range from 5 to 8 Giga bytes each.
Copy for these files is exceedingly slow, around 4kb/s, eats a lot od
CPU power on the sending machine and there is very little network trafic !!!
I changed to rsync, but it only got marginaly better. Here is how I
----------
copythreshold = 50000
copyprogrest = rsync --partial --append-verify --compress
copyprog = rsync --partial --inplace --compress
----------
copying with sftp goes at 4Mb/s, how could I use SCP for external copy???

Best guess is that compression is eating up the CPU cycles. Try without
compression and see what happens.

Post by Alain Mouette ***@pobox.com [unison-users]
Thanks,
Alain

[Adrian Klaver [e-mail] [unison-users]]

On 05/17/2016 09:42 AM, Alain Mouette wrote:

Ccing list

It seems the nobody knows how to use an external program other than
*rsync* for big file copy..
_*Is there any DOC on how the external program is called*__*? Command
line parameters and such ???*_

Here is an example for a different program:

https://alliance.seas.upenn.edu/~bcpierce/wiki/index.php?n=Main.UnisonFAQTips

See:

Is it possible to synchronize two hosts via a removable drive?

I DID search the doc for quite a time and could not find it
Please Help,
Alain

[[e-mail] [unison-users]]

Post by Alain Mouette ***@pobox.com [unison-users]
Please help me configuring SCP for file copy...
My problem is that I hava a partition with many VirtualBox machines,
disk images range from 5 to 8 Giga bytes each.
Copy for these files is exceedingly slow, around 4kb/s, eats a lot od
CPU power on the sending machine and there is very little network trafic !!!
I changed to rsync, but it only got marginaly better. Here is how I
----------
copythreshold = 50000
copyprogrest = rsync --partial --append-verify --compress
copyprog = rsync --partial --inplace --compress
----------
copying with sftp goes at 4Mb/s, how could I use SCP for external copy???

It looks like you've got some ugly problem with network copies
themselves. First, find out how to copy files across the network
quickly; after that, work on configuring Unison to use that method.

Dale