Re: server-side-copy: seems not to get used

On Tue, 24 Mar 2026 13:50:03 +0100
"Stefan G. Weichinger via samba" <[email protected]> wrote:

> Am 24.03.26 um 13:38 schrieb Stefan G. Weichinger via samba:
> > Am 23.03.26 um 16:10 schrieb Rowland Penny via samba:
> > 
> >> Have tried connecting via smbclient and using 'scopy' (see 'man
> >> smbclient' for more info) to see if server side copy works ?
> > 
> > No! Didn't know about that ... will try that asap. Currently I
> > don't have a working AD user (samba is domain member, and that
> > AD-domain is administered by some other company).
> > 
> > smbclient with root seems not to work  ... hmm
> 
> forget that. set a password, works.
> 
> I access that server over my openvpn-connection.
> 
> Started a scopy of my 15 GB pcap file from yesterday
> 
> and watched the traffic graph on my local firewall/router: no traffic
> seen
> 
> scopy runs ... but compared to a "time cp bu18.pcap bu19.pcap" in a 
> ssh-session it's around one minute slower
> 
> 15 GB in 1:50 minutes for "cp in ssh"
> 
> vs ~ 3:00 minutes for "scopy in smbclient"
> 
> Does that tell me that server side copy works already?
> 

Probably not :-(

I copied a 3.1GB .iso file into a share directory, this took approx 51
seconds I then connected to the share and copied the .iso to a new name
with smbclient scopy, this took approx 15 seconds, or to put it another
way, it was faster.

scopy attempts to use server-side copy but if it fails it falls back to
using read then write.

Rowland

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