samba - Dec 2004 - Copying between physical drives within samba mount - very slow.

I have a situation with a linux box that has several drives mounted under
/master
say /master/drive1 and /master/drive2 ..etc.
I mount /master on my windows machine or os x machine using samba.

when I move files from /master/drive1 to /master/drive2 the copy process
is very slow.

it seems samba actually sends the file over he network from the linux
machine to the pc on which it is mounted and back to the linux machine.

This only happens when there are different drives involved.  however if i
move files within the same drive it is fast as expected.

why does samba send the whole file across the network and back?  is there
a way to avoid this?

Here is my config
red hat 9
samba 3.0.x
system drive = /
data drive 1= /master/drive1
data drive 2 = /master/drive2
mounted system on pc under /master  so I see on my pc drive1 folder and
drive2 folder.
Dragging from drive1 to drive2 seems to pass the whole file across the
network from drive1 to drive2.

If I create folders ... say /master/folder1 and /master/folder2. these
folders are not seperate drives.  Then movign files between them is
lightening fast as expected.

Hope someone can help.

panos

> -----Original Message-----
> From: samba-bounces+mitch=webcob.com@lists.samba.org [mailto:samba-
> bounces+mitch=webcob.com@lists.samba.org] On Behalf Of Panos Koutsoyannis
> Sent: December 11, 2004 1:11 PM
> To: samba@lists.samba.org
> Subject: [Samba] Copying between physical drives within samba mount -
> veryslow.
> 
> I have a situation with a linux box that has several drives mounted under
> /master
> say /master/drive1 and /master/drive2 ..etc.
> I mount /master on my windows machine or os x machine using samba.
> 
> when I move files from /master/drive1 to /master/drive2 the copy process
> is very slow.
> 
> it seems samba actually sends the file over he network from the linux
> machine to the pc on which it is mounted and back to the linux machine.
> 
> This only happens when there are different drives involved.  however if i
> move files within the same drive it is fast as expected.
> 
[Mitch says:] This is similar to Linux itself - if you were moving within an
NFS mount point, you would move... which I believe is commonly implemented
as a hardlink to the second location OR a copy if on a different physical
location, then an unlink from the old location...

Windows / SMB has the same limitation in the protocol - There is no "rpc
move" used (or even existing I think?) so it does what it has to do within
the protocol - you will of course see much faster throughput by doing these
major moves locally on the server box through a shell if that is an option
for you.

m/

Thanks for the response.  Yeah I saw the same behavior with NFS.  It
would be nice to have an rpc.move.  

However, if I use netatalk the does not copy across the wire.  I have
not looked into the detail of the protocol.  However, it has its own
limitations.


Do you know of any movement in this area?  Logging in directly is not an
option for our clients.  I have looked at netatalk, samba, nfs and
webdav stuff.

Panos


-----Original Message-----
From: Mitch (WebCob) [mailto:mitch@webcob.com] 
Sent: Saturday, December 11, 2004 3:56 PM
To: panos@kamaradata.com; samba@lists.samba.org
Subject: RE: [Samba] Copying between physical drives within samba mount
- veryslow.


> -----Original Message-----
> From: samba-bounces+mitch=webcob.com@lists.samba.org [mailto:samba-
> bounces+mitch=webcob.com@lists.samba.org] On Behalf Of Panos
Koutsoyannis
> Sent: December 11, 2004 1:11 PM
> To: samba@lists.samba.org
> Subject: [Samba] Copying between physical drives within samba mount -
> veryslow.
> 
> I have a situation with a linux box that has several drives mounted
under
> /master
> say /master/drive1 and /master/drive2 ..etc.
> I mount /master on my windows machine or os x machine using samba.
> 
> when I move files from /master/drive1 to /master/drive2 the copy
process
> is very slow.
> 
> it seems samba actually sends the file over he network from the linux
> machine to the pc on which it is mounted and back to the linux
machine.
> 
> This only happens when there are different drives involved.  however
if i
> move files within the same drive it is fast as expected.
> 
[Mitch says:] This is similar to Linux itself - if you were moving
within an
NFS mount point, you would move... which I believe is commonly
implemented
as a hardlink to the second location OR a copy if on a different
physical
location, then an unlink from the old location...

Windows / SMB has the same limitation in the protocol - There is no "rpc
move" used (or even existing I think?) so it does what it has to do
within
the protocol - you will of course see much faster throughput by doing
these
major moves locally on the server box through a shell if that is an
option
for you.

m/

> when I move files from /master/drive1 to /master/drive2 the copy process
> is very slow.
>
> why does samba send the whole file across the network and back?  is there
> a way to avoid this?
why not rsync from /master/drive1 to /master/drive2?
--
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RANKIN LAW FIRM, PLLC
510 Ochiltree Street
Nacogdoches, Texas 75961
(936) 715-9333
(936) 715-9339 fax
www.rankin-bertin.com
--
----- Original Message ----- 
From: "Panos Koutsoyannis" <panos@kamaradata.com>
To: <samba@lists.samba.org>
Sent: Saturday, December 11, 2004 3:10 PM
Subject: [Samba] Copying between physical drives within samba mount - 
veryslow.

>
>
> I have a situation with a linux box that has several drives mounted under
> /master
> say /master/drive1 and /master/drive2 ..etc.
> I mount /master on my windows machine or os x machine using samba.
>
>
> Here is my config
> red hat 9
> samba 3.0.x
> system drive = /
> data drive 1= /master/drive1
> data drive 2 = /master/drive2
> mounted system on pc under /master  so I see on my pc drive1 folder and
> drive2 folder.
> Dragging from drive1 to drive2 seems to pass the whole file across the
> network from drive1 to drive2.
>
> If I create folders ... say /master/folder1 and /master/folder2. these
> folders are not seperate drives.  Then movign files between them is
> lightening fast as expected.
>
> Hope someone can help.
>
> panos
>
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