Re: backup via an intermediate drive

2008-02-12 Thread Cavan Fyans


On 12 Feb 2008, at 00:01, Matt McCutchen wrote:


On Mon, 2008-02-11 at 23:58 +, Cavan Fyans wrote:

Thanks for the quick help guys!  The external backup server will be
online, just not with a large enough connection to realistically
backup via the connection, hence the transportation system!

Since it will be online then presumably i can use the write-batch
option as the in house server will be able to see the backup server  
to

decide what needs transferring, and then just do the transporting of
the batch on the intermediate drive?


Yes, that should work well.

Matt





Great, thanks for all the help!  One other problem now, one of the  
studio servers is an XServe and therefore running off an OS x  
machine.  It has an older version of RSync installed on it (2.6.3)  
which does not have the 'only-write-batch' option - I presume this was  
just added in the newer versions and its not something that is  
excluded in the build for the OS x system?  I tried updating to the  
latest RSync version (2.6.9) on this machine but after installing (./ 
configure, make, make install) it has clearly not replaced the  
previous version of Rsync.  Am I missing something blindingly obvious  
here that i need to do to update the RSync version on the OS x machine?


Thanks.
Cav.
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Re: backup via an intermediate drive

2008-02-12 Thread Matt McCutchen
On Tue, 2008-02-12 at 17:57 +, Cavan Fyans wrote:
 One other problem now, one of the  
 studio servers is an XServe and therefore running off an OS x  
 machine.  It has an older version of RSync installed on it (2.6.3)  
 which does not have the 'only-write-batch' option - I presume this was  
 just added in the newer versions and its not something that is  
 excluded in the build for the OS x system?

Correct.  According to OLDNEWS, --only-write-batch was added in rsync
2.6.5.

 I tried updating to the  
 latest RSync version (2.6.9) on this machine but after installing (./ 
 configure, make, make install) it has clearly not replaced the  
 previous version of Rsync.  Am I missing something blindingly obvious  
 here that i need to do to update the RSync version on the OS x machine?

The source package's make install puts the executable
at /usr/local/bin/rsync by default; it won't replace any rsync
executables you might have elsewhere on the machine.  If the wrong
version of rsync is being invoked, try using the full
path /usr/local/bin/rsync .

Matt

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backup via an intermediate drive

2008-02-11 Thread Cavan Fyans

Hi,

I have a backup server running for a media company i work with that's  
being moved offsite to a server house.  Obviously I still want to run  
the regular backups but the problem is that the outgoing connection  
from the companies studio can not handle the amount of data that needs  
to be transferred.  Due to this the server housing company has  
provided a service through which they will transport the data to be  
backed up in person, on a mobile drive.


The question is, can I run the same Rsync service but transfer the  
updated/changed files from the studio onto the backup server via the  
intermediate drive?


Thanks.
Cav.
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Re: backup via an intermediate drive

2008-02-11 Thread Matthias Schniedermeyer
On 11.02.2008 21:43, Cavan Fyans wrote:
 Hi,

 I have a backup server running for a media company i work with that's  
 being moved offsite to a server house.  Obviously I still want to run  
 the regular backups but the problem is that the outgoing connection from 
 the companies studio can not handle the amount of data that needs to be 
 transferred.  Due to this the server housing company has provided a 
 service through which they will transport the data to be backed up in 
 person, on a mobile drive.

 The question is, can I run the same Rsync service but transfer the  
 updated/changed files from the studio onto the backup server via the  
 intermediate drive?

I guess the capacity of the transport drive is way lower than the whole 
storage needed?

Then the option is:
--write-batch

But as far as i understand it, you need a second (in this case local) 
rsync-target that MUST be in sync with the remote server, before doing 
the batch, so you can create the batch-file against it. Then you 
transport the batch-file and last but not least apply it to the target 
server.

Then comes the next day and you are back at square 1. :-)


But if you can tell more about the data and how it changes, there maybe 
better(tm) ways to transfer them, especially when you have a disaster 
sync event.



Bis denn

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Re: backup via an intermediate drive

2008-02-11 Thread Matthias Schniedermeyer
On 12.02.2008 00:03, Matthias Schniedermeyer wrote:
 On 11.02.2008 21:43, Cavan Fyans wrote:
  Hi,
 
  I have a backup server running for a media company i work with that's  
  being moved offsite to a server house.  Obviously I still want to run  
  the regular backups but the problem is that the outgoing connection from 
  the companies studio can not handle the amount of data that needs to be 
  transferred.  Due to this the server housing company has provided a 
  service through which they will transport the data to be backed up in 
  person, on a mobile drive.
 
  The question is, can I run the same Rsync service but transfer the  
  updated/changed files from the studio onto the backup server via the  
  intermediate drive?
 
 I guess the capacity of the transport drive is way lower than the whole 
 storage needed?
 
 Then the option is:
 --write-batch
 
 But as far as i understand it, you need a second (in this case local) 

Strike the second, reading the next line of the man-page reveals the 
--only-write-batch-option. :-)





Bis denn

-- 
Real Programmers consider what you see is what you get to be just as 
bad a concept in Text Editors as it is in women. No, the Real Programmer
wants a you asked for it, you got it text editor -- complicated, 
cryptic, powerful, unforgiving, dangerous.

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Re: backup via an intermediate drive

2008-02-11 Thread Cavan Fyans


On 11 Feb 2008, at 23:51, Matt McCutchen wrote:


On Tue, 2008-02-12 at 00:14 +0100, Matthias Schniedermeyer wrote:

On 12.02.2008 00:03, Matthias Schniedermeyer wrote:
I guess the capacity of the transport drive is way lower than the  
whole

storage needed?

Then the option is:
--write-batch

But as far as i understand it, you need a second (in this case  
local)


Strike the second, reading the next line of the man-page reveals the
--only-write-batch-option. :-)


Using --only-write-batch instead of --write-batch does not remove the
need for a local copy of the backup server's contents that rsync can  
use

to determine what data to include in the batch file.



Thanks for the quick help guys!  The external backup server will be  
online, just not with a large enough connection to realistically  
backup via the connection, hence the transportation system!


Since it will be online then presumably i can use the write-batch  
option as the in house server will be able to see the backup server to  
decide what needs transferring, and then just do the transporting of  
the batch on the intermediate drive?


Cav
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Re: backup via an intermediate drive

2008-02-11 Thread Matt McCutchen
On Tue, 2008-02-12 at 00:14 +0100, Matthias Schniedermeyer wrote:
 On 12.02.2008 00:03, Matthias Schniedermeyer wrote:
  I guess the capacity of the transport drive is way lower than the whole 
  storage needed?
  
  Then the option is:
  --write-batch
  
  But as far as i understand it, you need a second (in this case local) 
 
 Strike the second, reading the next line of the man-page reveals the 
 --only-write-batch-option. :-)

Using --only-write-batch instead of --write-batch does not remove the
need for a local copy of the backup server's contents that rsync can use
to determine what data to include in the batch file.

Cavan, if you don't like having the extra copy, you might be better
served by GNU tar's incremental archives (--listed-incremental, see
`info tar` for more information).  Tar maintains a state file on the
source machine to remember what changes have been put into incremental
archives.  Each time you ask tar to make an incremental archive, it will
look at the state file to see what changes to include and then update
the state file.  If you transport the incremental archives to the backup
server and extract them there in order, you will maintain a copy of the
source directory.

(I'm recommending GNU tar's state-based incremental mode because it is
ready-to-use now.  It would be possible to add a similar state-based
incremental mode to rsync (or perhaps Unison), but AFAIK no one has done
it.  If you like, you could script your own incremental mode around
rsync using --files-from.)

Matt

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Re: backup via an intermediate drive

2008-02-11 Thread Matt McCutchen
On Mon, 2008-02-11 at 23:58 +, Cavan Fyans wrote:
 Thanks for the quick help guys!  The external backup server will be  
 online, just not with a large enough connection to realistically  
 backup via the connection, hence the transportation system!
 
 Since it will be online then presumably i can use the write-batch  
 option as the in house server will be able to see the backup server to  
 decide what needs transferring, and then just do the transporting of  
 the batch on the intermediate drive?

Yes, that should work well.

Matt

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