Automatic Synchronisation of FTP directory

[Terry Allen]

>At 7:49 PM +1000 7/14/07, Terry Allen wrote:
>>Hi again,
>>	I have a slightly unusual taks to get done as a temporary 
>>backup solution for a client - they have 3 separate sites, all with 
>>hardware based NAS, which have Windows file sharing & FTP. We need 
>>to set up an automated system, with an OSX machine doing a 
>>directory sync every day for a few weeks from the FTP server 
>>running on the NAS (no, rsync or other options aren't available - 
>>must be FTP).
>>	Can anyone suggest say a command line I can add as a cronjob, 
>>or some open source software which might allow us to do this? It 
>>basically needs to log into the FTP server as the 
>>username/password, check the list of files (& any changes to those 
>>files) & back up those which have changed, then log back out once 
>>the job is completed.
>>	Any assistance would be appreciated on this.
>
>What you are describing is not so much a backup as data replication.
>
>Why must you use FTP if the NAS box has SMB? That would seem to be 
>the way to go, and then just use rsync (with all its caveats.)
>
>Otherwise consider using `find` to locate files that have changed or 
>been added, with again all the associated caveats about what that 
>means, and ftp these files. You'd just need to keep track of when 
>the last time you performed the replication.
>
>You also don't talk about deleting files that are no longer present 
>on the source. You should consider this in your thinking.
>--
>
>-dhan
>
Hi again,
	Yes, data replication is what we need to do & yes, we do need 
to delete files which are no longer there (I had thought 
synchronisation would cover that, but in any case, yes, that is true).
	The reason we didn't want to use SMB in this case is that the 
port on their network for this is not open to the Internet as their 
SMB network is otherwise unsecured, though I guess it would be as 
simple as directing inward enquiries for that port to the NAS.
	I'm not sure I understand how I could use rsync for such a 
purpose - I thought rsync required an rsync client & server - could 
you please elaborate on how we would use rsync for such an exercise 
using SMB.
-- 

	Bye for now, Terry Allen 
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