Re: Backup solutions wanted

Hi Joel.
The 1TB drive in this machine currently holds about 600GB of digital 
photography., so I dont want to rewrite the whole lot every night :)
I also dont have room for multiple dated copies of the 600GB of data.
All I want is a copy of the drive contents from this machine kept on the 
server drive as well, so in the event of a failed drive I havent lost 
200,000 photos.

cheers
chris


Joel Macklow wrote:
> Chris
>
> Depends on what you are after.  If you just want an identical sync 
> between the two all the time, then rsync is great because it only 
> copies bit variances....so low traffic and fast.....but because it is 
> always a replica, if you delete a file from the source disk, by the 
> time you want to get it back chances are (in my experience, using a 
> crobjob to automate it) that it will be gone.
>
> Jim's suggestion of rdiff-backup is different as it creates a copy of 
> the original and  then performs differential backups.....To give an 
> example, I have a server where using rdiff-backup I can restore files 
> from and of my data directories at _any_ point in time back to 2007 if 
> I want to......trust me it has saved my bacon on more than one 
> occasion. And it uses hard links, so doesn't use a great amount of 
> disk either.
>
> So the solution (rsync vs rdiff) depends on if you want any versioning 
> history or not.
>
> Just my thoughts....
>
>
> Joel
>
> chris morris wrote:
>> Thanks Jim - at the moment I'm just trying to get first command to work.
>>
>> Even when running it as sudo some directories copy, others wont with 
>> 'permission denied' errors.
>>
>> ( I wish linux would explain WHY permission is denied - at least that 
>> might point me in the right direction to fix it :)
>>
>> cheers
>> c
>>
>>
>> Jim Tittsler wrote:
>>> On Sat, May 30, 2009 at 21:01,  <[email protected]> wrote:
>>>  
>>>> You need to setup SSH key auth, and install rsync on both then run 
>>>> this:
>>>>
>>>> rsync -az -e ssh /media/disk-2 user@fileserver:/media/sda1
>>>>     
>>>
>>> You may also want the '--delete' option to remove files from the 
>>> destination.
>>>
>>> I would also recommend investigating rdiff-backup, which in addition
>>> to maintaining the most recent copy as a file tree that you can copy
>>> from as normal also maintains history so that you can recover file
>>> states at previous invocations of the command.  I run it nightly, and
>>> use the --remove-older-than option to prune it so that I maintain a
>>> rolling 30 days of history.
>>>
>>> Jim
>>> (Hastings this weekend, but normally Gisborne)
>>>
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-- 
Chris Morris
Sportsimages Photography,
Computer Repairs, Websites,
560 Lowe Street
Hastings 4120
06 878 3573
021 2537925
http://www.sportsimages.co.nz