Subject: Re: FYI - An interesting method to backup your system
To: <>
From: ROC <roryoc@nc.rr.com>
List: port-hpcmips
Date: 08/22/2004 11:24:58
See how ncftp with its recursive feature fares/compares.  I would be 
interested to know the results.

Rory

Tim Underwood wrote:

>You can fire it up - and then just walk away.  Make a pot of coffee.
>Make 2. Sleep on it.  When you get up, brush your teeth slowly.
>
>Takes quite a while.
>
>One issue though with backing something up and then FTP'ing it, is the
>limited storage on the MobilePro to begin with.  You've got to have room
>for that tarfile or dump before sending it on it's way.  Unless you are
>just FTP'ing individual files of course.  But for a full backup?????
>
>  
>
>>-----Original Message-----
>>From: port-hpcmips-owner@NetBSD.org 
>>[mailto:port-hpcmips-owner@NetBSD.org] On Behalf Of ROC
>>Sent: Saturday, August 21, 2004 10:25 PM
>>To: port-hpcmips@NetBSD.org
>>Subject: Re: FYI - An interesting method to backup your system
>>
>>
>>Carl Wilhelm Soderstrom wrote:
>>
>>    
>>
>>>On 08/19 04:04 , Tim Underwood wrote:
>>> 
>>>
>>>      
>>>
>>>>cd /
>>>>tar -cvzf - * | ssh <targetsystem> -l <userid> dd of=backupfile.tgz
>>>>
>>>>One of those things that's completely logical, but I hadn't 
>>>>        
>>>>
>>thought of 
>>    
>>
>>>>before.
>>>>   
>>>>
>>>>        
>>>>
>>>yep. I thought it was the coolest thing in the world when someone 
>>>pointed that one out to me. I usually do it slightly 
>>>      
>>>
>>differently (ssh 
>>>from the backing-up host to the client, then tar there, 
>>piping it back 
>>    
>>
>>>down to a local dd or tar client); but the concept is the same.
>>>
>>>for a fancier way to back up your system, which handles laptops with 
>>>aplomb and gives you a nice web-based GUI for restores, I heartily 
>>>recommend BackupPC (backuppc.sf.net). It just uses rsync and ssh to 
>>>back up anything that can accept an rsync or ssh connection. 
>>>      
>>>
>>niftiest 
>>    
>>
>>>thing I've seen in ages; and the developer is a really great 
>>>      
>>>
>>& helpful 
>>    
>>
>>>guy.
>>>
>>> 
>>>
>>>      
>>>
>>The tar/ssh is good for secure copies, but, on Solaris at 
>>least, I found 
>>it to take about 10 times longer (probably due to all the 
>>pipelining/encrypting/decrypting/network handshaking? ) than straight 
>>FTP, so not a good option for lots of data (i.e. over a few 
>>dozen MB or 
>>so) if time is any kind of issue.  And since that was on 
>>100Mb Ethernet 
>>with Gigabit backbone between Enterprise class UltraSPARC servers, I 
>>suspect a MobilePro with 10Mb ethernet card (can't use the 
>>100Mb cardbus 
>>cards, right?) would be another 10 times slower or so due to the NIC 
>>speed, and that does not factor in the ssh load on that 
>>little ol'  MIPS 
>>processor at 168 Mhz compared to dual or quad 400 Mhz 
>>UltraSPARC cpu's, 
>>and  2-4GB of  RAM...
>>
>>Anyone done any timings?
>>
>>-- 
>>FWIW
>>--
>>Rory O'Connor
>>    
>>
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