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Two step backup strategy?

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From: Michael Heidecker <Michael@heidecker.net>
Date: Fri, 23 Jun 2017 21:18:49 +0200

   I am trying to setup a new backup strategy and looking at obnam as the 
   tool for helping me.
   
   Since my upload speed to internet is slow, I want to backup my clients 
   first to my Synology NAS  (fast) which in turn backups everything into 
   the cloud automatically.
   
   What would be the best way to do the backup?
   
   (1) Backup the desktop to the NAS with obnam and this backup again with 
   obnam to the cloud
   
   (2) Backup the desktop to the NAS with obnam and rsync the obnam backup 
   to the cloud
   
   (3) Backup the desktop to the NAS with rsync and use obnam to backup 
   this backup the cloud
   
   (4) ???
   
   Since the CPU on the NAS is slow, the preferably first backup should 
   include encryption.
   
   One way to achieve this is to  encfs in reverse mode to generate an 
   encrypted view of my locally unencrypted /home/user directory besides 
   the obnam built-in encrpytion. Would this work?   (I have some encfs 
   encrypted directories on some machines as well which I intent to backup 
   in encrypted state directly)
   
   Thanks
   
   Michael
   
   
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From: Lars Wirzenius <liw@liw.fi>
Date: Sat, 24 Jun 2017 17:30:57 +0300

   On Fri, Jun 23, 2017 at 09:18:49PM +0200, Michael Heidecker wrote:
   > (2) Backup the desktop to the NAS with obnam and rsync the obnam backup to
   > the cloud
   
   Given the constraints you give, I would back up with obnam to the NAS,
   and then backup the Obnam backup repository with rsync to a machine
   elsewhere.
   
   > One way to achieve this is to  encfs in reverse mode to generate an
   > encrypted view of my locally unencrypted /home/user directory besides the
   > obnam built-in encrpytion. Would this work?   (I have some encfs encrypted
   > directories on some machines as well which I intent to backup in encrypted
   > state directly)
   
   I don't know about encfs. I tend to avoid it.
From: SanskritFritz <sanskritfritz@gmail.com>
Date: Sat, 24 Jun 2017 20:13:01 +0200

   On Sat, Jun 24, 2017 at 4:30 PM, Lars Wirzenius <liw@liw.fi> wrote:
   
   > On Fri, Jun 23, 2017 at 09:18:49PM +0200, Michael Heidecker wrote:
   > > One way to achieve this is to  encfs in reverse mode to generate an
   > > encrypted view of my locally unencrypted /home/user directory besides the
   > > obnam built-in encrpytion. Would this work?   (I have some encfs
   > encrypted
   > > directories on some machines as well which I intent to backup in
   > encrypted
   > > state directly)
   >
   > I don't know about encfs. I tend to avoid it.
   >
   > https://sanskritfritz.wordpress.com/2014/04/24/backup-with-obnam-and-encfs/
   It is even linked from obnam.org :D
From: Martin Ho├čbach <mhossbach@gmail.com>
Date: Sat, 24 Jun 2017 20:39:07 +0200

   encfs has been found to have a security flaw, I think. I personally use a
   cascade of obnam (with compression and encryption) and rsnapshot.
   
   On 24 Jun 2017 19:13, "SanskritFritz" <sanskritfritz@gmail.com> wrote:
   
   
   On Sat, Jun 24, 2017 at 4:30 PM, Lars Wirzenius <liw@liw.fi> wrote:
   
   > On Fri, Jun 23, 2017 at 09:18:49PM +0200, Michael Heidecker wrote:
   > > One way to achieve this is to  encfs in reverse mode to generate an
   > > encrypted view of my locally unencrypted /home/user directory besides the
   > > obnam built-in encrpytion. Would this work?   (I have some encfs
   > encrypted
   > > directories on some machines as well which I intent to backup in
   > encrypted
   > > state directly)
   >
   > I don't know about encfs. I tend to avoid it.
   >
   > https://sanskritfritz.wordpress.com/2014/04/24/
   backup-with-obnam-and-encfs/
   It is even linked from obnam.org :D
   
   
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