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[OT]: Keeping a spare machine in sync

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From: Jan Niggemann <jn@hz6.de>
Date: Thu, 02 Feb 2017 00:14:03 +0100

   Hello list,
   
   I thought I'd seek your advice, as this is more or less related to  
   backing stuff up.
   I have 2 identical machines A and B. A is my main server, B should be  
   a "cold spare".
   I cloned A's hdd to B's, so they were identical at the moment of  
   cloning (no lvm or raid).
   
   My idea is to power up B every now and then and sync its hdd, so that  
   it's the same as A's hdd.
   In case of failure, I power up B, restore the latest backup, and  
   quickly have a running system.
   
   What would be the best way to keep B's hdd in sync? My current method  
   is booting B from another medium and rsync'ing the root partition from  
   A. I also thought about bdsync (syncs block devices), but can't see a  
   clear advantage...
   
   How do you or would you handle this?
   Thank you for sharing your thoughts!
   
   Jan
From: SanskritFritz <sanskritfritz@gmail.com>
Date: Thu, 2 Feb 2017 09:41:11 +0100

   Syncthing is my choice.
   
   https://wiki.archlinux.org/index.php/Syncthing
   
   
   
   
   On Thu, Feb 2, 2017 at 12:14 AM, Jan Niggemann <jn@hz6.de> wrote:
   >
   > Hello list,
   >
   > I thought I'd seek your advice, as this is more or less related to backing
   > stuff up.
   > I have 2 identical machines A and B. A is my main server, B should be a
   > "cold spare".
   > I cloned A's hdd to B's, so they were identical at the moment of cloning (no
   > lvm or raid).
   >
   > My idea is to power up B every now and then and sync its hdd, so that it's
   > the same as A's hdd.
   > In case of failure, I power up B, restore the latest backup, and quickly
   > have a running system.
   >
   > What would be the best way to keep B's hdd in sync? My current method is
   > booting B from another medium and rsync'ing the root partition from A. I
   > also thought about bdsync (syncs block devices), but can't see a clear
   > advantage...
   >
   > How do you or would you handle this?
   > Thank you for sharing your thoughts!
   >
   > Jan
   >
   > --
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   > F013 93C0 306C 1E31 4E00  09FA 21EC A2F6 514F CA9C
   >
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