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Re: Backup ideas

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On 4/28/20 3:15 PM, Default User wrote:
> On 2020-04-28 [TU] at 14:18 EDT, Bob Weber <bobrweber@gmail.com> said:
>
>> According to the manual the -x option is:
>>
>> -x, --one-file-system       don't cross filesystem boundaries
>>
>> Question:
>>
>> When you use rsync, do you ever do it on a live, mounted filesystem
>> from within said machine/filesystem (that is, using the same machine)?
>>
>> Or do you do it on a "dormant" unmounted filesystem, either from
>> another machine or from a "live [usb or .iso] utility distribution or
>> boot disk from which you have booted the same machine?
>>
>> Most references to rsync I have seen just seem to accept as a given,
>> that you are doing it remotely, from across a LAN (or across the
>> world).
>>
>> And don't seem to address whether the machine/filesystem they are
>> rsyncing to/from is "live" (mounted), or can/should be unmounted (like
>> it would be when imaging a disk with dd or Clonezilla, for example.
>>
Yes that is the way I use rsnapshot (which uses rsync) ... on a live system.  I 
do this before an upgrade.  rsnapshot copies the files to a directory under 
/home.  I have a very big /home filesystem.  The files I am interested in are 
under /usr /etc and the various bin opt and lib directories.  These files will 
just be open for reading but not for writing.  There are log files and mail 
files under /var that may be copied in an open for write state but I can loose 
those files if necessary.  Also, files under /tmp and /run may be lost but those 
directories are usually cleared on reboot.  I do run PostgreSQL but the data 
files are under /home (mounted from another partition)  ... these are the kind 
of files that should be backed up on a "dormant" filesystem or after PostgreSQL 
is shut down.  I also run several virtual machines but their files are also 
under /home.

To restore the rsnapshot backup if I need to I run sysrescuecd. I mount the 
filesystems on /root/src and /root/dst and use rsync with the correct options 
including  --delete to get rid of any extra files that were just upgraded.  I 
usually use  -aHXA --one-file-system --progress for rsync backup options.  That 
way I can be sure the file attributes will be preserved.

A note about borgbackup.  I used it a few years ago but I found that ALL 
attributes were not backed up.  Maybe I didn't use the correct options.   The 
many options can be confusing.  The backup medium should be a journaling 
filesystem according to the docs. rsnapshot just duplicates the file structure 
of the source so you can just get one file back if you want rather than having 
to use borg to get the backed up file.


-- 


*...Bob*

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(none) Default User <hunguponcontent@gmail.com> - 2020-04-22 23:00 +0200
  Re: David <bouncingcats@gmail.com> - 2020-04-23 12:00 +0200
  Re: "Alexander V. Makartsev" <avbetev@gmail.com> - 2020-04-23 16:30 +0200
  Re: David Christensen <dpchrist@holgerdanske.com> - 2020-04-24 00:10 +0200
    Re: Default User <hunguponcontent@gmail.com> - 2020-04-24 03:00 +0200
      Re: David Christensen <dpchrist@holgerdanske.com> - 2020-04-24 11:00 +0200
      Backup ideas Andy Smith <andy@strugglers.net> - 2020-04-24 17:40 +0200
        Re: Backup ideas Celejar <celejar@gmail.com> - 2020-04-24 18:30 +0200
          Re: Backup ideas Default User <hunguponcontent@gmail.com> - 2020-04-28 17:50 +0200
            Re: Backup ideas Andrei POPESCU <andreimpopescu@gmail.com> - 2020-04-28 18:20 +0200
              Re: Backup ideas Default User <hunguponcontent@gmail.com> - 2020-04-28 20:30 +0200
                Re: Backup ideas Default User <hunguponcontent@gmail.com> - 2020-04-28 21:20 +0200
                Re: Backup ideas David Christensen <dpchrist@holgerdanske.com> - 2020-04-28 22:30 +0200
                Re: Backup ideas Bob Weber <bobrweber@gmail.com> - 2020-04-28 22:50 +0200
            Re: Backup ideas Bob Weber <bobrweber@gmail.com> - 2020-04-28 20:20 +0200
            Re: Backup ideas Andy Smith <andy@strugglers.net> - 2020-04-28 22:40 +0200
              Re: Backup ideas Celejar <celejar@gmail.com> - 2020-04-29 06:40 +0200
            Re: Backup ideas Celejar <celejar@gmail.com> - 2020-04-29 06:30 +0200
            Re: Backup ideas Alessandro Baggi <alessandro.baggi@gmail.com> - 2020-05-01 12:40 +0200
              Re: Backup ideas Default User <hunguponcontent@gmail.com> - 2020-05-04 03:30 +0200

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