[Cialug] Backups with rsync

[Dave J. Hala Jr.]

You could rsync the nightly backup onto a differant machine and that
would have the same effect.

On Sun, 2005-02-20 at 13:37, Jonathan Bailey wrote:
> True. I can do full nightly backups (about 1.2GB each at the moment). 
> Right now they're stored on a different drive in the same server. I also 
> want to have an off site snapshot (don't need each nights backup - just 
> the most current snapshot). My remote machine is on a 1.5mbit (DSL) 
> connection. If I rsync /backup/backup-[currentdate]/ to 
> /remotemachine/backup/ every night, will that give me a current snapshot?
> 
> 
> Jon
> 
> Dave J. Hala Jr. wrote:
> 
> >I've never been a fan of incremental backups. Ever do a complete restore
> >from a daily incremental backup set? If one of the backup sets is bad,
> >you can be hosed.
> >
> >For what a cheap ide drive costs nowadays, you might as well just do a
> >full backup every night and save yourself the headache. If you are
> >worried about the "reliability" of the cheap ide drives, use two or
> >three or four of them with software raid...
> >
> >Depending on how large your backup files are, you may be able to also
> >store them on the CD/RW's or DVD/RW's and rotate the media out weekly,
> >taking a copy off-site.
> >
> >If they are truly "mission" critical backups, the cost of the back-up
> >system shouldn't be a factor. (It just needs to be reasonable) It just
> >needs to be reliable and able to be restored quickly. 
> >
> >
> >
> >:) Dave
> >
> >
> >On Sun, 2005-02-20 at 10:06, Jonathan Bailey wrote:
> >  
> >
> >>I want to do incremental backups since they take less disk space in the 
> >>end (full backups every Sunday for example). I'd then like to rsync 
> >>those backups to another server. This is what I'm using for incremental 
> >>backups now - it's not perfect, but I'm lookign for better.
> >>
> >> rsync -av --exclude-from=/root/rs.exclude 
> >>--compare-dest=/backup/backup-$WEK/ /home/ 
> >>/backup/backup-$WEK-$DATESTAMP/ > /backup/backup-$WEK-$DATESTAMP.log
> >>
> >>
> >>
> >>Jon
> >>
> >>
> >>
> >>Academician Kula wrote:
> >>
> >>    
> >>
> >>>On Sat, Feb 19, 2005 at 08:21:08PM -0600, Jonathan Bailey wrote:
> >>> 
> >>>
> >>>      
> >>>
> >>>>I'm currently using rsync to do a backup every night. I'd like to do 
> >>>>incremental backups, just storing the changed files every backup cycle. 
> >>>>I'm thinking of a full backup on Sunday, and incremental every other day 
> >>>>of the week. I know you can use --link-dest with rsync, but I don't want 
> >>>>all the hard links. How can I make it back up only the changed files 
> >>>>(and structure)?
> >>>>   
> >>>>
> >>>>        
> >>>>
> >>>You might use find with the appropriate options to find all files
> >>>changed since a certain time, and feed that list to rsync. Newer
> >>>versions of rsync have a --files-from flag, which just takes a list
> >>>of files to copy.   
> >>>
> >>>I am curious why you don't want hard links --- I've been using rsync
> >>>with hard links to do backups for a while now and it seems to work
> >>>well for me. Knowing a bit more about your situation may give us ideas
> >>>for you to try.    
> >>>
> >>>
> >>>
> >>> 
> >>>
> >>>      
> >>>
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> >>    
> >>
> 
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Dave J. Hala Jr. <dave@osis.us>
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