Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Linux Script - Synchronize and keep incremental backup of directories/files

Posted on 2014-02-26
2
883 Views
Last Modified: 2014-03-13
Hi,
I have a site with very active development carried on day-to-day basis. I need to see what files my developer have worked on and need back them up for recovery.
The build of system runs in GB so I don't want to backup all files. Storage is seriously expensive.

I am looking for a linux script to
1. First backup changed files every hour and
2. Then all rsync files from master directory to secondary folder on same or remote server every hour.

Many Thanks
0
Comment
Question by:crazywolf2010
2 Comments
 
LVL 34

Accepted Solution

by:
Seth Simmons earned 250 total points
ID: 39890570
find . -mmin -60 | xargs -I% rsync -tgcop % /bar/%

Open in new window


generally speaking, you would use something like this
you find the files (replace . if you have a specific path and not using current folder)
the mmin -60 is the time specified; searching for anything modified in the last 60 minutes

then filter the results through xargs which will do an rsync to the destination

you can use whatever rsync options you want instead of -tgcop as i used in the example

you can also have multiple rsync processes by adding -P x (something less than 8 for performance reasons) right after xargs though you could leave it out if you have very large files

replace /bar/ with the actual local destination

as far as a remote server is concerned, to automate you would need to setup ssh keys to use without prompting for a password

save it as backup.sh and add cron entry

0 * * * * /path/backup.sh

Open in new window

0
 
LVL 27

Assisted Solution

by:skullnobrains
skullnobrains earned 250 total points
ID: 39893014
rsync can handle the above by itself by using --compare-dest

-------

rsync has an option to do incremental backups by creating hardlinks of files that did not change using --link-dest. it needs a little scripting to be actually usable in cron. here is an example script to handle incremental backups. the script assumes the destination dir to be local but you can adapt differently. it is just simpler to pull rather than push in this context

# set these up
src=/local/dir
dst=/other/dir

test -L $dst.latest && lnk="--link-dest=$dst.latest"
dst_=$dst.`date +%Y%m%d%H%M%S`
if rsync -az $lnk $src $dst_.part
then
  mv $dst_.part $dst_
  ln -sfn $dst_ $dst.latest
else
  echo RSYNC FAILURE, removing synchronised files >&2
  rm -rv $dst_.part
  exit 1
fi

# cleanup previously failed/incomplete synchros
rm -frv $dst*.part | sed 's/^/RM:	/'

Open in new window


-----------

you can also use a combination of --backup and --suffix in order to store everything in a single directory. use the current date as suffix for example.
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Are you looking to recover an email message or a contact you just deleted mistakenly? Or you are searching for a contact that you erased from your MS Outlook ‘Contacts’ folder and now realized that it was important.
Microservice architecture adoption brings many advantages, but can add intricacy. Selecting the right orchestration tool is most important for business specific needs.
This tutorial will walk an individual through locating and launching the BEUtility application to properly change the service account username and\or password in situation where it may be necessary or where the password has been inadvertently change…
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.

829 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question