In order to connect to a remote server you will need to know it’s IP address. Server Configuration Connecting to Server / Setting up SSH If you are backing up to a different computer (using SSH) you will need to get root access without requiring any user input so unless you SSH into the user root (and you shouldn’t) you will have to get creative to deal with file permissions. This is what makes the configuration difficult because rsync can copy user group ids (which may not exist on the server), file attributes (permissions, modification date, extended attributes) and even symlinks (which may be broken on the server until restored). This follows the 3–2–1 Backup Strategy of having 3 copies of data (On client, Primary Server and Replica Server) with 2 being local to you and 1 being offsite.Īn important note about making backups with rsync is that it is generally recommended to backup / as it will allow you to restore a complete data loss by copying all files onto a new device and rebooting. My primary server is located in my house and my replica is offsite. I have 2 backup servers, one is used as my primary (where I will always backup to) and the other as my replica (which will simply copy from the primary on a scheduled interval). I have multiple clients, many of them are not always on (ex: Laptop).
#GRSYNC VS YARG MAC#
I will also assume all of your servers and clients run Linux, this should be trivial to use on a Mac but will require a bit more effort for Windows. Setupįrom this point forward I will refer to a client as a computer being backed up and a server as a computer that is being used to store the backups.
#GRSYNC VS YARG INSTALL#
Keep in mind this script could be cloned to any language if you prefer not to install Node.js on your computers. I will be using Rsync-Snapshot a Node.js script I have written to manage script hooks (before and after backup), logging, deleting old increments and restores. This article will go through my setup with multiple computers backing up to two backup servers. Implementing this with rsync is fairly trivial, especially with the -link-from parameter however the system configuration is not. If data is changed we transfer the changes (file deltas) then recreate the file from the downloaded changes and unchanged parts on the disk. Essentially this takes advantage of hard links (linking to the inode of a file instead of duplicating its data) if data is unchanged between backups.
#GRSYNC VS YARG HOW TO#
These guides detail the methodology behind how to create increments with rsync. Two useful ones are: Snapshot Backup - Arch Linux Wiki and Do It Yourself Backup System Using Rsync. Guides already exist online detailing this idea.
With configuration and scripting it can also be great for creating backups and even incremental snapshots (using methods similar to Apple’s Time Machine). These locations can be on the same physical computer (on the same disk or different disks) or can be on different computers (using SSH connections). Rsync is a tool which allows users to “mirror” files between two locations.
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