I need same help on taking backup my production server to staging server using rsync and i have around 25gb of data which my production which get added 200mb every day.
1 it has to incremental 2 we are using centos 4.X 3 with 8gb ram 2tg hdd
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For backups, I recommend rdiff-backup. It's fairly comprehensive, fast, and does incremental backups very easily.
It's freely available, but I don't know if there are any premade CentOS packages for it.
rsync can also be used, (rdiff-backup already uses librsync) but rsync doesen't store the increments it transfers. With rsync you can easily keep a copy of your data, but you can't easily keep the change history of your data.
The rsync docs have an example that might do what you want: http://rsync.samba.org/examples.html