Our business requires 7x24 computer access with minimal downtime when the server fails.
I have 3 backup computers.
1st - next to the main computer.
2nd- at the other end of the building.
3-rd at my house.
hourly all our data files are rsynced to the 3 backup servers. This takes 1-3 min.
also 2x per hour our main data files are synced. this takes < 2 min.
Rsync is a great program for backup as it sends just the parts of the file which changed.
In addition we use dds-4 tape to backup 1x per day. the tape is taken offsite.
So use rsync over ethernet to backup to a spare computer or 2.
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