System RecoveryĪ bare metal restore plan is simply a plan laid out by a CentOS administrator to get vital systems online with all data intact. Another modern approach may be a cloud backup provider. 1 copy of data offsite we are rotating the USB drives offsite on a nightly basis. We would actually have three different backup mediums in this case: the working copy on an SSD of a laptop or workstation, the CentOS server data on a RADI6 Array, and the offsite backups put on USB drives. 3-2-1 is defined as follows: 3 copies of data for example, we may have the working copy a copy put onto the CentOS server designed for redundancy using rsync and rotated, offsite USB backups are made from data on the backup server. This is a very good approach to live by when implementing a backup plan. Throughout the industry, you'll often hear the term 3-2-1 backup model. The first thing we want to get accustomed to is the 3-2-1 backup rule. Before exploring methods particular to CentOS for deploying a standard backup plan, let's first discuss typical considerations for a standard level backup policy.
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