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How to Create a Backup Strategy - Complete Beginner's Guide

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How to Create a Backup Strategy - Complete Beginner’s Guide

Question: How do I create an effective backup strategy?

Answer: Follow the 3-2-1 Rule

Understanding the 3-2-1 Backup Rule

What is 3-2-1?

  • 3 copies of your data
  • 2 different storage types
  • 1 copy offsite

Why It Works

This rule ensures you have redundant copies. If one storage fails, you have backups in other locations.

How to Implement 3-2-1

Step 1: Identify Primary Data

# List all VMs and containers to backup
qm list
pct list

Step 2: Create 3 Copies Locally

# Copy 1: Primary storage
vzdump --mode snapshot --vmid 100 --storage local
 
# Copy 2: Different storage type
vzdump --mode snapshot --vmid 100 --storage nfs-backup
 
# Copy 3: External USB
vzdump --mode snapshot --vmid 100 --storage usb-backup

Step 3: Set Up Offsite Backup

# Option A: rsync to remote server
rsync -avz /var/lib/vz/dump/ user@remote:/backup/
 
# Option B: Cloud backup
rclone sync /var/lib/vz/dump/ cloud:backup-bucket

Complete Strategy Example

Daily Backups (Copies 1 & 2)

# Job 1: Local storage
# Job 2: NFS storage
# Schedule: Daily at 2 AM

Weekly Backup (Copy 3)

# Job 3: USB drive
# Schedule: Sunday at 3 AM
# Remove USB after backup for security

Monthly Offsite

# rsync to remote on 1st of month
0 3 1 * * rsync -avz /var/lib/vz/dump/ user@remote:/backup/

Keywords

backup-strategy how-to 321-rule beginner planning

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