1. Proxy Cafe: the backup edition

2.

No better day to talk about disaster recovery

1 2 3

3. What is a backup

• not "DCIM2568 - Copy.jpg"
• not a snapshot
• not an archive

The only defense against:

• hardware failure, theft, loss

• Rotational Velocidensity bit rot

• ransomware infections

3.1. Code red stories

3.2. What do you need to backup?

• your laptop
• your server
• your mobile phone
• your work laptop

3.3.

4.

Not all files are created equal

4.1.

It's a matter of life or death

4.2.

Press F to pay respect

4.3.

I cry but I'll live

4.4.

You forgot you are supposed to be an adult

4.5.

Bonus: things that you suppose are always available

5.

Software features

• Versioning
• Incremental backups
• Deduplication
• Compression
• Encryption on transport
• Encryption at rest
• Error correction
• Consistency

5.1.

What about the hardware?

• go to the cloud someone else's computer
• buy a NAS 🤮
• buy a DAS and make a NAS 😎
• buy hard drives and put them under the bed
• dvd blu rays
• tapes (lol)

5.2.

5.3.

Things that get confused for backups

• file synchronization
• raids

6. A few rule of thumbs

6.1.

Either you save money or you save data

6.2.

The 3-2-1 rule

6.3.

Always test your backups

6.4.

Go low tech