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@ -7,49 +7,93 @@
* Proxy Cafe: the backup edition * Proxy Cafe: the backup edition
* *
volevo trovare un meme sulle torri gemelle, magari collegato al fatto che in No better day to talk about disaster recovery
università avevo due tower computers, uno backup dell'altro, che chiamavo
proprio "le torri gemelle".
Comunque, edgyness a parte, la realtà spesso mema più di quanto ci aspettiamo. [[https://old.reddit.com/r/AskHistorians/comments/176wcxp/what_important_data_documents_or_information_was/][1]] [[https://old.reddit.com/r/sysadmin/comments/16fw1j4/how_did_911_affect_you_as_a_sysadmin/][2]] [[https://old.reddit.com/r/sysadmin/comments/d3a3ei/911_it_story/][3]]
Storia su come i sistemi di backup di una torre, stessero sull'altra.
Oh well, the sysadmins didn't receive a call from the C suites that morning anyway * What is a backup
#+BEGIN_NOTES - not "DCIM2568 - Copy.jpg"
* Scaletta - not a snapshot
- my 9/11 moment - not an archive
- the guy made fun of me
- spiega il problema
- elenca i dispositivi
- elenca i possibili files
- categorizza i files
- frequenza
- possibilità:
+ rolling windows
+ incrementale
+ deduplicazione
+ sincronizzazione (no backup)
+ encryption
- soluzioni software
- vedi soluzioni software
- categorizza soluzioni software?
- 3 2 1 rule
- try to restore
- what about databases and similar IO heavy software?
- soluzioni hardware
- cloud, sì o no?
- backblaze, sì o no?
- nas, sì o no?
- elettricità
- come risparmiare
- come scegliere hdd
- raid? (lol)
- parte tecnica sui file systems #+ATTR_REVEAL: :frag (roll-in)
- bonus, what should we backup but we think it's always available? The only defense against:
#+END_NOTES
* reddit #+ATTR_REVEAL: :frag (roll-in)
https://old.reddit.com/r/sysadmin/comments/16fw1j4/how_did_911_affect_you_as_a_sysadmin/ - hardware failure, theft, loss
https://old.reddit.com/r/AskHistorians/comments/176wcxp/what_important_data_documents_or_information_was/
https://old.reddit.com/r/sysadmin/comments/d3a3ei/911_it_story/ #+ATTR_REVEAL: :frag (roll-in)
- [[https://lezzo.org/copypasta/#rotational-velocidensity][+Rotational Velocidensity+]] bit rot
#+ATTR_REVEAL: :frag (roll-in)
- ransomware infections
** Code red stories
[[./batman.jpg]]
** What do you need to backup?
#+ATTR_REVEAL: :frag (roll-in)
- your laptop
- your server
- your mobile phone
- your work laptop
**
[[./bus.jpg]]
*
Not all files are created equal
**
It's a matter of life or death
[[./chrome.jpg]]
**
Press F to pay respect
[[./borderlands.png]]
**
I cry but I'll live
[[./please_seed.png]]
**
You forgot you are supposed to be an adult
[[./uk.png]]
**
Bonus: things that you suppose are always available
*
Software features
- Versioning
- Incremental backups
- Deduplication
- Compression
- Encryption on transport
- Encryption at rest
- Error correction
- Consistency
**
What about the hardware?
#+ATTR_REVEAL: :frag (roll-in)
- 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)
**
[[./terra.jpg]]
**
Things that get confused for backups
- file synchronization
- raids
* A few rule of thumbs
**
Either you save money or you save data
[[./dropbox.png]]
**
The 3-2-1 rule
**
Always test your backups
[[./spongebob-haiku.jpg]]
**
Go low tech
[[./collage.png]]

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