<b>Seven days of retention is how you faithfully back up corruption you can't see yet.</b>

<b>Seven days of retention is how you faithfully back up corruption you can't see yet.</b>
Malware, a silent schema bug, a poisoned ad-injection — they sit quiet for weeks. If your oldest backup is 7 days old, every copy you own already contains the rot.
You need a ladder: hourly for a day, daily for a month, monthly for a year. Grandfather-father-son, not a single rolling window.
Short retention optimizes for the disaster you'll notice in an hour, and guarantees you for the one you notice in a month.
If you can't restore to before last month's hack, you can't recover. Change my mind.