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backup-strategy: note the measured nightly cost

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Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Julien Lutran
2026-08-29 05:10:15 +02:00
co-authored by Claude Fable 5
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@@ -10,7 +10,7 @@ docs; this page is the map.
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| **local replication** | `incus copy --refresh` → pool `backup` on ks4's second disk (sdb) | instances, against losing the `data` pool | | **local replication** | `incus copy --refresh` → pool `backup` on ks4's second disk (sdb) | instances, against losing the `data` pool |
| **remote replication** | nuc pulls the same replicas over WireGuard → pool `ks4backup` | instances, against losing ks4 or the site | | **remote replication** | nuc pulls the same replicas over WireGuard → pool `ks4backup` | instances, against losing ks4 or the site |
| **remote backup** | **restic** → S3 bucket `restic-data`: database dumps + selected filesystem trees | the data itself, versioned and encrypted, independent of every disk above | | **remote backup** | **restic** → S3 bucket `restic-data`: database dumps + selected filesystem trees | the data itself, versioned and encrypted, independent of every disk above (a nightly run walks 1.1 M files / 1.24 TiB in under two minutes) |
Only two tools are involved: `incus copy` (ZFS-incremental, native to Only two tools are involved: `incus copy` (ZFS-incremental, native to
the platform — a restore is `incus start`) and restic (dedup + the platform — a restore is `incus start`) and restic (dedup +