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docs(backups): add cache for a VM

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Julien Fontanet
2022-09-20 14:54:47 +01:00
parent 46fe3be322
commit 2a71e28253
1 changed files with 13 additions and 1 deletions
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@xen-orchestra/backups/docs/VM backups/README.md
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@@ -21,7 +21,7 @@
└─ xo-vm-backups
├─ index.json // TODO
└─ <VM UUID>
├─ index.json // TODO
├─ cache.json.gz
├─ vdis
│ └─ <job UUID>
│ └─ <VDI UUID>
@@ -45,6 +45,18 @@ When `useVhdDirectory` is enabled on the remote, the directory containing the VH
└─ <uuid>.vhd
```
## Cache for a VM
In a VM directory, if the file `cache.json.gz` exists, it contains the metadata for all the backups for this VM.
Add the following file: `xo-vm-backups/<VM UUID>/cache.json.gz`.
This cache is compressed in Gzip and contains an JSON object with the metadata for all the backups of this VM indexed by their absolute path (i.e. `/xo-vm-backups/<VM UUID>/<timestamp>.json`).
This file is generated on demande when listing the backups, and directly updated on backup creation/deletion.
In case any incoherence is detected, the file is deleted so it will be fully generated when required.
## Attributes
### Of created snapshots