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Add design and user documentation for the restic tag command

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Pauline Middelink 2017-03-05 19:06:06 +01:00 committed by Alexander Neumann
parent 1fa2313aef
commit be15a9261a
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16
doc/Design.md
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@ -285,7 +285,7 @@ This way, the password can be changed without having to re-encrypt all data.
Snapshots
---------
A snapshots represents a directory with all files and sub-directories at a
A snapshot represents a directory with all files and sub-directories at a
given point in time. For each backup that is made, a new snapshot is created. A
snapshot is a JSON document that is stored in an encrypted file below the
directory `snapshots` in the repository. The filename is the storage ID. This
@ -304,12 +304,22 @@ enter password for repository:
"hostname": "kasimir",
"username": "fd0",
"uid": 1000,
"gid": 100
"gid": 100,
"tags": [
"NL"
],
"original": "251c2e5841355f743f9d4ffd3260bee765acee40a6229857e32b60446991b837"
}
```
Here it can be seen that this snapshot represents the contents of the directory
`/tmp/testdata`. The most important field is `tree`.
`/tmp/testdata` after its tags were changed to "NL". The most important field
is `tree`.
Another important field is `original`, if any modification is made to the
snapshot, say because its tags changed, its SHA-256 hash changes and therefore
the original snapshot id is lost. Retaining a stable id is especially important
for caching.
All content within a restic repository is referenced according to its SHA-256
hash. Before saving, each file is split into variable sized Blobs of data. The

29
doc/Manual.md
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@ -73,6 +73,7 @@ Available Commands:
rebuild-index build a new index file
restore extract the data from a snapshot
snapshots list all snapshots
tag modifies tags on snapshots
unlock remove locks other processes created
version Print version information
@ -394,6 +395,34 @@ enter password for repository:
*eb78040b username kasimir 2015-08-12 13:29:57
```
# Manage tags
Managing tags on snapshots is simple. The existing set of tags can be either
replaced completely, added to or removed from. The result is directly visible
in the `snapshots` command.
```console
$ restic -r /tmp/backup tag --set NL,CH 590c8fc8
Create exclusive lock for repository
Modified tags on 1 snapshots
```
Note the snapshot ID has changed, so between each change we need to look up
the new ID of the snapshot. But there is an even better way, the `tag` command
accepts `--tag`, so we can filter snapshots based on the tag we just added.
```console
$ restic -r /tmp/backup tag --tag NL --remove CH
Create exclusive lock for repository
Modified tags on 1 snapshots
$ restic -r /tmp/backup tag --tag NL --add UK
Create exclusive lock for repository
Modified tags on 1 snapshots
$ restic -r /tmp/backup tag --tag NL --remove NL
Create exclusive lock for repository
Modified tags on 1 snapshots
$ restic -r /tmp/backup tag --tag NL --add SOMETHING
No snapshots were modified
```
# Check integrity and consistency
Imagine your repository is saved on a server that has a faulty hard drive, or