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Kenneth Skovhede 9 years ago
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  1. 126
      _posts/articles/2016-10-14-Backup-Process.md

126
_posts/articles/2016-10-14-Backup-Process.md
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@ -74,8 +74,8 @@ When Duplicati recieves the first entry, `C:\data\`, it notices that the entry i
```json ```json
[ [
{ {
"type": "folder", "type": "folder",
"path": "C:\\data\\" "path": "C:\\data\\"
} }
] ]
``` ```
@ -98,17 +98,17 @@ qaFXpxVTuYCuibb9P41VSeVn4pIaK8o3jUpJKqI4VF4= (4kb)
The file is then added to `filelist.json`, which now looks like this: The file is then added to `filelist.json`, which now looks like this:
``` ```json
[ [
{ {
"type": "Folder", "type": "Folder",
"path": "C:\\data\\" "path": "C:\\data\\"
}, },
{ {
"type": "File", "type": "File",
"path": "C:\\data\\mydoc.txt", "path": "C:\\data\\mydoc.txt",
"size": 4096, "size": 4096,
"hash": "qaFXpxVTuYCuibb9P41VSeVn4pIaK8o3jUpJKqI4VF4=" "hash": "qaFXpxVTuYCuibb9P41VSeVn4pIaK8o3jUpJKqI4VF4="
} }
] ]
``` ```
@ -130,7 +130,7 @@ Additionally, a file hash is computed, but unlike a small file, the file hash is
We could choose to store these values directly in `filelist.json`, for example: We could choose to store these values directly in `filelist.json`, for example:
``` ```json
{ {
"type": "File", "type": "File",
"path": "C:\\data\\myvideo.mp4", "path": "C:\\data\\myvideo.mp4",
@ -162,24 +162,24 @@ Uo1f4rVjNRX10HkxQxXauCrRv0wJOvStqt9gaUT0uPA= (96b)
The new file entry is then stored in filelist, which then looks like: The new file entry is then stored in filelist, which then looks like:
``` ```json
[ [
{ {
"type": "Folder", "type": "Folder",
"path": "C:\\data\\" "path": "C:\\data\\"
}, },
{ {
"type": "File", "type": "File",
"path": "C:\\data\\mydoc.txt", "path": "C:\\data\\mydoc.txt",
"size": 4096, "size": 4096,
"hash": "qaFXpxVTuYCuibb9P41VSeVn4pIaK8o3jUpJKqI4VF4=" "hash": "qaFXpxVTuYCuibb9P41VSeVn4pIaK8o3jUpJKqI4VF4="
}, },
{ {
"type": "File", "type": "File",
"path": "C:\\data\\myvideo.mp4", "path": "C:\\data\\myvideo.mp4",
"size": 215040, "size": 215040,
"hash": "4sGwVN/QuWHD+yVI10qgYa4e2F5M4zXLKBQaf1rtTCs=", "hash": "4sGwVN/QuWHD+yVI10qgYa4e2F5M4zXLKBQaf1rtTCs=",
"blocklists": [ "Uo1f4rVjNRX10HkxQxXauCrRv0wJOvStqt9gaUT0uPA=" ] "blocklists": [ "Uo1f4rVjNRX10HkxQxXauCrRv0wJOvStqt9gaUT0uPA=" ]
} }
] ]
``` ```
@ -208,34 +208,34 @@ We chose to omit this part based on a number of observations:
This means that an additional entry for `C:\data\extra\olddoc.tx` will occur in `filelist.json`: This means that an additional entry for `C:\data\extra\olddoc.tx` will occur in `filelist.json`:
``` ```json
[ [
{ {
"type": "Folder", "type": "Folder",
"path": "C:\\data\\" "path": "C:\\data\\"
}, },
{ {
"type": "File", "type": "File",
"path": "C:\\data\\mydoc.txt", "path": "C:\\data\\mydoc.txt",
"size": 4096, "size": 4096,
"hash": "qaFXpxVTuYCuibb9P41VSeVn4pIaK8o3jUpJKqI4VF4=" "hash": "qaFXpxVTuYCuibb9P41VSeVn4pIaK8o3jUpJKqI4VF4="
}, },
{ {
"type": "File", "type": "File",
"path": "C:\\data\\myvideo.mp4", "path": "C:\\data\\myvideo.mp4",
"size": 215040, "size": 215040,
"hash": "4sGwVN/QuWHD+yVI10qgYa4e2F5M4zXLKBQaf1rtTCs=", "hash": "4sGwVN/QuWHD+yVI10qgYa4e2F5M4zXLKBQaf1rtTCs=",
"blocklists": [ "Uo1f4rVjNRX10HkxQxXauCrRv0wJOvStqt9gaUT0uPA=" ] "blocklists": [ "Uo1f4rVjNRX10HkxQxXauCrRv0wJOvStqt9gaUT0uPA=" ]
}, },
{ {
"type": "Folder", "type": "Folder",
"path": "C:\\data\\extra" "path": "C:\\data\\extra"
}, },
{ {
"type": "File", "type": "File",
"path": "C:\\data\\extra\\olddoc.txt", "path": "C:\\data\\extra\\olddoc.txt",
"size": 2048, "size": 2048,
"hash": "R/XSNsb4ln/SkeJwFDd4Fv4OnW2QNIxMR4HItgg9qCE=" "hash": "R/XSNsb4ln/SkeJwFDd4Fv4OnW2QNIxMR4HItgg9qCE="
} }
] ]
``` ```
@ -247,41 +247,41 @@ This approach is also known as [deduplication](https://en.wikipedia.org/wiki/Dat
The final contents of `filelist.json` is then: The final contents of `filelist.json` is then:
``` ```json
[ [
{ {
"type": "Folder", "type": "Folder",
"path": "C:\\data\\" "path": "C:\\data\\"
}, },
{ {
"type": "File", "type": "File",
"path": "C:\\data\\mydoc.txt", "path": "C:\\data\\mydoc.txt",
"size": 4096, "size": 4096,
"hash": "qaFXpxVTuYCuibb9P41VSeVn4pIaK8o3jUpJKqI4VF4=" "hash": "qaFXpxVTuYCuibb9P41VSeVn4pIaK8o3jUpJKqI4VF4="
}, },
{ {
"type": "File", "type": "File",
"path": "C:\\data\\myvideo.mp4", "path": "C:\\data\\myvideo.mp4",
"size": 215040, "size": 215040,
"hash": "4sGwVN/QuWHD+yVI10qgYa4e2F5M4zXLKBQaf1rtTCs=", "hash": "4sGwVN/QuWHD+yVI10qgYa4e2F5M4zXLKBQaf1rtTCs=",
"blocklists": [ "Uo1f4rVjNRX10HkxQxXauCrRv0wJOvStqt9gaUT0uPA=" ] "blocklists": [ "Uo1f4rVjNRX10HkxQxXauCrRv0wJOvStqt9gaUT0uPA=" ]
}, },
{ {
"type": "Folder", "type": "Folder",
"path": "C:\\data\\extra" "path": "C:\\data\\extra"
}, },
{ {
"type": "File", "type": "File",
"path": "C:\\data\\extra\\olddoc.txt", "path": "C:\\data\\extra\\olddoc.txt",
"size": 2048, "size": 2048,
"hash": "R/XSNsb4ln/SkeJwFDd4Fv4OnW2QNIxMR4HItgg9qCE=" "hash": "R/XSNsb4ln/SkeJwFDd4Fv4OnW2QNIxMR4HItgg9qCE="
}, },
{ {
"type": "File", "type": "File",
"path": "C:\\data\\extra\\samevideo.mp4", "path": "C:\\data\\extra\\samevideo.mp4",
"size": 215040, "size": 215040,
"hash": "4sGwVN/QuWHD+yVI10qgYa4e2F5M4zXLKBQaf1rtTCs=", "hash": "4sGwVN/QuWHD+yVI10qgYa4e2F5M4zXLKBQaf1rtTCs=",
"blocklists": [ "Uo1f4rVjNRX10HkxQxXauCrRv0wJOvStqt9gaUT0uPA=" ] "blocklists": [ "Uo1f4rVjNRX10HkxQxXauCrRv0wJOvStqt9gaUT0uPA=" ]
}, },
] ]
``` ```

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