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priority 1
----------
- [x] add deltaEncode chunks function
- [x] do not merge consecutive smaller chunks as these could be stored as chunks if no similar chunk is found. Thus it will need to be of `chunkSize` or less. Otherwise it could not be possibly used for deduplication.
```
for each new chunk:
find similar in sketchMap
if exists:
delta encode
else:
calculate fingerprint
store in fingerprintMap
store in sketchMap
```
- [ ] read from repo (Restore function)
- [x] store recipe
- [x] load recipe
- [x] read chunks in-order into a stream
- [ ] read individual files
- [ ] properly store informations to be DNA encoded
- [ ] tar source to keep files metadata ?
- [ ] store chunks compressed
- [ ] compress before storing
- [ ] uncompress before loading
- [ ] store compressed chunks into tracks of trackSize (1024o)
- [x] add chunk cache... what was it for again ??
- [x] better tests for `(*Repo).Commit`
priority 2
----------
- [x] use more the `Reader` API (which is analoguous to the `IOStream` in Java)
- [ ] refactor matchStream as right now it is quite complex
- [x] better test for `(*Repo).matchStream`
- [ ] tail packing of PartialChunks (this Struct does not exist yet as it is in fact just `TempChunks` for now)
- [ ] option to commit without deltas to save new base chunks
réunion 7/09
------------
- [ ] save recipe consecutive chunks as extents
- [ ] store recipe and files incrementally
- [ ] compress recipe
- [ ] make size comparision between recipe and chunks with some datasets
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