garage/src/util
Alex 5768bf3622
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First implementation of K2V (#293)
**Specification:**

View spec at [this URL](https://git.deuxfleurs.fr/Deuxfleurs/garage/src/branch/k2v/doc/drafts/k2v-spec.md)

- [x] Specify the structure of K2V triples
- [x] Specify the DVVS format used for causality detection
- [x] Specify the K2V index (just a counter of number of values per partition key)
- [x] Specify single-item endpoints: ReadItem, InsertItem, DeleteItem
- [x] Specify index endpoint: ReadIndex
- [x] Specify multi-item endpoints: InsertBatch, ReadBatch, DeleteBatch
- [x] Move to JSON objects instead of tuples
- [x] Specify endpoints for polling for updates on single values (PollItem)

**Implementation:**

- [x] Table for K2V items, causal contexts
- [x] Indexing mechanism and table for K2V index
- [x] Make API handlers a bit more generic
- [x] K2V API endpoint
- [x] K2V API router
- [x] ReadItem
- [x] InsertItem
- [x] DeleteItem
- [x] PollItem
- [x] ReadIndex
- [x] InsertBatch
- [x] ReadBatch
- [x] DeleteBatch

**Testing:**

- [x] Just a simple Python script that does some requests to check visually that things are going right (does not contain parsing of results or assertions on returned values)
- [x] Actual tests:
  - [x] Adapt testing framework
  - [x] Simple test with InsertItem + ReadItem
  - [x] Test with several Insert/Read/DeleteItem + ReadIndex
  - [x] Test all combinations of return formats for ReadItem
  - [x] Test with ReadBatch, InsertBatch, DeleteBatch
  - [x] Test with PollItem
  - [x] Test error codes
- [ ] Fix most broken stuff
  - [x] test PollItem broken randomly
  - [x] when invalid causality tokens are given, errors should be 4xx not 5xx

**Improvements:**

- [x] Descending range queries
  - [x] Specify
  - [x] Implement
  - [x] Add test
- [x] Batch updates to index counter
- [x] Put K2V behind `k2v` feature flag

Co-authored-by: Alex Auvolat <alex@adnab.me>
Reviewed-on: #293
Co-authored-by: Alex <alex@adnab.me>
Co-committed-by: Alex <alex@adnab.me>
2022-05-10 13:16:57 +02:00
..
crdt Implement {Put,Get,Delete}BucketCors and CORS in general 2022-01-24 11:58:00 +01:00
background.rs run cargo fmt on util and make missing doc warning 2021-04-27 16:37:10 +02:00
Cargo.toml First implementation of K2V (#293) 2022-05-10 13:16:57 +02:00
config.rs First implementation of K2V (#293) 2022-05-10 13:16:57 +02:00
data.rs Remove ... at end of hex IDs 2022-03-14 10:52:31 +01:00
error.rs First implementation of K2V (#293) 2022-05-10 13:16:57 +02:00
lib.rs Add wrapper over sled tree to count items (used for big queues) 2022-03-14 10:54:25 +01:00
metrics.rs Add metrics to web endpoint 2022-03-14 10:53:50 +01:00
persister.rs fix clippy warnings on util and rpc 2021-05-03 22:11:41 +02:00
sled_counter.rs Implement exponential backoff for resync retries 2022-03-14 11:41:20 +01:00
time.rs New buckets for 0.6.0: small fixes, including: 2022-01-04 12:46:41 +01:00
token_bucket.rs Refactoring on repair commands 2021-10-27 11:14:55 +02:00
tranquilizer.rs Add tranquilizer mechanism to improve on token bucket mechanism 2021-11-04 13:26:59 +01:00