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S3-compatible object store for small self-hosted geo-distributed deployments https://garagehq.deuxfleurs.fr/
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Alex 5768bf3622
continuous-integration/drone/push Build is passing Details
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
doc First implementation of K2V (#293) 2022-05-10 13:16:57 +02:00
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README.md

Garage Build Status

Garage logo

[ Website and documentation | Binary releases | Git repository | Matrix channel ]

Garage is a lightweight S3-compatible distributed object store, with the following goals:

  • As self-contained as possible
  • Easy to set up
  • Highly resilient to network failures, network latency, disk failures, sysadmin failures
  • Relatively simple
  • Made for multi-datacenter deployments

Non-goals include:

  • Extremely high performance
  • Complete implementation of the S3 API
  • Erasure coding (our replication model is simply to copy the data as is on several nodes, in different datacenters if possible)

Our main use case is to provide a distributed storage layer for small-scale self hosted services such as Deuxfleurs.