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Author SHA1 Message Date
Alex Auvolat
07e6bcde85
Merge branch 'main' into lx-perf-improvements 2022-09-05 12:40:17 +02:00
Jakub Jirutka
a6e40b75ea Add feature "system-libs" to enable linking against system libraries 
If this feature is enabled, libsodium-sys and zstd-sys will link
dynamically against system-provided libraries instead of building
and linking statically the bundled (possibly outdated and vulnerable)
copies of them. This feature is intended mainly for linux package
maintainers.
 2022-09-03 18:44:34 +02:00
Alex Auvolat
e1751c8a9c
fix clippy 2022-09-02 17:24:26 +02:00
Alex Auvolat
5d4b937a00
Ability to have up to 4 concurrently working resync workers 2022-09-02 17:18:13 +02:00
Alex Auvolat
5e8baa433d
Make BlockManagerLocked fully private again 2022-09-02 16:52:22 +02:00
Alex Auvolat
47be652a1f
block manager: refactor: split resync into separate file 2022-09-02 16:47:15 +02:00
Alex Auvolat
943d76c583
Ability to dynamically set resync tranquility 2022-09-02 15:34:21 +02:00
Alex Auvolat
99b532b85b
Apply PRIO_SECONDARY to block data transfers 2022-09-01 16:35:43 +02:00
Alex Auvolat
df094bd807
Less strict timeouts 2022-09-01 16:30:44 +02:00
Alex Auvolat
bc977f9a7a
Update to Netapp with OrderTag support and exploit OrderTags 2022-09-01 12:58:20 +02:00
Alex Auvolat
70231d68b2
Fix bytes_read counter 2022-08-31 19:44:27 +02:00
Alex Auvolat
e935861854
Factor out node request order selection logic & use in manager 2022-07-29 12:25:03 +02:00
Alex Auvolat
605a630333
Use streaming in block manager 2022-07-29 12:25:02 +02:00
Alex Auvolat
8e7e680afe
First adaptation to WIP netapp with streaming body 2022-07-29 12:25:02 +02:00
Alex Auvolat
2f111e6b3d
Performance improvements: 
- reduce contention on mutation_lock by having 256 of them
- better lmdb defaults
 2022-07-29 12:24:48 +02:00
Alex Auvolat
1b2e1296eb
Compute hashes on dedicated threads 2022-07-29 12:24:44 +02:00
Alex
4f38cadf6e Background task manager (#332) 
- [x] New background worker trait
- [x] Adapt all current workers to use new API
- [x] Command to list currently running workers, and whether they are active, idle, or dead
- [x] Error reporting
- Optimizations
  - [x] Merkle updater: several items per iteration
  - [ ] Use `tokio::task::spawn_blocking` where appropriate so that CPU-intensive tasks don't block other things going on
- scrub:
  - [x] have only one worker with a channel to start/pause/cancel
  - [x] automatic scrub
  - [x] ability to view and change tranquility from CLI
  - [x] persistence of a few info
- [ ] Testing

Co-authored-by: Alex Auvolat <alex@adnab.me>
Reviewed-on: Deuxfleurs/garage#332
Co-authored-by: Alex <alex@adnab.me>
Co-committed-by: Alex <alex@adnab.me>
 2022-07-08 13:30:26 +02:00
Alex
b44d3fc796 Abstract database behind generic interface and implement alternative drivers (#322) 
- [x] Design interface
- [x] Implement Sled backend
  - [x] Re-implement the SledCountedTree hack ~~on Sled backend~~ on all backends (i.e. over the abstraction)
- [x] Convert Garage code to use generic interface
- [x] Proof-read converted Garage code
- [ ] Test everything well
- [x] Implement sqlite backend
- [x] Implement LMDB backend
- [ ] (Implement Persy backend?)
- [ ] (Implement other backends? (like RocksDB, ...))
- [x] Implement backend choice in config file and garage server module
- [x] Add CLI for converting between DB formats
- Exploit the new interface to put more things in transactions
  - [x] `.updated()` trigger on Garage tables

Fix #284

**Bugs**

- [x] When exporting sqlite, trees iterate empty??
- [x] LMDB doesn't work

**Known issues for various back-ends**

- Sled:
  - Eats all my RAM and also all my disk space
  - `.len()` has to traverse the whole table
  - Is actually quite slow on some operations
  - And is actually pretty bad code...
- Sqlite:
  - Requires a lock to be taken on all operations. The lock is also taken when iterating on a table with `.iter()`, and the lock isn't released until the iterator is dropped. This means that we must be VERY carefull to not do anything else inside a `.iter()` loop or else we will have a deadlock! Most such cases have been eliminated from the Garage codebase, but there might still be some that remain. If your Garage-over-Sqlite seems to hang/freeze, this is the reason.
  - (adapter uses a bunch of unsafe code)
- Heed (LMDB):
  - Not suited for 32-bit machines as it has to map the whole DB in memory.
  - (adpater uses a tiny bit of unsafe code)

**My recommendation:** avoid 32-bit machines and use LMDB as much as possible.

**Converting databases** is actually quite easy. For example from Sled to LMDB:

```bash
cd src/db
cargo run --features cli --bin convert -- -i path/to/garage/meta/db -a sled -o path/to/garage/meta/db.lmdb -b lmdb
```

Then, just add this to your `config.toml`:

```toml
db_engine = "lmdb"
```

Co-authored-by: Alex Auvolat <alex@adnab.me>
Reviewed-on: Deuxfleurs/garage#322
Co-authored-by: Alex <alex@adnab.me>
Co-committed-by: Alex <alex@adnab.me>
 2022-06-08 10:01:44 +02:00
Alex
5768bf3622 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: Deuxfleurs/garage#293
Co-authored-by: Alex <alex@adnab.me>
Co-committed-by: Alex <alex@adnab.me>
 2022-05-10 13:16:57 +02:00
Alex Auvolat
cb5836d53c Bring maximum exponential backoff time down from 16h to 1h 2022-04-07 11:49:29 +02:00
Alex Auvolat
913f7754bb
Add blocks in errored state to garage stats 2022-03-28 15:47:23 +02:00
Alex Auvolat
3dc9214172
Add lots of comments on how the resync queue works 
(I don't really want to change/refactor that code though)
 2022-03-23 10:25:39 +01:00
Alex Auvolat
e480aaf338
Make background tranquility a configurable parameter 2022-03-23 10:25:19 +01:00
Alex Auvolat
8fd6745745
Move block RC code to separate rc.rs 2022-03-23 10:25:19 +01:00
Alex Auvolat
c3982a90b6
Move DataBlock out of manager.rs 2022-03-23 10:25:19 +01:00
Alex Auvolat
c1d9854d2c
Move block manager to separate module 2022-03-23 10:25:15 +01:00