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134 commits

Author SHA1 Message Date
Alex Auvolat
9f5419f465
Make K2V item timestamps globally increasing on each node 2023-01-10 11:03:52 +01:00
Alex Auvolat
d6d571d512
cargo fmt 2023-01-03 15:30:21 +01:00
Alex Auvolat
a54b67740d
move debug_serialize to garage_util::encode 2023-01-03 15:29:29 +01:00
Alex Auvolat
8d5505514f
Make it explicit when using nonversioned encoding 2023-01-03 15:27:36 +01:00
Alex Auvolat
426d8784da
cleanup 2023-01-03 15:08:37 +01:00
Alex Auvolat
cdb2a591e9
Refactor how things are migrated 2023-01-03 14:44:47 +01:00
Alex Auvolat
939a6d67e8
Merge branch 'main' into internals-rework 2023-01-02 15:07:44 +01:00
Alex Auvolat
6775569525
Bump everything to v0.8.1 2023-01-02 14:15:33 +01:00
Alex Auvolat
13c8662126
factorize 2022-12-14 16:16:55 +01:00
Alex Auvolat
510b620108
Get rid of background::spawn 2022-12-14 16:08:05 +01:00
Alex Auvolat
dfc131850a
Simplified and more aggressive worker exit logic 2022-12-14 15:25:29 +01:00
Alex Auvolat
d4af27f920
Add missing notify 2022-12-14 13:54:21 +01:00
Alex Auvolat
d56c472712
Refactor background runner and get rid of job worker 2022-12-14 12:51:42 +01:00
Alex Auvolat
2183518edc
Spawn all background workers in a separate step 2022-12-14 12:28:07 +01:00
Alex Auvolat
83c8467e23
Proper queueing for delayed inserts, now backed to disk 2022-12-14 11:58:06 +01:00
Alex Auvolat
f8e528c15d
Small refactor of tables internals 2022-12-14 10:48:49 +01:00
Alex Auvolat
041b60ed1d
Add block.rc_size, table.size and table.merkle_tree_size metrics 2022-12-13 15:54:03 +01:00
Alex Auvolat
d6040e32a6
cli: prettier table in garage stats 2022-12-13 15:43:22 +01:00
Alex Auvolat
687660b27f
Implement block list-errors and block info 2022-12-13 14:23:45 +01:00
Alex Auvolat
de9d6cddf7
Prettier worker list table; remove useless CLI log messages 2022-12-12 17:17:05 +01:00
Alex Auvolat
280d1be7b1
Refactor health check and add ability to return it in json 2022-12-05 15:28:57 +01:00
Alex Auvolat
2065f011ca
Implement /health admin API endpoint to check node health 2022-12-05 14:59:15 +01:00
Alex Auvolat
ad917ffd3f
Fix instant substractions that might have panicked 2022-09-29 15:53:54 +02:00
Alex Auvolat
357b72f4ff
Merge branch 'main' into configurable-timeouts 2022-09-20 15:19:58 +02:00
Alex Auvolat
1f7b050b7d
Change a warn! into a debug! 2022-09-20 11:49:48 +02:00
Alex Auvolat
56592e1853
RPC performance changes 
- configurable ping timeout
- single, much higher, configurable RPC timeout
- no more concurrency semaphore
 2022-09-19 20:31:00 +02:00
Alex Auvolat
44733474bb
Remove/change println! in server code (fix #358) 2022-09-13 16:01:55 +02:00
Alex Auvolat
7f54706b95
Merge branch 'lx-perf-improvements' into netapp-stream-body 2022-09-08 15:50:56 +02:00
Alex Auvolat
48ffaaadfc
Bump versions to 0.8.0 (compatibility is broken already) 2022-09-06 16:47:56 +02:00
Alex Auvolat
df094bd807
Less strict timeouts 2022-09-01 16:30:44 +02:00
Alex Auvolat
8e7e680afe
First adaptation to WIP netapp with streaming body 2022-07-29 12:25:02 +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
0091002ef2
New replication modes and their documentation 2022-03-28 16:26:04 +02:00
Alex Auvolat
2377a92f6b
Add wrapper over sled tree to count items (used for big queues) 2022-03-14 10:54:25 +01:00
Alex Auvolat
203e8d2c34
Bump version to 0.7 because of incompatible Netapp 2022-03-14 10:54:24 +01:00
Alex Auvolat
f869ca625d
Add spans to table calls, change span names in RPC 2022-03-14 10:54:12 +01:00
Alex Auvolat
2a5609b292
Add metrics to API endpoint 2022-03-14 10:53:36 +01:00
Alex Auvolat
818daa5c78
Refactor how durations are measured 2022-03-14 10:53:35 +01:00
Alex Auvolat
8c2fb0c066
Add tracing integration with opentelemetry 2022-03-14 10:52:13 +01:00
Alex Auvolat
2cab84b1fe
Add many metrics in table/ and rpc/ 2022-03-14 10:51:50 +01:00
Maximilien R
1e2cf26373
Implement basic metrics in table 2022-03-14 10:51:17 +01:00
Alex Auvolat
af261e1789 Fix a bug when a migration is followed by a rebalance 
Nodes would stabilize on different encoding formats for the values,
some having the pre-migration format and some having the post-migration
format. This would be reflected in the Merkle trees never converging
and thus having an infinite resync loop.
 2022-02-10 17:38:27 +01:00
Alex Auvolat
ba7f268b99
Rename and change query filters 2022-01-04 12:52:46 +01:00
Alex Auvolat
beeef4758e
Some movement of helper code and refactoring of error handling 2022-01-04 12:52:46 +01:00
Alex Auvolat
d8ab5bdc3e
New buckets for 0.6.0: fix model and migration 2022-01-04 12:47:28 +01:00
Alex Auvolat
5b1117e582
New model for buckets 2022-01-04 12:45:46 +01:00
Alex Auvolat
8f6026de5e
Make table name a const in trait 2021-12-15 15:39:10 +01:00
Alex Auvolat
c94406f428
Improve how node roles are assigned in Garage 
- change the terminology: the network configuration becomes the role
  table, the configuration of a nodes becomes a node's role
- the modification of the role table takes place in two steps: first,
  changes are staged in a CRDT data structure. Then, once the user is
  happy with the changes, they can commit them all at once (or revert
  them).
- update documentation
- fix tests
- implement smarter partition assignation algorithm

This patch breaks the format of the network configuration: when
migrating, the cluster will be in a state where no roles are assigned.
All roles must be re-assigned and commited at once. This migration
should not pose an issue.
 2021-11-16 16:05:53 +01:00