From b44d3fc796484a50cd6854f20c9b46e5fddedc9d Mon Sep 17 00:00:00 2001 From: Alex Date: Wed, 8 Jun 2022 10:01:44 +0200 Subject: 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 Reviewed-on: https://git.deuxfleurs.fr/Deuxfleurs/garage/pulls/322 Co-authored-by: Alex Co-committed-by: Alex --- src/model/migrate.rs | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'src/model/migrate.rs') diff --git a/src/model/migrate.rs b/src/model/migrate.rs index 7e61957a..25acb4b0 100644 --- a/src/model/migrate.rs +++ b/src/model/migrate.rs @@ -25,11 +25,15 @@ impl Migrate { .open_tree("bucket:table") .map_err(GarageError::from)?; - for res in tree.iter() { + let mut old_buckets = vec![]; + for res in tree.iter().map_err(GarageError::from)? { let (_k, v) = res.map_err(GarageError::from)?; let bucket = rmp_serde::decode::from_read_ref::<_, old_bucket::Bucket>(&v[..]) .map_err(GarageError::from)?; + old_buckets.push(bucket); + } + for bucket in old_buckets { if let old_bucket::BucketState::Present(p) = bucket.state.get() { self.migrate_buckets050_do_bucket(&bucket, p).await?; } -- cgit v1.2.3 From 77e3fd6db2c9cd3a10889bd071e95ef839cfbefc Mon Sep 17 00:00:00 2001 From: Alex Date: Wed, 15 Jun 2022 20:20:28 +0200 Subject: improve internal item counter mechanisms and implement bucket quotas (#326) - [x] Refactoring of internal counting API - [x] Repair procedure for counters (it's an offline procedure!!!) - [x] New counter for objects in buckets - [x] Add quotas to buckets struct - [x] Add CLI to manage bucket quotas - [x] Add admin API to manage bucket quotas - [x] Apply quotas by adding checks on put operations - [x] Proof-read Co-authored-by: Alex Auvolat Reviewed-on: https://git.deuxfleurs.fr/Deuxfleurs/garage/pulls/326 Co-authored-by: Alex Co-committed-by: Alex --- src/model/migrate.rs | 1 + 1 file changed, 1 insertion(+) (limited to 'src/model/migrate.rs') diff --git a/src/model/migrate.rs b/src/model/migrate.rs index 25acb4b0..5fc67069 100644 --- a/src/model/migrate.rs +++ b/src/model/migrate.rs @@ -77,6 +77,7 @@ impl Migrate { local_aliases: LwwMap::new(), website_config: Lww::new(website), cors_config: Lww::new(None), + quotas: Lww::new(Default::default()), }), }) .await?; -- cgit v1.2.3 From 0f5689c16920479066277db2880e2ca87f7ca602 Mon Sep 17 00:00:00 2001 From: Alex Auvolat Date: Tue, 6 Sep 2022 17:52:50 +0200 Subject: Include code from v0.5.1 directly to remove dependencies --- src/model/migrate.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'src/model/migrate.rs') diff --git a/src/model/migrate.rs b/src/model/migrate.rs index 5fc67069..cd6ad26a 100644 --- a/src/model/migrate.rs +++ b/src/model/migrate.rs @@ -5,7 +5,7 @@ use garage_util::data::*; use garage_util::error::Error as GarageError; use garage_util::time::*; -use garage_model_050::bucket_table as old_bucket; +use crate::prev::v051::bucket_table as old_bucket; use crate::bucket_alias_table::*; use crate::bucket_table::*; -- cgit v1.2.3