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* Abstract database behind generic interface and implement alternative drivers ↵Alex2022-06-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | (#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: https://git.deuxfleurs.fr/Deuxfleurs/garage/pulls/322 Co-authored-by: Alex <alex@adnab.me> Co-committed-by: Alex <alex@adnab.me>
* Add a K2V client library and CLI (#303)trinity-1686a2022-05-181-0/+1
| | | | | | | | | lib.rs could use getting split in modules, but I'm not sure how exactly Co-authored-by: trinity-1686a <trinity@deuxfleurs.fr> Reviewed-on: https://git.deuxfleurs.fr/Deuxfleurs/garage/pulls/303 Co-authored-by: trinity-1686a <trinity.pointard@gmail.com> Co-committed-by: trinity-1686a <trinity.pointard@gmail.com>
* Add wrapper over sled tree to count items (used for big queues)Alex Auvolat2022-03-141-0/+1
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* Refactor how durations are measuredAlex Auvolat2022-03-141-0/+1
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* Add tracing integration with opentelemetryAlex Auvolat2022-03-141-1/+1
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* Improve how node roles are assigned in Garagev0.5-beta1Alex Auvolat2021-11-161-0/+1
| | | | | | | | | | | | | | | | | - 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.
* Add tranquilizer mechanism to improve on token bucket mechanismtranquilityAlex Auvolat2021-11-041-0/+1
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* Refactoring on repair commandscli-verify-integrityAlex Auvolat2021-10-271-0/+1
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* rename types to CamelCaseTrinity Pointard2021-05-031-1/+0
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* fix clippy warnings on util and rpcTrinity Pointard2021-05-031-0/+1
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* make most requested changesTrinity Pointard2021-04-271-1/+0
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* document util crateTrinity Pointard2021-04-271-0/+3
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* Improve bootstraping: do it regularly; persist peer listAlex Auvolat2021-04-271-0/+1
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* Time and metadata improvementsAlex Auvolat2021-03-151-0/+1
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* Split code for modular compilationAlex Auvolat2020-04-241-0/+7