Upgrade fjall to 2.4, add option to set block cache size

Cargo.lock

@@ -1042,6 +1042,20 @@ dependencies = [
  "num_cpus",
 ]
 
+[[package]]
+name = "dashmap"
+version = "6.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5041cc499144891f3790297212f32a74fb938e5136a14943f338ef9e0ae276cf"
+dependencies = [
+ "cfg-if",
+ "crossbeam-utils",
+ "hashbrown 0.14.3",
+ "lock_api",
+ "once_cell",
+ "parking_lot_core 0.9.9",
+]
+
 [[package]]
 name = "der"
 version = "0.6.1"
@@ -1142,6 +1156,18 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "enum_dispatch"
+version = "0.3.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa18ce2bc66555b3218614519ac839ddb759a7d6720732f979ef8d13be147ecd"
+dependencies = [
+ "once_cell",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.48",
+]
+
 [[package]]
 name = "env_logger"
 version = "0.10.2"
@@ -1221,18 +1247,18 @@ checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"
 
 [[package]]
 name = "fjall"
-version = "1.5.0"
+version = "2.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e2fd11be247941253b9861c7ca94526d092d8311ac0a1740415242e3d9efd7a5"
+checksum = "5e33c3128fbd83d9d70ebcf093f3f91d8c20016af0aac545f80afbadd9dcd098"
 dependencies = [
  "byteorder",
- "crc32fast",
+ "dashmap 6.1.0",
- "fs_extra",
  "log",
  "lsm-tree",
  "path-absolutize",
  "std-semaphore",
  "tempfile",
+ "xxhash-rust",
 ]
 
 [[package]]
@@ -1254,12 +1280,6 @@ dependencies = [
 name = "format_table"
 version = "0.1.1"
 
-[[package]]
-name = "fs_extra"
-version = "1.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "42703706b716c37f96a77aea830392ad231f44c9e9a67872fa5548707e11b11c"
-
 [[package]]
 name = "futures"
 version = "0.3.30"
@@ -2522,21 +2542,25 @@ checksum = "a7a70ba024b9dc04c27ea2f0c0548feb474ec5c54bba33a7f72f873a39d07b24"
 
 [[package]]
 name = "lsm-tree"
-version = "1.5.0"
+version = "2.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e6b7522d314955643781c4050b48477985e61f892434e14e9e6148d27c60435d"
+checksum = "e7952bc71e90c0b58ce441dcf6cf8624cac042125dec1183ec9c48144f74378d"
 dependencies = [
  "byteorder",
- "crc32fast",
  "crossbeam-skiplist",
  "double-ended-peekable",
+ "enum_dispatch",
  "guardian",
  "log",
  "lz4_flex",
  "path-absolutize",
  "quick_cache",
+ "rustc-hash",
  "self_cell",
  "tempfile",
+ "value-log",
+ "varint-rs",
+ "xxhash-rust",
 ]
 
 [[package]]
@@ -2544,9 +2568,6 @@ name = "lz4_flex"
 version = "0.11.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "75761162ae2b0e580d7e7c390558127e5f01b4194debd6221fd8c207fc80e3f5"
-dependencies = [
- "twox-hash",
-]
 
 [[package]]
 name = "matchers"
@@ -2579,6 +2600,12 @@ version = "0.3.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
 
+[[package]]
+name = "min-max-heap"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2687e6cf9c00f48e9284cf9fd15f2ef341d03cc7743abf9df4c5f07fdee50b18"
+
 [[package]]
 name = "minimal-lexical"
 version = "0.2.1"
@@ -2803,7 +2830,7 @@ checksum = "6105e89802af13fdf48c49d7646d3b533a70e536d818aae7e78ba0433d01acb8"
 dependencies = [
  "async-trait",
  "crossbeam-channel",
- "dashmap",
+ "dashmap 4.0.2",
  "fnv",
  "futures-channel",
  "futures-executor",
@@ -3301,7 +3328,6 @@ version = "0.6.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2ec0b6fed0a0ff01fa82d0c8982389375dd59c72dae84d4f8a15b1a894c273f7"
 dependencies = [
- "ahash",
  "equivalent",
  "hashbrown 0.14.3",
 ]
@@ -3548,6 +3574,12 @@ version = "0.1.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d626bb9dae77e28219937af045c257c28bfd3f69333c512553507f5f9798cb76"
 
+[[package]]
+name = "rustc-hash"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "583034fd73374156e66797ed8e5b0d5690409c9226b22d87cb7f19821c05d152"
+
 [[package]]
 name = "rustc_version"
 version = "0.4.0"
@@ -3991,12 +4023,6 @@ dependencies = [
  "der",
 ]
 
-[[package]]
-name = "static_assertions"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
-
 [[package]]
 name = "static_init"
 version = "1.0.3"
@@ -4579,16 +4605,6 @@ version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b"
 
-[[package]]
-name = "twox-hash"
-version = "1.6.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97fee6b57c6a41524a810daee9286c02d7752c4253064d0b05472833a438f675"
-dependencies = [
- "cfg-if",
- "static_assertions",
-]
-
 [[package]]
 name = "typenum"
 version = "1.17.0"
@@ -4701,6 +4717,28 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "830b7e5d4d90034032940e4ace0d9a9a057e7a45cd94e6c007832e39edb82f6d"
 
+[[package]]
+name = "value-log"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e7c4b687fea1a6fe681fabdcc3e21cd01ce6df68d92c037ef2f3dacdd1daf4d"
+dependencies = [
+ "byteorder",
+ "log",
+ "min-max-heap",
+ "path-absolutize",
+ "quick_cache",
+ "rustc-hash",
+ "tempfile",
+ "xxhash-rust",
+]
+
+[[package]]
+name = "varint-rs"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f54a172d0620933a27a4360d3db3e2ae0dd6cceae9730751a036bbf182c4b23"
+
 [[package]]
 name = "vcpkg"
 version = "0.2.15"
@@ -5047,9 +5085,9 @@ checksum = "66fee0b777b0f5ac1c69bb06d361268faafa61cd4682ae064a171c16c433e9e4"
 
 [[package]]
 name = "xxhash-rust"
-version = "0.8.8"
+version = "0.8.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "53be06678ed9e83edb1745eb72efc0bbcd7b5c3c35711a860906aed827a13d61"
+checksum = "6a5cbf750400958819fb6178eaa83bee5cd9c29a26a40cc241df8c70fdd46984"
 
 [[package]]
 name = "zerocopy"

Cargo.toml

@@ -85,7 +85,7 @@ heed = { version = "0.11", default-features = false, features = ["lmdb"] }
 rusqlite = "0.31.0"
 r2d2 = "0.8"
 r2d2_sqlite = "0.24"
-fjall = "1.5"
+fjall = "2.4"
 
 async-compression = { version = "0.4", features = ["tokio", "zstd"] }
 zstd = { version = "0.13", default-features = false }

src/db/fjall_adapter.rs

@@ -1,13 +1,11 @@
 use core::ops::Bound;
-use core::pin::Pin;
-use core::ptr::NonNull;
 
 use std::collections::HashMap;
 use std::path::PathBuf;
 use std::sync::{Arc, RwLock};
 
 use fjall::{
-	PartitionCreateOptions, PersistMode, ReadTransaction, TransactionalKeyspace,
+	PartitionCreateOptions, PersistMode, TransactionalKeyspace,
 	TransactionalPartitionHandle, WriteTransaction,
 };
 
@@ -185,13 +183,13 @@ impl IDb for FjallDb {
 	fn iter(&self, tree_idx: usize) -> Result<ValueIter<'_>> {
 		let tree = self.get_tree(tree_idx)?;
 		let tx = self.keyspace.read_tx();
-		TxAndIterator::make(tx, |tx| Ok(tx.iter(&tree)))
+        Ok(Box::new(tx.iter(&tree).map(iterator_remap)))
 	}
 
 	fn iter_rev(&self, tree_idx: usize) -> Result<ValueIter<'_>> {
 		let tree = self.get_tree(tree_idx)?;
 		let tx = self.keyspace.read_tx();
-		TxAndIterator::make(tx, |tx| Ok(tx.iter(&tree).rev()))
+        Ok(Box::new(tx.iter(&tree).rev().map(iterator_remap)))
 	}
 
 	fn range<'r>(
@@ -202,9 +200,7 @@ impl IDb for FjallDb {
 	) -> Result<ValueIter<'_>> {
 		let tree = self.get_tree(tree_idx)?;
 		let tx = self.keyspace.read_tx();
-		TxAndIterator::make(tx, |tx| {
+        Ok(Box::new(tx.range::<&'r [u8], ByteRefRangeBound>(&tree, (low, high)).map(iterator_remap)))
-			Ok(tx.range::<&'r [u8], ByteRefRangeBound>(&tree, (low, high)))
-		})
 	}
 	fn range_rev<'r>(
 		&self,
@@ -214,11 +210,7 @@ impl IDb for FjallDb {
 	) -> Result<ValueIter<'_>> {
 		let tree = self.get_tree(tree_idx)?;
 		let tx = self.keyspace.read_tx();
-		TxAndIterator::make(tx, |tx| {
+        Ok(Box::new(tx.range::<&'r [u8], ByteRefRangeBound>(&tree, (low, high)).rev().map(iterator_remap)))
-			Ok(tx
-				.range::<&'r [u8], ByteRefRangeBound>(&tree, (low, high))
-				.rev())
-		})
 	}
 
 	// ----
@@ -296,11 +288,11 @@ impl<'a> ITx for FjallTx<'a> {
 
 	fn iter(&self, tree_idx: usize) -> TxOpResult<TxValueIter<'_>> {
 		let tree = self.get_tree(tree_idx)?.clone();
-		Ok(Box::new(self.tx.iter(&tree).map(tx_iter_item)))
+        Ok(Box::new(self.tx.iter(&tree).map(iterator_remap_tx)))
 	}
 	fn iter_rev(&self, tree_idx: usize) -> TxOpResult<TxValueIter<'_>> {
 		let tree = self.get_tree(tree_idx)?.clone();
-		Ok(Box::new(self.tx.iter(&tree).rev().map(tx_iter_item)))
+        Ok(Box::new(self.tx.iter(&tree).rev().map(iterator_remap_tx)))
 	}
 
 	fn range<'r>(
@@ -309,12 +301,10 @@ impl<'a> ITx for FjallTx<'a> {
 		low: Bound<&'r [u8]>,
 		high: Bound<&'r [u8]>,
 	) -> TxOpResult<TxValueIter<'_>> {
-		let tree = self.get_tree(tree_idx)?.clone();
+		let tree = self.get_tree(tree_idx)?;
-		Ok(Box::new(
+        let low = clone_bound(low);
-			self.tx
+        let high = clone_bound(high);
-				.range::<&'r [u8], ByteRefRangeBound>(&tree, (low, high))
+        Ok(Box::new(self.tx.range::<Vec<u8>, ByteVecRangeBounds>(&tree, (low, high)).map(iterator_remap_tx)))
-				.map(tx_iter_item),
-		))
 	}
 	fn range_rev<'r>(
 		&self,
@@ -322,92 +312,39 @@ impl<'a> ITx for FjallTx<'a> {
 		low: Bound<&'r [u8]>,
 		high: Bound<&'r [u8]>,
 	) -> TxOpResult<TxValueIter<'_>> {
-		let tree = self.get_tree(tree_idx)?.clone();
+		let tree = self.get_tree(tree_idx)?;
-		Ok(Box::new(
+        let low = clone_bound(low);
-			self.tx
+        let high = clone_bound(high);
-				.range::<&'r [u8], ByteRefRangeBound>(&tree, (low, high))
+        Ok(Box::new(self.tx.range::<Vec<u8>, ByteVecRangeBounds>(&tree, (low, high)).rev().map(iterator_remap_tx)))
-				.rev()
-				.map(tx_iter_item),
-		))
 	}
 }
 
-// ---- iterators outside transactions ----
+// -- maps fjall's (k, v) to ours
-// complicated, they must hold the transaction object
-// therefore a bit of unsafe code (it is a self-referential struct)
 
-type IteratorItem = fjall::Result<(fjall::UserKey, fjall::UserValue)>;
+fn iterator_remap(r: fjall::Result<(fjall::Slice, fjall::Slice)>) -> Result<(Value, Value)> {
-
+    r.map(|(k, v)| (k.to_vec(), v.to_vec()))
-struct TxAndIterator<I>
+        .map_err(|e| e.into())
-where
-	I: Iterator<Item = IteratorItem>,
-{
-	tx: ReadTransaction,
-	iter: Option<I>,
 }
 
-impl<'a, I> TxAndIterator<I>
+fn iterator_remap_tx(r: fjall::Result<(fjall::Slice, fjall::Slice)>) -> TxOpResult<(Value, Value)> {
-where
+    r.map(|(k, v)| (k.to_vec(), v.to_vec()))
-	I: Iterator<Item = IteratorItem> + 'a,
+        .map_err(|e| e.into())
-{
-	fn make<F>(tx: ReadTransaction, iterfun: F) -> Result<ValueIter<'a>>
-	where
-		F: FnOnce(&ReadTransaction) -> Result<I>,
-	{
-		let res = TxAndIterator { tx, iter: None };
-		let mut boxed = Box::pin(res);
-
-		// This unsafe allows us to bypass lifetime checks
-		let tx = unsafe { NonNull::from(&boxed.tx).as_ref() };
-		let iter = iterfun(tx)?;
-
-		let mut_ref = Pin::as_mut(&mut boxed);
-		// This unsafe allows us to write in a field of the pinned struct
-		unsafe {
-			Pin::get_unchecked_mut(mut_ref).iter = Some(iter);
-		}
-
-		Ok(Box::new(TxAndIteratorPin(boxed)))
-	}
 }
 
-impl<'a, I> Drop for TxAndIterator<I>
+// -- utils to deal with Garage's tightness on Bound lifetimes
-where
+
-	I: Iterator<Item = IteratorItem>,
+type ByteVecBound = Bound<Vec<u8>>;
-{
+type ByteVecRangeBounds = (ByteVecBound, ByteVecBound);
-	fn drop(&mut self) {
+
-		// ensure the iterator is dropped before the RoTxn it references
+fn clone_bound(bound: Bound<&[u8]>) -> ByteVecBound {
-		drop(self.iter.take());
+    let value = match bound {
-	}
+        Bound::Excluded(v) | Bound::Included(v) => v.to_vec(),
-}
+        Bound::Unbounded => vec!(),
-
+    };
-struct TxAndIteratorPin<I>(Pin<Box<TxAndIterator<I>>>)
+
-where
+    match bound {
-	I: Iterator<Item = IteratorItem>;
+        Bound::Included(_) => Bound::Included(value),
-
+        Bound::Excluded(_) => Bound::Excluded(value),
-impl<I> Iterator for TxAndIteratorPin<I>
+        Bound::Unbounded => Bound::Unbounded,
-where
+    }
-	I: Iterator<Item = IteratorItem>,
-{
-	type Item = Result<(Value, Value)>;
-
-	fn next(&mut self) -> Option<Self::Item> {
-		let mut_ref = Pin::as_mut(&mut self.0);
-		// This unsafe allows us to mutably access the iterator field
-		let next = unsafe { Pin::get_unchecked_mut(mut_ref).iter.as_mut()?.next() };
-		match next {
-			None => None,
-			Some(Err(e)) => Some(Err(e.into())),
-			Some(Ok((k, v))) => Some(Ok((k.to_vec(), v.to_vec()))),
-		}
-	}
-}
-
-// ---- iterators within transactions ----
-
-fn tx_iter_item<'a>(
-	item: std::result::Result<(Arc<[u8]>, Arc<[u8]>), fjall::Error>,
-) -> TxOpResult<(Vec<u8>, Vec<u8>)> {
-	item.map(|(k, v)| (k.to_vec(), v.to_vec()))
-		.map_err(|e| TxOpError(Error::from(e)))
 }

src/db/open.rs

@@ -1,4 +1,6 @@
 use std::path::PathBuf;
+use std::sync::Arc;
+use std::convert::TryInto;
 
 use crate::{Db, Error, Result};
 
@@ -54,6 +56,7 @@ impl std::str::FromStr for Engine {
 pub struct OpenOpt {
 	pub fsync: bool,
 	pub lmdb_map_size: Option<usize>,
+    pub fjall_block_cache_size: Option<usize>,
 }
 
 impl Default for OpenOpt {
@@ -61,6 +64,7 @@ impl Default for OpenOpt {
 		Self {
 			fsync: false,
 			lmdb_map_size: None,
+            fjall_block_cache_size: None,
 		}
 	}
 }
@@ -122,7 +126,12 @@ pub fn open_db(path: &PathBuf, engine: Engine, opt: &OpenOpt) -> Result<Db> {
 		Engine::Fjall => {
 			info!("Opening Fjall database at: {}", path.display());
             let fsync_ms = opt.fsync.then(|| 1000 as u16);
-			let keyspace = fjall::Config::new(path).fsync_ms(fsync_ms).open_transactional()?;
+            let mut config = fjall::Config::new(path).fsync_ms(fsync_ms);
+            if let Some(block_cache_size) = opt.fjall_block_cache_size {
+                let block_cache = Arc::new(fjall::BlockCache::with_capacity_bytes(block_cache_size.try_into().unwrap()));
+                config = config.block_cache(block_cache);
+            }
+			let keyspace = config.open_transactional()?;
 			Ok(crate::fjall_adapter::FjallDb::init(path, keyspace))
 		}
 

src/model/garage.rs

@@ -134,6 +134,10 @@ impl Garage {
 				v if v == usize::default() => None,
 				v => Some(v),
 			},
+			fjall_block_cache_size: match config.fjall_block_cache_size {
+				v if v == usize::default() => None,
+				v => Some(v),
+			},
 		};
 		let db = db::open_db(&db_path, db_engine, &db_opt)
 			.ok_or_message("Unable to open metadata db")?;

src/util/config.rs

@@ -115,6 +115,10 @@ pub struct Config {
 	#[serde(deserialize_with = "deserialize_capacity", default)]
 	pub lmdb_map_size: usize,
 
+    /// Fjall block cache size
+    #[serde(deserialize_with = "deserialize_capacity", default)]
+	pub fjall_block_cache_size: usize,
+
 	// -- APIs
 	/// Configuration for S3 api
 	pub s3_api: S3ApiConfig,