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perf(kv): dont retrieve values for write ops

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see Deuxfleurs/garage#851
This commit is contained in:
marvin-j97 2024-09-04 18:45:17 +02:00
parent 615698df7d
commit 74363c9060
3 changed files with 14 additions and 24 deletions
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12
src/db/lib.rs
View file

@ -211,16 +211,12 @@ impl Tree {
/// Returns the old value if there was one /// Returns the old value if there was one
#[inline] #[inline]
pub fn insert<T: AsRef<[u8]>, U: AsRef<[u8]>>( pub fn insert<T: AsRef<[u8]>, U: AsRef<[u8]>>(&self, key: T, value: U) -> Result<()> {
&self,
key: T,
value: U,
) -> Result<Option<Value>> {
self.0.insert(self.1, key.as_ref(), value.as_ref()) self.0.insert(self.1, key.as_ref(), value.as_ref())
} }
/// Returns the old value if there was one /// Returns the old value if there was one
#[inline] #[inline]
pub fn remove<T: AsRef<[u8]>>(&self, key: T) -> Result<Option<Value>> { pub fn remove<T: AsRef<[u8]>>(&self, key: T) -> Result<()> {
self.0.remove(self.1, key.as_ref()) self.0.remove(self.1, key.as_ref())
} }
/// Clears all values from the tree /// Clears all values from the tree
@ -339,8 +335,8 @@ pub(crate) trait IDb: Send + Sync {
fn get(&self, tree: usize, key: &[u8]) -> Result<Option<Value>>; fn get(&self, tree: usize, key: &[u8]) -> Result<Option<Value>>;
fn len(&self, tree: usize) -> Result<usize>; fn len(&self, tree: usize) -> Result<usize>;
fn insert(&self, tree: usize, key: &[u8], value: &[u8]) -> Result<Option<Value>>; fn insert(&self, tree: usize, key: &[u8], value: &[u8]) -> Result<()>;
fn remove(&self, tree: usize, key: &[u8]) -> Result<Option<Value>>; fn remove(&self, tree: usize, key: &[u8]) -> Result<()>;
fn clear(&self, tree: usize) -> Result<()>; fn clear(&self, tree: usize) -> Result<()>;
fn iter(&self, tree: usize) -> Result<ValueIter<'_>>; fn iter(&self, tree: usize) -> Result<ValueIter<'_>>;

10
src/db/lmdb_adapter.rs
View file

@ -132,22 +132,20 @@ impl IDb for LmdbDb {
Ok(tree.len(&tx)?.try_into().unwrap()) Ok(tree.len(&tx)?.try_into().unwrap())
} }
fn insert(&self, tree: usize, key: &[u8], value: &[u8]) -> Result<Option<Value>> { fn insert(&self, tree: usize, key: &[u8], value: &[u8]) -> Result<()> {
let tree = self.get_tree(tree)?; let tree = self.get_tree(tree)?;
let mut tx = self.db.write_txn()?; let mut tx = self.db.write_txn()?;
let old_val = tree.get(&tx, key)?.map(Vec::from);
tree.put(&mut tx, key, value)?; tree.put(&mut tx, key, value)?;
tx.commit()?; tx.commit()?;
Ok(old_val) Ok(())
} }
fn remove(&self, tree: usize, key: &[u8]) -> Result<Option<Value>> { fn remove(&self, tree: usize, key: &[u8]) -> Result<()> {
let tree = self.get_tree(tree)?; let tree = self.get_tree(tree)?;
let mut tx = self.db.write_txn()?; let mut tx = self.db.write_txn()?;
let old_val = tree.get(&tx, key)?.map(Vec::from);
tree.delete(&mut tx, key)?; tree.delete(&mut tx, key)?;
tx.commit()?; tx.commit()?;
Ok(old_val) Ok(())
} }
fn clear(&self, tree: usize) -> Result<()> { fn clear(&self, tree: usize) -> Result<()> {

16
src/db/sqlite_adapter.rs
View file

@ -169,7 +169,7 @@ impl IDb for SqliteDb {
} }
} }
fn insert(&self, tree: usize, key: &[u8], value: &[u8]) -> Result<Option<Value>> { fn insert(&self, tree: usize, key: &[u8], value: &[u8]) -> Result<()> {
let tree = self.get_tree(tree)?; let tree = self.get_tree(tree)?;
let db = self.db.get()?; let db = self.db.get()?;
let lock = self.write_lock.lock(); let lock = self.write_lock.lock();
@ -184,23 +184,19 @@ impl IDb for SqliteDb {
assert_eq!(n, 1); assert_eq!(n, 1);
drop(lock); drop(lock);
Ok(old_val) Ok(())
} }
fn remove(&self, tree: usize, key: &[u8]) -> Result<Option<Value>> { fn remove(&self, tree: usize, key: &[u8]) -> Result<()> {
let tree = self.get_tree(tree)?; let tree = self.get_tree(tree)?;
let db = self.db.get()?; let db = self.db.get()?;
let lock = self.write_lock.lock(); let lock = self.write_lock.lock();
let old_val = self.internal_get(&db, &tree, key)?; let n = db.execute(&format!("DELETE FROM {} WHERE k = ?1", tree), params![key])?;
assert_eq!(n, 1);
if old_val.is_some() {
let n = db.execute(&format!("DELETE FROM {} WHERE k = ?1", tree), params![key])?;
assert_eq!(n, 1);
}
drop(lock); drop(lock);
Ok(old_val) Ok(())
} }
fn clear(&self, tree: usize) -> Result<()> { fn clear(&self, tree: usize) -> Result<()> {