garage_db: rename len to approximate_len as it is used for stats only

src/table/data.rs

@@ -367,7 +367,7 @@ impl<F: TableSchema, R: TableReplication> TableData<F, R> {
 		}
 	}
 
-	pub fn gc_todo_len(&self) -> Result<usize, Error> {
-		Ok(self.gc_todo.len()?)
+	pub fn gc_todo_approximate_len(&self) -> Result<usize, Error> {
+		Ok(self.gc_todo.approximate_len()?)
 	}
 }

src/table/gc.rs

@@ -313,7 +313,7 @@ impl<F: TableSchema, R: TableReplication> Worker for GcWorker<F, R> {
 
 	fn status(&self) -> WorkerStatus {
 		WorkerStatus {
-			queue_length: Some(self.gc.data.gc_todo_len().unwrap_or(0) as u64),
+			queue_length: Some(self.gc.data.gc_todo_approximate_len().unwrap_or(0) as u64),
 			..Default::default()
 		}
 	}

src/table/merkle.rs

@@ -287,12 +287,12 @@ impl<F: TableSchema, R: TableReplication> MerkleUpdater<F, R> {
 		MerkleNode::decode_opt(&ent)
 	}
 
-	pub fn merkle_tree_len(&self) -> Result<usize, Error> {
-		Ok(self.data.merkle_tree.len()?)
+	pub fn merkle_tree_approximate_len(&self) -> Result<usize, Error> {
+		Ok(self.data.merkle_tree.approximate_len()?)
 	}
 
-	pub fn todo_len(&self) -> Result<usize, Error> {
-		Ok(self.data.merkle_todo.len()?)
+	pub fn todo_approximate_len(&self) -> Result<usize, Error> {
+		Ok(self.data.merkle_todo.approximate_len()?)
 	}
 }
 
@@ -306,7 +306,7 @@ impl<F: TableSchema, R: TableReplication> Worker for MerkleWorker<F, R> {
 
 	fn status(&self) -> WorkerStatus {
 		WorkerStatus {
-			queue_length: Some(self.0.todo_len().unwrap_or(0) as u64),
+			queue_length: Some(self.0.todo_approximate_len().unwrap_or(0) as u64),
 			..Default::default()
 		}
 	}

src/table/metrics.rs

@@ -34,7 +34,7 @@ impl TableMetrics {
 				.u64_value_observer(
 					"table.size",
 					move |observer| {
-						if let Ok(value) = store.len() {
+						if let Ok(value) = store.approximate_len() {
 							observer.observe(
 								value as u64,
 								&[KeyValue::new("table_name", table_name)],
@@ -48,7 +48,7 @@ impl TableMetrics {
 				.u64_value_observer(
 					"table.merkle_tree_size",
 					move |observer| {
-						if let Ok(value) = merkle_tree.len() {
+						if let Ok(value) = merkle_tree.approximate_len() {
 							observer.observe(
 								value as u64,
 								&[KeyValue::new("table_name", table_name)],
@@ -62,7 +62,7 @@ impl TableMetrics {
 				.u64_value_observer(
 					"table.merkle_updater_todo_queue_length",
 					move |observer| {
-						if let Ok(v) = merkle_todo.len() {
+						if let Ok(v) = merkle_todo.approximate_len() {
 							observer.observe(
 								v as u64,
 								&[KeyValue::new("table_name", table_name)],
@@ -76,7 +76,7 @@ impl TableMetrics {
 				.u64_value_observer(
 					"table.gc_todo_queue_length",
 					move |observer| {
-                        if let Ok(value) = gc_todo.len() {
+                        if let Ok(value) = gc_todo.approximate_len() {
                             observer.observe(
                                 value as u64,
                                 &[KeyValue::new("table_name", table_name)],

src/table/queue.rs

@@ -27,7 +27,7 @@ impl<F: TableSchema, R: TableReplication> Worker for InsertQueueWorker<F, R> {
 
 	fn status(&self) -> WorkerStatus {
 		WorkerStatus {
-			queue_length: Some(self.0.data.insert_queue.len().unwrap_or(0) as u64),
+			queue_length: Some(self.0.data.insert_queue.approximate_len().unwrap_or(0) as u64),
 			..Default::default()
 		}
 	}