risingwave_meta/hummock/compaction/selector/
space_reclaim_selector.rs

1//  Copyright 2025 RisingWave Labs
2//
3//  Licensed under the Apache License, Version 2.0 (the "License");
4//  you may not use this file except in compliance with the License.
5//  You may obtain a copy of the License at
6//
7//  http://www.apache.org/licenses/LICENSE-2.0
8//
9//  Unless required by applicable law or agreed to in writing, software
10//  distributed under the License is distributed on an "AS IS" BASIS,
11//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12//  See the License for the specific language governing permissions and
13//  limitations under the License.
14//
15// Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
16// This source code is licensed under both the GPLv2 (found in the
17// COPYING file in the root directory) and Apache 2.0 License
18// (found in the LICENSE.Apache file in the root directory).
19
20use std::collections::HashMap;
21
22use risingwave_hummock_sdk::HummockCompactionTaskId;
23use risingwave_pb::hummock::compact_task;
24
25use super::{CompactionSelector, DynamicLevelSelectorCore};
26use crate::hummock::compaction::picker::{SpaceReclaimCompactionPicker, SpaceReclaimPickerState};
27use crate::hummock::compaction::selector::CompactionSelectorContext;
28use crate::hummock::compaction::{CompactionTask, create_compaction_task};
29
30#[derive(Default)]
31pub struct SpaceReclaimCompactionSelector {
32    state: HashMap<u64, SpaceReclaimPickerState>,
33}
34
35impl CompactionSelector for SpaceReclaimCompactionSelector {
36    fn pick_compaction(
37        &mut self,
38        task_id: HummockCompactionTaskId,
39        context: CompactionSelectorContext<'_>,
40    ) -> Option<CompactionTask> {
41        let CompactionSelectorContext {
42            group,
43            levels,
44            member_table_ids,
45            level_handlers,
46            developer_config,
47            ..
48        } = context;
49        let dynamic_level_core =
50            DynamicLevelSelectorCore::new(group.compaction_config.clone(), developer_config);
51        let mut picker = SpaceReclaimCompactionPicker::new(
52            group.compaction_config.max_space_reclaim_bytes,
53            member_table_ids
54                .iter()
55                .map(|table_id| table_id.table_id)
56                .collect(),
57        );
58        let ctx = dynamic_level_core.calculate_level_base_size(levels);
59        let state = self.state.entry(group.group_id).or_default();
60
61        let compaction_input = picker.pick_compaction(levels, level_handlers, state)?;
62        compaction_input.add_pending_task(task_id, level_handlers);
63
64        Some(create_compaction_task(
65            dynamic_level_core.get_config(),
66            compaction_input,
67            ctx.base_level,
68            self.task_type(),
69        ))
70    }
71
72    fn name(&self) -> &'static str {
73        "SpaceReclaimCompaction"
74    }
75
76    fn task_type(&self) -> compact_task::TaskType {
77        compact_task::TaskType::SpaceReclaim
78    }
79}
risingwave_meta/hummock/compaction/selector/space_reclaim_selector.rs

risingwave_meta/hummock/compaction/selector/
space_reclaim_selector.rs
