// Licensed to the Apache Software Foundation (ASF) under one

// or more contributor license agreements.  See the NOTICE file

// distributed with this work for additional information

// regarding copyright ownership.  The ASF licenses this file

// to you under the Apache License, Version 2.0 (the

// "License"); you may not use this file except in compliance

// with the License.  You may obtain a copy of the License at

//

//   http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing,

// software distributed under the License is distributed on an

// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

// KIND, either express or implied.  See the License for the

// specific language governing permissions and limitations

// under the License.

#include "cloud/cloud_warm_up_manager.h"

#include <bthread/condition_variable.h>

#include <bthread/mutex.h>

#include <bthread/unstable.h>

#include <butil/time.h>

#include <bvar/bvar.h>

#include <bvar/reducer.h>

#include <algorithm>

#include <cstddef>

#include <tuple>

#include "bvar/bvar.h"

#include "cloud/cloud_tablet.h"

#include "cloud/cloud_tablet_mgr.h"

#include "cloud/config.h"

#include "common/cast_set.h"

#include "common/logging.h"

#include "io/cache/block_file_cache_downloader.h"

#include "runtime/exec_env.h"

#include "storage/index/inverted/inverted_index_desc.h"

#include "storage/rowset/beta_rowset.h"

#include "storage/tablet/tablet.h"

#include "util/brpc_client_cache.h" // BrpcClientCache

#include "util/client_cache.h"

#include "util/stack_util.h"

#include "util/thrift_rpc_helper.h"

#include "util/time.h"

namespace doris {

#include "common/compile_check_begin.h"

bvar::Adder<uint64_t> g_file_cache_event_driven_warm_up_skipped_rowset_num(

        "file_cache_event_driven_warm_up_skipped_rowset_num");

bvar::Adder<uint64_t> g_file_cache_event_driven_warm_up_requested_segment_size(

        "file_cache_event_driven_warm_up_requested_segment_size");

bvar::Adder<uint64_t> g_file_cache_event_driven_warm_up_requested_segment_num(

        "file_cache_event_driven_warm_up_requested_segment_num");

bvar::Adder<uint64_t> g_file_cache_event_driven_warm_up_requested_index_size(

        "file_cache_event_driven_warm_up_requested_index_size");

bvar::Adder<uint64_t> g_file_cache_event_driven_warm_up_requested_index_num(

        "file_cache_event_driven_warm_up_requested_index_num");

bvar::Adder<uint64_t> g_file_cache_once_or_periodic_warm_up_submitted_tablet_num(

        "file_cache_once_or_periodic_warm_up_submitted_tablet_num");

bvar::Adder<uint64_t> g_file_cache_once_or_periodic_warm_up_finished_tablet_num(

        "file_cache_once_or_periodic_warm_up_finished_tablet_num");

bvar::Adder<uint64_t> g_file_cache_once_or_periodic_warm_up_submitted_segment_size(

        "file_cache_once_or_periodic_warm_up_submitted_segment_size");

bvar::Adder<uint64_t> g_file_cache_once_or_periodic_warm_up_submitted_segment_num(

        "file_cache_once_or_periodic_warm_up_submitted_segment_num");

bvar::Adder<uint64_t> g_file_cache_once_or_periodic_warm_up_submitted_index_size(

        "file_cache_once_or_periodic_warm_up_submitted_index_size");

bvar::Adder<uint64_t> g_file_cache_once_or_periodic_warm_up_submitted_index_num(

        "file_cache_once_or_periodic_warm_up_submitted_index_num");

bvar::Adder<uint64_t> g_file_cache_once_or_periodic_warm_up_finished_segment_size(

        "file_cache_once_or_periodic_warm_up_finished_segment_size");

bvar::Adder<uint64_t> g_file_cache_once_or_periodic_warm_up_finished_segment_num(

        "file_cache_once_or_periodic_warm_up_finished_segment_num");

bvar::Adder<uint64_t> g_file_cache_once_or_periodic_warm_up_finished_index_size(

        "file_cache_once_or_periodic_warm_up_finished_index_size");

bvar::Adder<uint64_t> g_file_cache_once_or_periodic_warm_up_finished_index_num(

        "file_cache_once_or_periodic_warm_up_finished_index_num");

bvar::Adder<uint64_t> g_file_cache_recycle_cache_requested_segment_num(

        "file_cache_recycle_cache_requested_segment_num");

bvar::Adder<uint64_t> g_file_cache_recycle_cache_requested_index_num(

        "file_cache_recycle_cache_requested_index_num");

bvar::Status<int64_t> g_file_cache_warm_up_rowset_last_call_unix_ts(

        "file_cache_warm_up_rowset_last_call_unix_ts", 0);

bvar::Adder<uint64_t> file_cache_warm_up_failed_task_num("file_cache_warm_up", "failed_task_num");

bvar::Adder<uint64_t> g_balance_tablet_be_mapping_size("balance_tablet_be_mapping_size");

bvar::LatencyRecorder g_file_cache_warm_up_rowset_wait_for_compaction_latency(

        "file_cache_warm_up_rowset_wait_for_compaction_latency");

CloudWarmUpManager::CloudWarmUpManager(CloudStorageEngine& engine) : _engine(engine) {

    _download_thread = std::thread(&CloudWarmUpManager::handle_jobs, this);

    static_cast<void>(ThreadPoolBuilder("CloudWarmUpManagerThreadPool")

                              .set_min_threads(1)

                              .set_max_threads(config::warm_up_manager_thread_pool_size)

                              .build(&_thread_pool));

    _thread_pool_token = _thread_pool->new_token(ThreadPool::ExecutionMode::CONCURRENT);

}

CloudWarmUpManager::~CloudWarmUpManager() {

    {

        std::lock_guard lock(_mtx);

        _closed = true;

    }

    _cond.notify_all();

    if (_download_thread.joinable()) {

        _download_thread.join();

    }

    for (auto& shard : _balanced_tablets_shards) {

        std::lock_guard<std::mutex> lock(shard.mtx);

        shard.tablets.clear();

    }

}

std::unordered_map<std::string, RowsetMetaSharedPtr> snapshot_rs_metas(BaseTablet* tablet) {

    std::unordered_map<std::string, RowsetMetaSharedPtr> id_to_rowset_meta_map;

    auto visitor = [&id_to_rowset_meta_map](const RowsetSharedPtr& r) {

        id_to_rowset_meta_map.emplace(r->rowset_meta()->rowset_id().to_string(), r->rowset_meta());

    };

    constexpr bool include_stale = false;

    tablet->traverse_rowsets(visitor, include_stale);

    return id_to_rowset_meta_map;

}

void CloudWarmUpManager::submit_download_tasks(io::Path path, int64_t file_size,

                                               io::FileSystemSPtr file_system,

                                               int64_t expiration_time,

                                               std::shared_ptr<bthread::CountdownEvent> wait,

                                               bool is_index, std::function<void(Status)> done_cb,

                                               int64_t tablet_id) {

    VLOG_DEBUG << "submit warm up task for file: " << path << ", file_size: " << file_size

               << ", expiration_time: " << expiration_time

               << ", is_index: " << (is_index ? "true" : "false");

    if (file_size < 0) {

        auto st = file_system->file_size(path, &file_size);

        if (!st.ok()) [[unlikely]] {

            LOG(WARNING) << "get file size failed: " << path;

            file_cache_warm_up_failed_task_num << 1;

            return;

        }

    }

    if (is_index) {

        g_file_cache_once_or_periodic_warm_up_submitted_index_num << 1;

        g_file_cache_once_or_periodic_warm_up_submitted_index_size << file_size;

    } else {

        g_file_cache_once_or_periodic_warm_up_submitted_segment_num << 1;

        g_file_cache_once_or_periodic_warm_up_submitted_segment_size << file_size;

    }

    const int64_t chunk_size = 10 * 1024 * 1024; // 10MB

    int64_t offset = 0;

    int64_t remaining_size = file_size;

    while (remaining_size > 0) {

        int64_t current_chunk_size = std::min(chunk_size, remaining_size);

        wait->add_count();

        _engine.file_cache_block_downloader().submit_download_task(io::DownloadFileMeta {

                .path = path,

                .file_size = file_size,

                .offset = offset,

                .download_size = current_chunk_size,

                .file_system = file_system,

                .ctx = {.expiration_time = expiration_time,

                        .is_dryrun = config::enable_reader_dryrun_when_download_file_cache,

                        .is_warmup = true},

                .download_done =

                        [=, done_cb = std::move(done_cb)](Status st) {

                            if (done_cb) done_cb(st);

                            if (!st) {

                                LOG_WARNING("Warm up error ").error(st);

                            } else if (is_index) {

                                g_file_cache_once_or_periodic_warm_up_finished_index_num

                                        << (offset == 0 ? 1 : 0);

                                g_file_cache_once_or_periodic_warm_up_finished_index_size

                                        << current_chunk_size;

                            } else {

                                g_file_cache_once_or_periodic_warm_up_finished_segment_num

                                        << (offset == 0 ? 1 : 0);

                                g_file_cache_once_or_periodic_warm_up_finished_segment_size

                                        << current_chunk_size;

                            }

                            wait->signal();

                        },

                .tablet_id = tablet_id,

        });

        offset += current_chunk_size;

        remaining_size -= current_chunk_size;

    }

}

void CloudWarmUpManager::handle_jobs() {

#ifndef BE_TEST

    constexpr int WAIT_TIME_SECONDS = 600;

    while (true) {

        std::shared_ptr<JobMeta> cur_job = nullptr;

        {

            std::unique_lock lock(_mtx);

            while (!_closed && _pending_job_metas.empty()) {

                _cond.wait(lock);

            }

            if (_closed) break;

            if (!_pending_job_metas.empty()) {

                cur_job = _pending_job_metas.front();

            }

        }

        if (!cur_job) {

            LOG_WARNING("Warm up job is null");

            continue;

        }

        std::shared_ptr<bthread::CountdownEvent> wait =

                std::make_shared<bthread::CountdownEvent>(0);

        for (int64_t tablet_id : cur_job->tablet_ids) {

            VLOG_DEBUG << "Warm up tablet " << tablet_id << " stack: " << get_stack_trace();

            if (_cur_job_id == 0) { // The job is canceled

                break;

            }

            auto res = _engine.tablet_mgr().get_tablet(tablet_id);

            if (!res.has_value()) {

                LOG_WARNING("Warm up error ").tag("tablet_id", tablet_id).error(res.error());

                continue;

            }

            auto tablet = res.value();

            auto st = tablet->sync_rowsets();

            if (!st) {

                LOG_WARNING("Warm up error ").tag("tablet_id", tablet_id).error(st);

                continue;

            }

            auto tablet_meta = tablet->tablet_meta();

            auto rs_metas = snapshot_rs_metas(tablet.get());

            for (auto& [_, rs] : rs_metas) {

                auto storage_resource = rs->remote_storage_resource();

                if (!storage_resource) {

                    LOG(WARNING) << storage_resource.error();

                    continue;

                }

                int64_t expiration_time = tablet_meta->ttl_seconds();

                if (!tablet->add_rowset_warmup_state(*rs, WarmUpTriggerSource::JOB)) {

                    LOG(INFO) << "found duplicate warmup task for rowset " << rs->rowset_id()

                              << ", skip it";

                    continue;

                }

                for (int64_t seg_id = 0; seg_id < rs->num_segments(); seg_id++) {

                    // 1st. download segment files

                    // Use rs->fs() instead of storage_resource.value()->fs to support packed

                    // files. PackedFileSystem wrapper in RowsetMeta::fs() handles the index_map

                    // lookup and reads from the correct packed file.

                    if (!config::file_cache_enable_only_warm_up_idx) {

                        submit_download_tasks(

                                storage_resource.value()->remote_segment_path(*rs, seg_id),

                                rs->segment_file_size(cast_set<int>(seg_id)), rs->fs(),

                                expiration_time, wait, false,

                                [tablet, rs, seg_id](Status st) {

                                    VLOG_DEBUG << "warmup rowset " << rs->version() << " segment "

                                               << seg_id << " completed";

                                    if (tablet->complete_rowset_segment_warmup(

                                                      WarmUpTriggerSource::JOB, rs->rowset_id(), st,

                                                      1, 0)

                                                .trigger_source == WarmUpTriggerSource::JOB) {

                                        VLOG_DEBUG << "warmup rowset " << rs->version()

                                                   << " completed";

                                    }

                                },

                                tablet_id);

                    }

                    // 2nd. download inverted index files

                    int64_t file_size = -1;

                    auto schema_ptr = rs->tablet_schema();

                    auto idx_version = schema_ptr->get_inverted_index_storage_format();

                    const auto& idx_file_info = rs->inverted_index_file_info(cast_set<int>(seg_id));

                    if (idx_version == InvertedIndexStorageFormatPB::V1) {

                        auto&& inverted_index_info =

                                rs->inverted_index_file_info(cast_set<int>(seg_id));

                        std::unordered_map<int64_t, int64_t> index_size_map;

                        for (const auto& info : inverted_index_info.index_info()) {

                            if (info.index_file_size() != -1) {

                                index_size_map[info.index_id()] = info.index_file_size();

                            } else {

                                VLOG_DEBUG << "Invalid index_file_size for segment_id " << seg_id

                                           << ", index_id " << info.index_id();

                            }

                        }

                        for (const auto& index : schema_ptr->inverted_indexes()) {

                            auto idx_path = storage_resource.value()->remote_idx_v1_path(

                                    *rs, seg_id, index->index_id(), index->get_index_suffix());

                            if (idx_file_info.index_info_size() > 0) {

                                for (const auto& idx_info : idx_file_info.index_info()) {

                                    if (index->index_id() == idx_info.index_id() &&

                                        index->get_index_suffix() == idx_info.index_suffix()) {

                                        file_size = idx_info.index_file_size();

                                        break;

                                    }

                                }

                            }

                            tablet->update_rowset_warmup_state_inverted_idx_num(

                                    WarmUpTriggerSource::JOB, rs->rowset_id(), 1);

                            submit_download_tasks(

                                    idx_path, file_size, rs->fs(), expiration_time, wait, true,

                                    [=](Status st) {

                                        VLOG_DEBUG << "warmup rowset " << rs->version()

                                                   << " segment " << seg_id

                                                   << "inverted idx:" << idx_path << " completed";

                                        if (tablet->complete_rowset_segment_warmup(

                                                          WarmUpTriggerSource::JOB, rs->rowset_id(),

                                                          st, 0, 1)

                                                    .trigger_source == WarmUpTriggerSource::JOB) {

                                            VLOG_DEBUG << "warmup rowset " << rs->version()

                                                       << " completed";

                                        }

                                    },

                                    tablet_id);

                        }

                    } else {

                        if (schema_ptr->has_inverted_index() || schema_ptr->has_ann_index()) {

                            auto idx_path =

                                    storage_resource.value()->remote_idx_v2_path(*rs, seg_id);

                            file_size = idx_file_info.has_index_size() ? idx_file_info.index_size()

                                                                       : -1;

                            tablet->update_rowset_warmup_state_inverted_idx_num(

                                    WarmUpTriggerSource::JOB, rs->rowset_id(), 1);

                            submit_download_tasks(

                                    idx_path, file_size, rs->fs(), expiration_time, wait, true,

                                    [=](Status st) {

                                        VLOG_DEBUG << "warmup rowset " << rs->version()

                                                   << " segment " << seg_id

                                                   << "inverted idx:" << idx_path << " completed";

                                        if (tablet->complete_rowset_segment_warmup(

                                                          WarmUpTriggerSource::JOB, rs->rowset_id(),

                                                          st, 0, 1)

                                                    .trigger_source == WarmUpTriggerSource::JOB) {

                                            VLOG_DEBUG << "warmup rowset " << rs->version()

                                                       << " completed";

                                        }

                                    },

                                    tablet_id);

                        }

                    }

                }

            }

            g_file_cache_once_or_periodic_warm_up_finished_tablet_num << 1;

        }

        timespec time;

        time.tv_sec = UnixSeconds() + WAIT_TIME_SECONDS;

        if (wait->timed_wait(time)) {

            LOG_WARNING("Warm up {} tablets take a long time", cur_job->tablet_ids.size());

        }

        {

            std::unique_lock lock(_mtx);

            _finish_job.push_back(cur_job);

            // _pending_job_metas may be cleared by a CLEAR_JOB request

            // so we need to check it again.

            if (!_pending_job_metas.empty()) {

                // We can not call pop_front before the job is finished,

                // because GET_CURRENT_JOB_STATE_AND_LEASE is relying on the pending job size.

                _pending_job_metas.pop_front();

            }

        }

    }

#endif

}

JobMeta::JobMeta(const TJobMeta& meta)

        : be_ip(meta.be_ip), brpc_port(meta.brpc_port), tablet_ids(meta.tablet_ids) {

    switch (meta.download_type) {

    case TDownloadType::BE:

        download_type = DownloadType::BE;

        break;

    case TDownloadType::S3:

        download_type = DownloadType::S3;

        break;

    }

}

Status CloudWarmUpManager::check_and_set_job_id(int64_t job_id) {

    std::lock_guard lock(_mtx);

    if (_cur_job_id == 0) {

        _cur_job_id = job_id;

    }

    Status st = Status::OK();

    if (_cur_job_id != job_id) {

        st = Status::InternalError("The job {} is running", _cur_job_id);

    }

    return st;

}

Status CloudWarmUpManager::check_and_set_batch_id(int64_t job_id, int64_t batch_id, bool* retry) {

    std::lock_guard lock(_mtx);

    Status st = Status::OK();

    if (_cur_job_id != 0 && _cur_job_id != job_id) {

        st = Status::InternalError("The job {} is not current job, current job is {}", job_id,

                                   _cur_job_id);

        return st;

    }

    if (_cur_job_id == 0) {

        _cur_job_id = job_id;

    }

    if (_cur_batch_id == batch_id) {

        *retry = true;

        return st;

    }

    if (_pending_job_metas.empty()) {

        _cur_batch_id = batch_id;

    } else {

        st = Status::InternalError("The batch {} is not finish", _cur_batch_id);

    }

    return st;

}

void CloudWarmUpManager::add_job(const std::vector<TJobMeta>& job_metas) {

    {

        std::lock_guard lock(_mtx);

        std::for_each(job_metas.begin(), job_metas.end(), [this](const TJobMeta& meta) {

            _pending_job_metas.emplace_back(std::make_shared<JobMeta>(meta));

            g_file_cache_once_or_periodic_warm_up_submitted_tablet_num << meta.tablet_ids.size();

        });

    }

    _cond.notify_all();

}

#ifdef BE_TEST

void CloudWarmUpManager::consumer_job() {

    {

        std::unique_lock lock(_mtx);

        _finish_job.push_back(_pending_job_metas.front());

        _pending_job_metas.pop_front();

    }

}

#endif

std::tuple<int64_t, int64_t, int64_t, int64_t> CloudWarmUpManager::get_current_job_state() {

    std::lock_guard lock(_mtx);

    return std::make_tuple(_cur_job_id, _cur_batch_id, _pending_job_metas.size(),

                           _finish_job.size());

}

Status CloudWarmUpManager::clear_job(int64_t job_id) {

    std::lock_guard lock(_mtx);

    Status st = Status::OK();

    if (job_id == _cur_job_id) {

        _cur_job_id = 0;

        _cur_batch_id = -1;

        _pending_job_metas.clear();

        _finish_job.clear();

    } else {

        st = Status::InternalError("The job {} is not current job, current job is {}", job_id,

                                   _cur_job_id);

    }

    return st;

}

Status CloudWarmUpManager::set_event(int64_t job_id, TWarmUpEventType::type event, bool clear) {

    DBUG_EXECUTE_IF("CloudWarmUpManager.set_event.ignore_all", {

        LOG(INFO) << "Ignore set_event request, job_id=" << job_id << ", event=" << event

                  << ", clear=" << clear;

        return Status::OK();

    });

    std::lock_guard lock(_mtx);

    Status st = Status::OK();

    if (event == TWarmUpEventType::type::LOAD) {

        if (clear) {

            _tablet_replica_cache.erase(job_id);

            LOG(INFO) << "Clear event driven sync, job_id=" << job_id << ", event=" << event;

        } else if (!_tablet_replica_cache.contains(job_id)) {

            static_cast<void>(_tablet_replica_cache[job_id]);

            LOG(INFO) << "Set event driven sync, job_id=" << job_id << ", event=" << event;

        }

    } else {

        st = Status::InternalError("The event {} is not supported yet", event);

    }

    return st;

}

std::vector<TReplicaInfo> CloudWarmUpManager::get_replica_info(int64_t tablet_id, bool bypass_cache,

                                                               bool& cache_hit) {

    std::vector<TReplicaInfo> replicas;

    std::vector<int64_t> cancelled_jobs;

    std::lock_guard<std::mutex> lock(_mtx);

    cache_hit = false;

    for (auto& [job_id, cache] : _tablet_replica_cache) {

        if (!bypass_cache) {

            auto it = cache.find(tablet_id);

            if (it != cache.end()) {

                // check ttl expire

                auto now = std::chrono::steady_clock::now();

                auto sec = std::chrono::duration_cast<std::chrono::seconds>(now - it->second.first);

                if (sec.count() < config::warmup_tablet_replica_info_cache_ttl_sec) {

                    replicas.push_back(it->second.second);

                    LOG(INFO) << "get_replica_info: cache hit, tablet_id=" << tablet_id

                              << ", job_id=" << job_id;

                    cache_hit = true;

                    continue;

                } else {

                    LOG(INFO) << "get_replica_info: cache expired, tablet_id=" << tablet_id

                              << ", job_id=" << job_id;

                    cache.erase(it);

                }

            }

            LOG(INFO) << "get_replica_info: cache miss, tablet_id=" << tablet_id

                      << ", job_id=" << job_id;

        }

        if (!cache_hit) {

            // We are trying to save one retry by refresh all the remaining caches

            bypass_cache = true;

        }

        ClusterInfo* cluster_info = ExecEnv::GetInstance()->cluster_info();

        if (cluster_info == nullptr) {

            LOG(WARNING) << "get_replica_info: have not get FE Master heartbeat yet, job_id="

                         << job_id;

            continue;

        }

        TNetworkAddress master_addr = cluster_info->master_fe_addr;

        if (master_addr.hostname == "" || master_addr.port == 0) {

            LOG(WARNING) << "get_replica_info: have not get FE Master heartbeat yet, job_id="

                         << job_id;

            continue;

        }

        TGetTabletReplicaInfosRequest request;

        TGetTabletReplicaInfosResult result;

        request.warm_up_job_id = job_id;

        request.__isset.warm_up_job_id = true;

        request.tablet_ids.emplace_back(tablet_id);

        Status rpc_st = ThriftRpcHelper::rpc<FrontendServiceClient>(

                master_addr.hostname, master_addr.port,

                [&request, &result](FrontendServiceConnection& client) {

                    client->getTabletReplicaInfos(result, request);

                });

        if (!rpc_st.ok()) {

            LOG(WARNING) << "get_replica_info: rpc failed error=" << rpc_st

                         << ", tablet id=" << tablet_id << ", job_id=" << job_id;

            continue;

        }

        auto st = Status::create(result.status);

        if (!st.ok()) {

            if (st.is<CANCELED>()) {

                LOG(INFO) << "get_replica_info: warm up job cancelled, tablet_id=" << tablet_id

                          << ", job_id=" << job_id;

                cancelled_jobs.push_back(job_id);

            } else {

                LOG(WARNING) << "get_replica_info: failed status=" << st

                             << ", tablet id=" << tablet_id << ", job_id=" << job_id;

            }

            continue;

        }

        VLOG_DEBUG << "get_replica_info: got " << result.tablet_replica_infos.size()

                   << " tablets, tablet id=" << tablet_id << ", job_id=" << job_id;

        for (const auto& it : result.tablet_replica_infos) {

            auto tid = it.first;

            VLOG_DEBUG << "get_replica_info: got " << it.second.size()

                       << " replica_infos, tablet id=" << tid << ", job_id=" << job_id;

            for (const auto& replica : it.second) {

                cache[tid] = std::make_pair(std::chrono::steady_clock::now(), replica);

                replicas.push_back(replica);

                LOG(INFO) << "get_replica_info: cache add, tablet_id=" << tid

                          << ", job_id=" << job_id;

            }

        }

    }

    for (auto job_id : cancelled_jobs) {

        LOG(INFO) << "get_replica_info: erasing cancelled job, job_id=" << job_id;

        _tablet_replica_cache.erase(job_id);

    }

    VLOG_DEBUG << "get_replica_info: return " << replicas.size()

               << " replicas, tablet id=" << tablet_id;

    return replicas;

}

void CloudWarmUpManager::warm_up_rowset(RowsetMeta& rs_meta, int64_t sync_wait_timeout_ms) {

    bthread::Mutex mu;

    bthread::ConditionVariable cv;

    std::unique_lock<bthread::Mutex> lock(mu);

    auto st = _thread_pool_token->submit_func([&, this]() {

        std::unique_lock<bthread::Mutex> l(mu);

        _warm_up_rowset(rs_meta, sync_wait_timeout_ms);

        cv.notify_one();

    });

    if (!st.ok()) {

        LOG(WARNING) << "Failed to submit warm up rowset task: " << st;

        file_cache_warm_up_failed_task_num << 1;

    } else {

        cv.wait(lock);

    }

}

void CloudWarmUpManager::_warm_up_rowset(RowsetMeta& rs_meta, int64_t sync_wait_timeout_ms) {

    bool cache_hit = false;

    auto replicas = get_replica_info(rs_meta.tablet_id(), false, cache_hit);

    if (replicas.empty()) {

        VLOG_DEBUG << "There is no need to warmup tablet=" << rs_meta.tablet_id()

                   << ", skipping rowset=" << rs_meta.rowset_id().to_string();

        g_file_cache_event_driven_warm_up_skipped_rowset_num << 1;

        return;

    }

    Status st = _do_warm_up_rowset(rs_meta, replicas, sync_wait_timeout_ms, !cache_hit);

    if (cache_hit && !st.ok() && st.is<ErrorCode::TABLE_NOT_FOUND>()) {

        replicas = get_replica_info(rs_meta.tablet_id(), true, cache_hit);

        st = _do_warm_up_rowset(rs_meta, replicas, sync_wait_timeout_ms, true);

    }

    if (!st.ok()) {

        LOG(WARNING) << "Failed to warm up rowset, tablet_id=" << rs_meta.tablet_id()

                     << ", rowset_id=" << rs_meta.rowset_id().to_string() << ", status=" << st;

    }

}

Status CloudWarmUpManager::_do_warm_up_rowset(RowsetMeta& rs_meta,

                                              std::vector<TReplicaInfo>& replicas,

                                              int64_t sync_wait_timeout_ms,

                                              bool skip_existence_check) {

    auto tablet_id = rs_meta.tablet_id();

    int64_t now_ts = std::chrono::duration_cast<std::chrono::microseconds>(

                             std::chrono::system_clock::now().time_since_epoch())

                             .count();

    g_file_cache_warm_up_rowset_last_call_unix_ts.set_value(now_ts);

    auto ret_st = Status::OK();

    PWarmUpRowsetRequest request;

    request.add_rowset_metas()->CopyFrom(rs_meta.get_rowset_pb());

    request.set_unix_ts_us(now_ts);

    request.set_sync_wait_timeout_ms(sync_wait_timeout_ms);

    request.set_skip_existence_check(skip_existence_check);

    for (auto& replica : replicas) {

        // send sync request

        std::string host = replica.host;

        auto dns_cache = ExecEnv::GetInstance()->dns_cache();

        if (dns_cache == nullptr) {

            LOG(WARNING) << "DNS cache is not initialized, skipping hostname resolve";

        } else if (!is_valid_ip(replica.host)) {

            Status status = dns_cache->get(replica.host, &host);

            if (!status.ok()) {

                LOG(WARNING) << "failed to get ip from host " << replica.host << ": "

                             << status.to_string();

                continue;

            }

        }

        std::string brpc_addr = get_host_port(host, replica.brpc_port);

        Status st = Status::OK();

        std::shared_ptr<PBackendService_Stub> brpc_stub =

                ExecEnv::GetInstance()->brpc_internal_client_cache()->get_new_client_no_cache(

                        brpc_addr);

        if (!brpc_stub) {

            st = Status::RpcError("Address {} is wrong", brpc_addr);

            continue;

        }

        // update metrics

        auto schema_ptr = rs_meta.tablet_schema();

        auto idx_version = schema_ptr->get_inverted_index_storage_format();

        for (int64_t segment_id = 0; segment_id < rs_meta.num_segments(); segment_id++) {

            g_file_cache_event_driven_warm_up_requested_segment_num << 1;

            g_file_cache_event_driven_warm_up_requested_segment_size

                    << rs_meta.segment_file_size(cast_set<int>(segment_id));

            if (schema_ptr->has_inverted_index() || schema_ptr->has_ann_index()) {

                if (idx_version == InvertedIndexStorageFormatPB::V1) {

                    auto&& inverted_index_info =

                            rs_meta.inverted_index_file_info(cast_set<int>(segment_id));

                    if (inverted_index_info.index_info().empty()) {

                        VLOG_DEBUG << "No index info available for segment " << segment_id;

                        continue;

                    }

                    for (const auto& info : inverted_index_info.index_info()) {

                        g_file_cache_event_driven_warm_up_requested_index_num << 1;

                        if (info.index_file_size() != -1) {

                            g_file_cache_event_driven_warm_up_requested_index_size

                                    << info.index_file_size();

                        } else {

                            VLOG_DEBUG << "Invalid index_file_size for segment_id " << segment_id

                                       << ", index_id " << info.index_id();

                        }

                    }

                } else { // InvertedIndexStorageFormatPB::V2

                    auto&& inverted_index_info =

                            rs_meta.inverted_index_file_info(cast_set<int>(segment_id));

                    g_file_cache_event_driven_warm_up_requested_index_num << 1;

                    if (inverted_index_info.has_index_size()) {

                        g_file_cache_event_driven_warm_up_requested_index_size

                                << inverted_index_info.index_size();

                    } else {

                        VLOG_DEBUG << "index_size is not set for segment " << segment_id;

                    }

                }

            }

        }

        brpc::Controller cntl;

        if (sync_wait_timeout_ms > 0) {

            cntl.set_timeout_ms(sync_wait_timeout_ms + 1000);

        }

        PWarmUpRowsetResponse response;

        MonotonicStopWatch watch;

        watch.start();

        brpc_stub->warm_up_rowset(&cntl, &request, &response, nullptr);

        if (cntl.Failed()) {

            LOG_WARNING("warm up rowset {} for tablet {} failed, rpc error: {}",

                        rs_meta.rowset_id().to_string(), tablet_id, cntl.ErrorText());

            return Status::RpcError(cntl.ErrorText());

        }

        if (sync_wait_timeout_ms > 0) {

            auto cost_us = watch.elapsed_time_microseconds();

            VLOG_DEBUG << "warm up rowset wait for compaction: " << cost_us << " us";

            if (cost_us / 1000 > sync_wait_timeout_ms) {

                LOG_WARNING(

                        "Warm up rowset {} for tabelt {} wait for compaction timeout, takes {} ms",

                        rs_meta.rowset_id().to_string(), tablet_id, cost_us / 1000);

            }

            g_file_cache_warm_up_rowset_wait_for_compaction_latency << cost_us;

        }

        auto status = Status::create(response.status());

        if (response.has_status() && !status.ok()) {

            LOG(INFO) << "warm_up_rowset failed, tablet_id=" << rs_meta.tablet_id()

                      << ", rowset_id=" << rs_meta.rowset_id().to_string()

                      << ", target=" << replica.host << ", skip_existence_check"

                      << skip_existence_check << ", status=" << status;

            ret_st = status;

        }

    }

    return ret_st;

}

void CloudWarmUpManager::recycle_cache(int64_t tablet_id,

                                       const std::vector<RecycledRowsets>& rowsets) {

    bthread::Mutex mu;

    bthread::ConditionVariable cv;

    std::unique_lock<bthread::Mutex> lock(mu);

    auto st = _thread_pool_token->submit_func([&, this]() {

        std::unique_lock<bthread::Mutex> l(mu);

        _recycle_cache(tablet_id, rowsets);

        cv.notify_one();

    });

    if (!st.ok()) {

        LOG(WARNING) << "Failed to submit recycle cache task, tablet_id=" << tablet_id

                     << ", error=" << st;

    } else {

        cv.wait(lock);

    }

}

void CloudWarmUpManager::_recycle_cache(int64_t tablet_id,

                                        const std::vector<RecycledRowsets>& rowsets) {

    LOG(INFO) << "recycle_cache: tablet_id=" << tablet_id << ", num_rowsets=" << rowsets.size();

    bool cache_hit = false;

    auto replicas = get_replica_info(tablet_id, false, cache_hit);

    if (replicas.empty()) {

        return;

    }

    PRecycleCacheRequest request;

    for (const auto& rowset : rowsets) {

        RecycleCacheMeta* meta = request.add_cache_metas();

        meta->set_tablet_id(tablet_id);

        meta->set_rowset_id(rowset.rowset_id.to_string());

        meta->set_num_segments(rowset.num_segments);

        for (const auto& name : rowset.index_file_names) {

            meta->add_index_file_names(name);

        }

        g_file_cache_recycle_cache_requested_segment_num << rowset.num_segments;

        g_file_cache_recycle_cache_requested_index_num << rowset.index_file_names.size();

    }

    auto dns_cache = ExecEnv::GetInstance()->dns_cache();

    for (auto& replica : replicas) {

        // send sync request

        std::string host = replica.host;

        if (dns_cache == nullptr) {

            LOG(WARNING) << "DNS cache is not initialized, skipping hostname resolve";

        } else if (!is_valid_ip(replica.host)) {

            Status status = dns_cache->get(replica.host, &host);

            if (!status.ok()) {

                LOG(WARNING) << "failed to get ip from host " << replica.host << ": "

                             << status.to_string();

                return;

            }

        }

        std::string brpc_addr = get_host_port(host, replica.brpc_port);

        Status st = Status::OK();

        std::shared_ptr<PBackendService_Stub> brpc_stub =

                ExecEnv::GetInstance()->brpc_internal_client_cache()->get_new_client_no_cache(

                        brpc_addr);

        if (!brpc_stub) {

            st = Status::RpcError("Address {} is wrong", brpc_addr);

            continue;

        }

        brpc::Controller cntl;

        PRecycleCacheResponse response;

        brpc_stub->recycle_cache(&cntl, &request, &response, nullptr);

    }

}

// Balance warm up cache management methods implementation

void CloudWarmUpManager::record_balanced_tablet(int64_t tablet_id, const std::string& host,

                                                int32_t brpc_port) {

    auto& shard = get_shard(tablet_id);

    std::lock_guard<std::mutex> lock(shard.mtx);

    JobMeta meta;

    meta.be_ip = host;

    meta.brpc_port = brpc_port;

    shard.tablets.emplace(tablet_id, std::move(meta));

    g_balance_tablet_be_mapping_size << 1;

    schedule_remove_balanced_tablet(tablet_id);

    VLOG_DEBUG << "Recorded balanced warm up cache tablet: tablet_id=" << tablet_id

               << ", host=" << host << ":" << brpc_port;

}

void CloudWarmUpManager::schedule_remove_balanced_tablet(int64_t tablet_id) {

    // Use std::make_unique to avoid raw pointer allocation

    auto tablet_id_ptr = std::make_unique<int64_t>(tablet_id);

    unsigned long expired_ms = g_tablet_report_inactive_duration_ms;

    if (doris::config::cache_read_from_peer_expired_seconds > 0 &&

        doris::config::cache_read_from_peer_expired_seconds <=

                g_tablet_report_inactive_duration_ms / 1000) {

        expired_ms = doris::config::cache_read_from_peer_expired_seconds * 1000;

    }

    bthread_timer_t timer_id;

    // ATTN: The timer callback will reclaim ownership of the tablet_id_ptr, so we need to release it after the timer is added.

    if (const int rc = bthread_timer_add(&timer_id, butil::milliseconds_from_now(expired_ms),

                                         clean_up_expired_mappings, tablet_id_ptr.get());

        rc == 0) {

        tablet_id_ptr.release();

    } else {

        LOG(WARNING) << "Fail to add timer for clean up expired mappings for tablet_id="

                     << tablet_id << " rc=" << rc;

    }

}

void CloudWarmUpManager::clean_up_expired_mappings(void* arg) {

    std::unique_ptr<int64_t> tid(static_cast<int64_t*>(arg));

    auto& manager = ExecEnv::GetInstance()->storage_engine().to_cloud().cloud_warm_up_manager();

    manager.remove_balanced_tablet(*tid);

    VLOG_DEBUG << "Removed expired balanced warm up cache tablet: tablet_id=" << *tid;

}

std::optional<std::pair<std::string, int32_t>> CloudWarmUpManager::get_balanced_tablet_info(

        int64_t tablet_id) {

    auto& shard = get_shard(tablet_id);

    std::lock_guard<std::mutex> lock(shard.mtx);

    auto it = shard.tablets.find(tablet_id);

    if (it == shard.tablets.end()) {

        return std::nullopt;

    }

    return std::make_pair(it->second.be_ip, it->second.brpc_port);

}

void CloudWarmUpManager::remove_balanced_tablet(int64_t tablet_id) {

    auto& shard = get_shard(tablet_id);

    std::lock_guard<std::mutex> lock(shard.mtx);

    auto it = shard.tablets.find(tablet_id);

    if (it != shard.tablets.end()) {

        shard.tablets.erase(it);

        g_balance_tablet_be_mapping_size << -1;

        VLOG_DEBUG << "Removed balanced warm up cache tablet by timer, tablet_id=" << tablet_id;

    }

}

void CloudWarmUpManager::remove_balanced_tablets(const std::vector<int64_t>& tablet_ids) {

    // Group tablet_ids by shard to minimize lock contention

    std::array<std::vector<int64_t>, SHARD_COUNT> shard_groups;

    for (int64_t tablet_id : tablet_ids) {

        shard_groups[get_shard_index(tablet_id)].push_back(tablet_id);

    }

    // Process each shard

    for (size_t i = 0; i < SHARD_COUNT; ++i) {

        if (shard_groups[i].empty()) continue;

        auto& shard = _balanced_tablets_shards[i];

        std::lock_guard<std::mutex> lock(shard.mtx);

        for (int64_t tablet_id : shard_groups[i]) {

            auto it = shard.tablets.find(tablet_id);

            if (it != shard.tablets.end()) {