BiteTheDDDDt commented on code in PR #64851:
URL: https://github.com/apache/doris/pull/64851#discussion_r3473431687


##########
be/src/exec/runtime_filter/runtime_filter_mgr.cpp:
##########
@@ -48,6 +51,219 @@
 
 namespace doris {
 
+namespace {
+
+constexpr int DEFAULT_RUNTIME_FILTER_TREE_PUBLISH_FANOUT = 4;
+constexpr int MAX_RUNTIME_FILTER_TREE_PUBLISH_FANOUT = 128;
+constexpr int64_t DEFAULT_RUNTIME_FILTER_TREE_PUBLISH_MAX_SEND_BYTES = 256L * 
1024L * 1024L;
+
+TNetworkAddress to_thrift_network_address(const PNetworkAddress& address) {
+    TNetworkAddress result;
+    result.hostname = address.hostname();
+    result.port = address.port();
+    return result;
+}
+
+PNetworkAddress to_proto_network_address(const TNetworkAddress& address) {
+    PNetworkAddress result;
+    result.set_hostname(address.hostname);
+    result.set_port(address.port);
+    return result;
+}
+
+bool can_use_tree_publish_targets(const 
std::vector<TRuntimeFilterTargetParamsV2>& targets) {
+    return std::all_of(targets.begin(), targets.end(), [](const auto& target) {
+        return target.__isset.target_fragment_ids && 
!target.target_fragment_ids.empty();
+    });
+}
+
+std::vector<RuntimeFilterPublishTarget> build_runtime_filter_publish_targets(
+        const std::vector<TRuntimeFilterTargetParamsV2>& targets) {
+    std::vector<RuntimeFilterPublishTarget> publish_targets;
+    publish_targets.reserve(targets.size());
+    for (const auto& target : targets) {
+        DORIS_CHECK(target.__isset.target_fragment_ids);
+        DORIS_CHECK(!target.target_fragment_ids.empty());
+        RuntimeFilterPublishTarget publish_target;
+        publish_target.addr = 
to_proto_network_address(target.target_fragment_instance_addr);
+        publish_target.fragment_ids = target.target_fragment_ids;
+        publish_targets.emplace_back(std::move(publish_target));
+    }
+    return publish_targets;
+}
+
+class RuntimeFilterRelayRpcClosure final : public google::protobuf::Closure {
+public:
+    explicit 
RuntimeFilterRelayRpcClosure(std::shared_ptr<PPublishFilterRequestV2> request)
+            : _request(std::move(request)) {}
+
+    void Run() override {
+        std::unique_ptr<RuntimeFilterRelayRpcClosure> self(this);
+        if (_cntl->Failed()) {
+            LOG(WARNING) << "Runtime filter relay rpc failed: " << 
_cntl->ErrorText();
+            return;
+        }
+        Status st = Status::create(_response->status());
+        if (!st.ok() && !st.is<ErrorCode::END_OF_FILE>()) {
+            LOG(WARNING) << "Runtime filter relay rpc returns error status: " 
<< st;
+        }
+    }
+
+    brpc::Controller* cntl() { return _cntl.get(); }
+    PPublishFilterRequestV2* request() { return _request.get(); }
+    PPublishFilterResponse* response() { return _response.get(); }
+
+private:
+    std::unique_ptr<brpc::Controller> _cntl = 
std::make_unique<brpc::Controller>();
+    std::shared_ptr<PPublishFilterRequestV2> _request;
+    std::unique_ptr<PPublishFilterResponse> _response = 
std::make_unique<PPublishFilterResponse>();
+};
+
+void send_runtime_filter_relay_rpc(const RuntimeFilterPublishTask& task,
+                                   const butil::IOBuf& request_attachment, int 
timeout_ms) {
+    TNetworkAddress address = to_thrift_network_address(task.receiver.addr);
+    std::shared_ptr<PBackendService_Stub> stub(
+            
ExecEnv::GetInstance()->brpc_internal_client_cache()->get_client(address));
+    if (stub == nullptr) {
+        LOG(WARNING) << "Failed to init runtime filter relay rpc to " << 
address.hostname << ":"
+                     << address.port;
+        return;
+    }
+
+    auto* closure = new RuntimeFilterRelayRpcClosure(
+            std::make_shared<PPublishFilterRequestV2>(task.request));
+    if (request_attachment.size() > 0) {
+        closure->cntl()->request_attachment().append(request_attachment);
+    }
+    closure->cntl()->set_timeout_ms(timeout_ms);
+    if (config::execution_ignore_eovercrowded) {
+        closure->cntl()->ignore_eovercrowded();
+    }
+    stub->apply_filterv2(closure->cntl(), closure->request(), 
closure->response(), closure);
+}
+
+void set_request_legacy_target(const TRuntimeFilterTargetParamsV2& target,
+                               PPublishFilterRequestV2* request) {
+    if (target.__isset.target_fragment_ids) {
+        for (const auto& target_fragment_id : target.target_fragment_ids) {
+            request->add_fragment_ids(target_fragment_id);
+        }
+    } else {
+        // FE not upgraded yet.
+        for (const auto& target_fragment_instance_id : 
target.target_fragment_instance_ids) {
+            PUniqueId* cur_id = request->add_fragment_instance_ids();
+            cur_id->set_hi(target_fragment_instance_id.hi);
+            cur_id->set_lo(target_fragment_instance_id.lo);
+        }
+    }
+}
+
+} // namespace
+
+std::vector<std::vector<RuntimeFilterPublishTarget>> 
split_runtime_filter_publish_targets(
+        const std::vector<RuntimeFilterPublishTarget>& targets, int fanout) {
+    if (targets.empty()) {
+        return {};
+    }
+
+    DORIS_CHECK(fanout > 0);
+    size_t slice_count = std::min(targets.size(), static_cast<size_t>(fanout));
+    std::vector<std::vector<RuntimeFilterPublishTarget>> slices;
+    slices.reserve(slice_count);
+    for (size_t offset = 0; offset < targets.size();) {
+        size_t remaining_targets = targets.size() - offset;
+        size_t remaining_slices = slice_count - slices.size();
+        size_t slice_size = (remaining_targets + remaining_slices - 1) / 
remaining_slices;
+        slices.emplace_back(targets.begin() + offset, targets.begin() + offset 
+ slice_size);
+        offset += slice_size;
+    }
+    return slices;
+}
+
+std::vector<RuntimeFilterPublishTask> build_runtime_filter_publish_tasks(
+        const PPublishFilterRequestV2& base_request,
+        const std::vector<RuntimeFilterPublishTarget>& targets, int fanout) {
+    std::vector<RuntimeFilterPublishTask> tasks;
+    auto slices = split_runtime_filter_publish_targets(targets, fanout);
+    tasks.reserve(slices.size());
+    for (const auto& slice : slices) {
+        DORIS_CHECK(!slice.empty());
+        RuntimeFilterPublishTask task;
+        task.receiver = slice.front();
+        task.request = base_request;
+        task.request.clear_fragment_ids();
+        task.request.clear_fragment_instance_ids();

Review Comment:
   这些clear,有必要吗?不是一开始创建出来就应该是空的吗



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