github-actions[bot] commented on code in PR #30089:
URL: https://github.com/apache/doris/pull/30089#discussion_r1456781051


##########
be/src/cloud/cloud_tablet_mgr.h:
##########
@@ -0,0 +1,68 @@
+// 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.
+
+#pragma once
+
+namespace doris {
+
+class CloudTablet;
+class CloudStorageEngine;
+class LRUCachePolicy;
+
+class CloudTabletMgr {
+public:
+    CloudTabletMgr(CloudStorageEngine& engine);
+    ~CloudTabletMgr();
+
+    // If the tablet is in cache, return this tablet directly; otherwise will 
get tablet meta first,
+    // sync rowsets after, and download segment data in background if 
`warmup_data` is true.
+    Result<std::shared_ptr<CloudTablet>> get_tablet(int64_t tablet_id, bool 
warmup_data = false);
+
+    void erase_tablet(int64_t tablet_id);

Review Comment:
   warning: unknown type name 'int64_t' [clang-diagnostic-error]
   ```cpp
       void erase_tablet(int64_t tablet_id);
                         ^
   ```
   



##########
be/src/cloud/cloud_tablet_mgr.h:
##########
@@ -0,0 +1,68 @@
+// 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.
+
+#pragma once
+
+namespace doris {
+
+class CloudTablet;
+class CloudStorageEngine;
+class LRUCachePolicy;
+
+class CloudTabletMgr {
+public:
+    CloudTabletMgr(CloudStorageEngine& engine);
+    ~CloudTabletMgr();
+
+    // If the tablet is in cache, return this tablet directly; otherwise will 
get tablet meta first,
+    // sync rowsets after, and download segment data in background if 
`warmup_data` is true.
+    Result<std::shared_ptr<CloudTablet>> get_tablet(int64_t tablet_id, bool 
warmup_data = false);
+
+    void erase_tablet(int64_t tablet_id);
+
+    void vacuum_stale_rowsets();
+
+    // Return weak ptr of all cached tablets.
+    // We return weak ptr to avoid extend lifetime of tablets that are no 
longer cached.
+    std::vector<std::weak_ptr<CloudTablet>> get_weak_tablets();
+
+    void sync_tablets();
+
+    /**
+     * Gets top N tablets that are considered to be compacted first
+     *
+     * @param n max number of tablets to get, all of them are comapction 
enabled
+     * @param filter_out a filter takes a tablet and return bool to check
+     *                   whether skipping the tablet, true for skip
+     * @param tablets output param
+     * @param max_score output param, max score of existed tablets
+     * @return status of this call
+     */
+    Status get_topn_tablets_to_compact(int n, CompactionType compaction_type,
+                                       const 
std::function<bool(CloudTablet*)>& filter_out,
+                                       
std::vector<std::shared_ptr<CloudTablet>>* tablets,

Review Comment:
   warning: expected ')' [clang-diagnostic-error]
   ```cpp
                                          
std::vector<std::shared_ptr<CloudTablet>>* tablets,
                                                                                
  ^
   ```
   <details>
   <summary>Additional context</summary>
   
   **be/src/cloud/cloud_tablet_mgr.h:54:** to match this '('
   ```cpp
       Status get_topn_tablets_to_compact(int n, CompactionType compaction_type,
                                         ^
   ```
   
   </details>
   



##########
be/src/cloud/cloud_tablet_mgr.h:
##########
@@ -0,0 +1,68 @@
+// 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.
+
+#pragma once
+
+namespace doris {
+
+class CloudTablet;
+class CloudStorageEngine;
+class LRUCachePolicy;
+
+class CloudTabletMgr {
+public:
+    CloudTabletMgr(CloudStorageEngine& engine);
+    ~CloudTabletMgr();
+
+    // If the tablet is in cache, return this tablet directly; otherwise will 
get tablet meta first,
+    // sync rowsets after, and download segment data in background if 
`warmup_data` is true.
+    Result<std::shared_ptr<CloudTablet>> get_tablet(int64_t tablet_id, bool 
warmup_data = false);

Review Comment:
   warning: 'CloudTablet' does not refer to a value [clang-diagnostic-error]
   ```cpp
       Result<std::shared_ptr<CloudTablet>> get_tablet(int64_t tablet_id, bool 
warmup_data = false);
                              ^
   ```
   <details>
   <summary>Additional context</summary>
   
   **be/src/cloud/cloud_tablet_mgr.h:21:** declared here
   ```cpp
   class CloudTablet;
         ^
   ```
   
   </details>
   



##########
be/src/cloud/cloud_tablet_mgr.h:
##########
@@ -0,0 +1,68 @@
+// 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.
+
+#pragma once
+
+namespace doris {
+
+class CloudTablet;
+class CloudStorageEngine;
+class LRUCachePolicy;
+
+class CloudTabletMgr {
+public:
+    CloudTabletMgr(CloudStorageEngine& engine);
+    ~CloudTabletMgr();
+
+    // If the tablet is in cache, return this tablet directly; otherwise will 
get tablet meta first,
+    // sync rowsets after, and download segment data in background if 
`warmup_data` is true.
+    Result<std::shared_ptr<CloudTablet>> get_tablet(int64_t tablet_id, bool 
warmup_data = false);

Review Comment:
   warning: use of undeclared identifier 'std' [clang-diagnostic-error]
   ```cpp
       Result<std::shared_ptr<CloudTablet>> get_tablet(int64_t tablet_id, bool 
warmup_data = false);
              ^
   ```
   



##########
be/src/cloud/cloud_tablet_mgr.cpp:
##########
@@ -0,0 +1,356 @@
+// 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_tablet_mgr.h"
+
+#include <bthread/countdown_event.h>

Review Comment:
   warning: 'bthread/countdown_event.h' file not found [clang-diagnostic-error]
   ```cpp
   #include <bthread/countdown_event.h>
            ^
   ```
   



##########
be/src/cloud/cloud_tablet_mgr.h:
##########
@@ -0,0 +1,68 @@
+// 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.
+
+#pragma once
+
+namespace doris {
+
+class CloudTablet;
+class CloudStorageEngine;
+class LRUCachePolicy;
+
+class CloudTabletMgr {
+public:
+    CloudTabletMgr(CloudStorageEngine& engine);
+    ~CloudTabletMgr();
+
+    // If the tablet is in cache, return this tablet directly; otherwise will 
get tablet meta first,
+    // sync rowsets after, and download segment data in background if 
`warmup_data` is true.
+    Result<std::shared_ptr<CloudTablet>> get_tablet(int64_t tablet_id, bool 
warmup_data = false);
+
+    void erase_tablet(int64_t tablet_id);
+
+    void vacuum_stale_rowsets();
+
+    // Return weak ptr of all cached tablets.
+    // We return weak ptr to avoid extend lifetime of tablets that are no 
longer cached.
+    std::vector<std::weak_ptr<CloudTablet>> get_weak_tablets();

Review Comment:
   warning: use of undeclared identifier 'std' [clang-diagnostic-error]
   ```cpp
       std::vector<std::weak_ptr<CloudTablet>> get_weak_tablets();
       ^
   ```
   



##########
be/src/cloud/cloud_tablet_mgr.h:
##########
@@ -0,0 +1,68 @@
+// 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.
+
+#pragma once
+
+namespace doris {
+
+class CloudTablet;
+class CloudStorageEngine;
+class LRUCachePolicy;
+
+class CloudTabletMgr {
+public:
+    CloudTabletMgr(CloudStorageEngine& engine);
+    ~CloudTabletMgr();
+
+    // If the tablet is in cache, return this tablet directly; otherwise will 
get tablet meta first,
+    // sync rowsets after, and download segment data in background if 
`warmup_data` is true.
+    Result<std::shared_ptr<CloudTablet>> get_tablet(int64_t tablet_id, bool 
warmup_data = false);

Review Comment:
   warning: expected member name or ';' after declaration specifiers 
[clang-diagnostic-error]
   ```cpp
       Result<std::shared_ptr<CloudTablet>> get_tablet(int64_t tablet_id, bool 
warmup_data = false);
                                          ^
   ```
   



##########
be/src/cloud/cloud_tablet_mgr.h:
##########
@@ -0,0 +1,68 @@
+// 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.
+
+#pragma once
+
+namespace doris {
+
+class CloudTablet;
+class CloudStorageEngine;
+class LRUCachePolicy;
+
+class CloudTabletMgr {
+public:
+    CloudTabletMgr(CloudStorageEngine& engine);
+    ~CloudTabletMgr();
+
+    // If the tablet is in cache, return this tablet directly; otherwise will 
get tablet meta first,
+    // sync rowsets after, and download segment data in background if 
`warmup_data` is true.
+    Result<std::shared_ptr<CloudTablet>> get_tablet(int64_t tablet_id, bool 
warmup_data = false);
+
+    void erase_tablet(int64_t tablet_id);
+
+    void vacuum_stale_rowsets();
+
+    // Return weak ptr of all cached tablets.
+    // We return weak ptr to avoid extend lifetime of tablets that are no 
longer cached.
+    std::vector<std::weak_ptr<CloudTablet>> get_weak_tablets();

Review Comment:
   warning: 'CloudTablet' does not refer to a value [clang-diagnostic-error]
   ```cpp
       std::vector<std::weak_ptr<CloudTablet>> get_weak_tablets();
                                 ^
   ```
   <details>
   <summary>Additional context</summary>
   
   **be/src/cloud/cloud_tablet_mgr.h:21:** declared here
   ```cpp
   class CloudTablet;
         ^
   ```
   
   </details>
   



##########
be/src/cloud/cloud_tablet_mgr.h:
##########
@@ -0,0 +1,68 @@
+// 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.
+
+#pragma once
+
+namespace doris {
+
+class CloudTablet;
+class CloudStorageEngine;
+class LRUCachePolicy;
+
+class CloudTabletMgr {
+public:
+    CloudTabletMgr(CloudStorageEngine& engine);
+    ~CloudTabletMgr();
+
+    // If the tablet is in cache, return this tablet directly; otherwise will 
get tablet meta first,
+    // sync rowsets after, and download segment data in background if 
`warmup_data` is true.
+    Result<std::shared_ptr<CloudTablet>> get_tablet(int64_t tablet_id, bool 
warmup_data = false);
+
+    void erase_tablet(int64_t tablet_id);
+
+    void vacuum_stale_rowsets();
+
+    // Return weak ptr of all cached tablets.
+    // We return weak ptr to avoid extend lifetime of tablets that are no 
longer cached.
+    std::vector<std::weak_ptr<CloudTablet>> get_weak_tablets();

Review Comment:
   warning: expected member name or ';' after declaration specifiers 
[clang-diagnostic-error]
   ```cpp
       std::vector<std::weak_ptr<CloudTablet>> get_weak_tablets();
                                             ^
   ```
   



##########
be/src/cloud/cloud_tablet_mgr.h:
##########
@@ -0,0 +1,68 @@
+// 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.
+
+#pragma once
+
+namespace doris {
+
+class CloudTablet;
+class CloudStorageEngine;
+class LRUCachePolicy;
+
+class CloudTabletMgr {
+public:
+    CloudTabletMgr(CloudStorageEngine& engine);
+    ~CloudTabletMgr();
+
+    // If the tablet is in cache, return this tablet directly; otherwise will 
get tablet meta first,
+    // sync rowsets after, and download segment data in background if 
`warmup_data` is true.
+    Result<std::shared_ptr<CloudTablet>> get_tablet(int64_t tablet_id, bool 
warmup_data = false);
+
+    void erase_tablet(int64_t tablet_id);
+
+    void vacuum_stale_rowsets();
+
+    // Return weak ptr of all cached tablets.
+    // We return weak ptr to avoid extend lifetime of tablets that are no 
longer cached.
+    std::vector<std::weak_ptr<CloudTablet>> get_weak_tablets();

Review Comment:
   warning: use of undeclared identifier 'std' [clang-diagnostic-error]
   ```cpp
       std::vector<std::weak_ptr<CloudTablet>> get_weak_tablets();
                   ^
   ```
   



##########
be/src/cloud/cloud_tablet_mgr.h:
##########
@@ -0,0 +1,68 @@
+// 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.
+
+#pragma once
+
+namespace doris {
+
+class CloudTablet;
+class CloudStorageEngine;
+class LRUCachePolicy;
+
+class CloudTabletMgr {
+public:
+    CloudTabletMgr(CloudStorageEngine& engine);
+    ~CloudTabletMgr();
+
+    // If the tablet is in cache, return this tablet directly; otherwise will 
get tablet meta first,
+    // sync rowsets after, and download segment data in background if 
`warmup_data` is true.
+    Result<std::shared_ptr<CloudTablet>> get_tablet(int64_t tablet_id, bool 
warmup_data = false);
+
+    void erase_tablet(int64_t tablet_id);
+
+    void vacuum_stale_rowsets();
+
+    // Return weak ptr of all cached tablets.
+    // We return weak ptr to avoid extend lifetime of tablets that are no 
longer cached.
+    std::vector<std::weak_ptr<CloudTablet>> get_weak_tablets();
+
+    void sync_tablets();
+
+    /**
+     * Gets top N tablets that are considered to be compacted first
+     *
+     * @param n max number of tablets to get, all of them are comapction 
enabled
+     * @param filter_out a filter takes a tablet and return bool to check
+     *                   whether skipping the tablet, true for skip
+     * @param tablets output param
+     * @param max_score output param, max score of existed tablets
+     * @return status of this call
+     */
+    Status get_topn_tablets_to_compact(int n, CompactionType compaction_type,

Review Comment:
   warning: unknown type name 'Status' [clang-diagnostic-error]
   ```cpp
       Status get_topn_tablets_to_compact(int n, CompactionType compaction_type,
       ^
   ```
   



##########
be/src/cloud/cloud_tablet_mgr.h:
##########
@@ -0,0 +1,68 @@
+// 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.
+
+#pragma once
+
+namespace doris {
+
+class CloudTablet;
+class CloudStorageEngine;
+class LRUCachePolicy;
+
+class CloudTabletMgr {
+public:
+    CloudTabletMgr(CloudStorageEngine& engine);
+    ~CloudTabletMgr();
+
+    // If the tablet is in cache, return this tablet directly; otherwise will 
get tablet meta first,
+    // sync rowsets after, and download segment data in background if 
`warmup_data` is true.
+    Result<std::shared_ptr<CloudTablet>> get_tablet(int64_t tablet_id, bool 
warmup_data = false);
+
+    void erase_tablet(int64_t tablet_id);
+
+    void vacuum_stale_rowsets();
+
+    // Return weak ptr of all cached tablets.
+    // We return weak ptr to avoid extend lifetime of tablets that are no 
longer cached.
+    std::vector<std::weak_ptr<CloudTablet>> get_weak_tablets();
+
+    void sync_tablets();
+
+    /**
+     * Gets top N tablets that are considered to be compacted first
+     *
+     * @param n max number of tablets to get, all of them are comapction 
enabled
+     * @param filter_out a filter takes a tablet and return bool to check
+     *                   whether skipping the tablet, true for skip
+     * @param tablets output param
+     * @param max_score output param, max score of existed tablets
+     * @return status of this call
+     */
+    Status get_topn_tablets_to_compact(int n, CompactionType compaction_type,
+                                       const 
std::function<bool(CloudTablet*)>& filter_out,

Review Comment:
   warning: use of undeclared identifier 'std' [clang-diagnostic-error]
   ```cpp
                                          const 
std::function<bool(CloudTablet*)>& filter_out,
                                                ^
   ```
   



##########
be/src/cloud/cloud_tablet_mgr.h:
##########
@@ -0,0 +1,68 @@
+// 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.
+
+#pragma once
+
+namespace doris {
+
+class CloudTablet;
+class CloudStorageEngine;
+class LRUCachePolicy;
+
+class CloudTabletMgr {
+public:
+    CloudTabletMgr(CloudStorageEngine& engine);
+    ~CloudTabletMgr();
+
+    // If the tablet is in cache, return this tablet directly; otherwise will 
get tablet meta first,
+    // sync rowsets after, and download segment data in background if 
`warmup_data` is true.
+    Result<std::shared_ptr<CloudTablet>> get_tablet(int64_t tablet_id, bool 
warmup_data = false);
+
+    void erase_tablet(int64_t tablet_id);
+
+    void vacuum_stale_rowsets();
+
+    // Return weak ptr of all cached tablets.
+    // We return weak ptr to avoid extend lifetime of tablets that are no 
longer cached.
+    std::vector<std::weak_ptr<CloudTablet>> get_weak_tablets();
+
+    void sync_tablets();
+
+    /**
+     * Gets top N tablets that are considered to be compacted first
+     *
+     * @param n max number of tablets to get, all of them are comapction 
enabled
+     * @param filter_out a filter takes a tablet and return bool to check
+     *                   whether skipping the tablet, true for skip
+     * @param tablets output param
+     * @param max_score output param, max score of existed tablets
+     * @return status of this call
+     */
+    Status get_topn_tablets_to_compact(int n, CompactionType compaction_type,
+                                       const 
std::function<bool(CloudTablet*)>& filter_out,
+                                       
std::vector<std::shared_ptr<CloudTablet>>* tablets,

Review Comment:
   warning: use of undeclared identifier 'std' [clang-diagnostic-error]
   ```cpp
                                          
std::vector<std::shared_ptr<CloudTablet>>* tablets,
                                          ^
   ```
   



##########
be/src/cloud/cloud_tablet_mgr.h:
##########
@@ -0,0 +1,68 @@
+// 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.
+
+#pragma once
+
+namespace doris {
+
+class CloudTablet;
+class CloudStorageEngine;
+class LRUCachePolicy;
+
+class CloudTabletMgr {
+public:
+    CloudTabletMgr(CloudStorageEngine& engine);
+    ~CloudTabletMgr();
+
+    // If the tablet is in cache, return this tablet directly; otherwise will 
get tablet meta first,
+    // sync rowsets after, and download segment data in background if 
`warmup_data` is true.
+    Result<std::shared_ptr<CloudTablet>> get_tablet(int64_t tablet_id, bool 
warmup_data = false);
+
+    void erase_tablet(int64_t tablet_id);
+
+    void vacuum_stale_rowsets();
+
+    // Return weak ptr of all cached tablets.
+    // We return weak ptr to avoid extend lifetime of tablets that are no 
longer cached.
+    std::vector<std::weak_ptr<CloudTablet>> get_weak_tablets();
+
+    void sync_tablets();
+
+    /**
+     * Gets top N tablets that are considered to be compacted first
+     *
+     * @param n max number of tablets to get, all of them are comapction 
enabled
+     * @param filter_out a filter takes a tablet and return bool to check
+     *                   whether skipping the tablet, true for skip
+     * @param tablets output param
+     * @param max_score output param, max score of existed tablets
+     * @return status of this call
+     */
+    Status get_topn_tablets_to_compact(int n, CompactionType compaction_type,
+                                       const 
std::function<bool(CloudTablet*)>& filter_out,
+                                       
std::vector<std::shared_ptr<CloudTablet>>* tablets,
+                                       int64_t* max_score);
+
+private:
+    CloudStorageEngine& _engine;
+
+    class TabletMap;
+    std::unique_ptr<TabletMap> _tablet_map;

Review Comment:
   warning: use of undeclared identifier 'std' [clang-diagnostic-error]
   ```cpp
       std::unique_ptr<TabletMap> _tablet_map;
       ^
   ```
   



##########
be/src/cloud/cloud_tablet_mgr.h:
##########
@@ -0,0 +1,68 @@
+// 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.
+
+#pragma once
+
+namespace doris {
+
+class CloudTablet;
+class CloudStorageEngine;
+class LRUCachePolicy;
+
+class CloudTabletMgr {
+public:
+    CloudTabletMgr(CloudStorageEngine& engine);
+    ~CloudTabletMgr();
+
+    // If the tablet is in cache, return this tablet directly; otherwise will 
get tablet meta first,
+    // sync rowsets after, and download segment data in background if 
`warmup_data` is true.
+    Result<std::shared_ptr<CloudTablet>> get_tablet(int64_t tablet_id, bool 
warmup_data = false);
+
+    void erase_tablet(int64_t tablet_id);
+
+    void vacuum_stale_rowsets();
+
+    // Return weak ptr of all cached tablets.
+    // We return weak ptr to avoid extend lifetime of tablets that are no 
longer cached.
+    std::vector<std::weak_ptr<CloudTablet>> get_weak_tablets();
+
+    void sync_tablets();
+
+    /**
+     * Gets top N tablets that are considered to be compacted first
+     *
+     * @param n max number of tablets to get, all of them are comapction 
enabled
+     * @param filter_out a filter takes a tablet and return bool to check
+     *                   whether skipping the tablet, true for skip
+     * @param tablets output param
+     * @param max_score output param, max score of existed tablets
+     * @return status of this call
+     */
+    Status get_topn_tablets_to_compact(int n, CompactionType compaction_type,

Review Comment:
   warning: unknown type name 'CompactionType' [clang-diagnostic-error]
   ```cpp
       Status get_topn_tablets_to_compact(int n, CompactionType compaction_type,
                                                 ^
   ```
   



##########
be/src/cloud/cloud_tablet_mgr.h:
##########
@@ -0,0 +1,68 @@
+// 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.
+
+#pragma once
+
+namespace doris {
+
+class CloudTablet;
+class CloudStorageEngine;
+class LRUCachePolicy;
+
+class CloudTabletMgr {
+public:
+    CloudTabletMgr(CloudStorageEngine& engine);
+    ~CloudTabletMgr();
+
+    // If the tablet is in cache, return this tablet directly; otherwise will 
get tablet meta first,
+    // sync rowsets after, and download segment data in background if 
`warmup_data` is true.
+    Result<std::shared_ptr<CloudTablet>> get_tablet(int64_t tablet_id, bool 
warmup_data = false);
+
+    void erase_tablet(int64_t tablet_id);
+
+    void vacuum_stale_rowsets();
+
+    // Return weak ptr of all cached tablets.
+    // We return weak ptr to avoid extend lifetime of tablets that are no 
longer cached.
+    std::vector<std::weak_ptr<CloudTablet>> get_weak_tablets();
+
+    void sync_tablets();
+
+    /**
+     * Gets top N tablets that are considered to be compacted first
+     *
+     * @param n max number of tablets to get, all of them are comapction 
enabled
+     * @param filter_out a filter takes a tablet and return bool to check
+     *                   whether skipping the tablet, true for skip
+     * @param tablets output param
+     * @param max_score output param, max score of existed tablets
+     * @return status of this call
+     */
+    Status get_topn_tablets_to_compact(int n, CompactionType compaction_type,
+                                       const 
std::function<bool(CloudTablet*)>& filter_out,
+                                       
std::vector<std::shared_ptr<CloudTablet>>* tablets,

Review Comment:
   warning: use of undeclared identifier 'std' [clang-diagnostic-error]
   ```cpp
                                          
std::vector<std::shared_ptr<CloudTablet>>* tablets,
                                                      ^
   ```
   



##########
be/src/cloud/cloud_tablet_mgr.h:
##########
@@ -0,0 +1,68 @@
+// 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.
+
+#pragma once
+
+namespace doris {
+
+class CloudTablet;
+class CloudStorageEngine;
+class LRUCachePolicy;
+
+class CloudTabletMgr {
+public:
+    CloudTabletMgr(CloudStorageEngine& engine);
+    ~CloudTabletMgr();
+
+    // If the tablet is in cache, return this tablet directly; otherwise will 
get tablet meta first,
+    // sync rowsets after, and download segment data in background if 
`warmup_data` is true.
+    Result<std::shared_ptr<CloudTablet>> get_tablet(int64_t tablet_id, bool 
warmup_data = false);
+
+    void erase_tablet(int64_t tablet_id);
+
+    void vacuum_stale_rowsets();
+
+    // Return weak ptr of all cached tablets.
+    // We return weak ptr to avoid extend lifetime of tablets that are no 
longer cached.
+    std::vector<std::weak_ptr<CloudTablet>> get_weak_tablets();
+
+    void sync_tablets();
+
+    /**
+     * Gets top N tablets that are considered to be compacted first
+     *
+     * @param n max number of tablets to get, all of them are comapction 
enabled
+     * @param filter_out a filter takes a tablet and return bool to check
+     *                   whether skipping the tablet, true for skip
+     * @param tablets output param
+     * @param max_score output param, max score of existed tablets
+     * @return status of this call
+     */
+    Status get_topn_tablets_to_compact(int n, CompactionType compaction_type,
+                                       const 
std::function<bool(CloudTablet*)>& filter_out,
+                                       
std::vector<std::shared_ptr<CloudTablet>>* tablets,

Review Comment:
   warning: 'CloudTablet' does not refer to a value [clang-diagnostic-error]
   ```cpp
                                          
std::vector<std::shared_ptr<CloudTablet>>* tablets,
                                                                      ^
   ```
   <details>
   <summary>Additional context</summary>
   
   **be/src/cloud/cloud_tablet_mgr.h:21:** declared here
   ```cpp
   class CloudTablet;
         ^
   ```
   
   </details>
   



##########
be/src/cloud/cloud_tablet_mgr.h:
##########
@@ -0,0 +1,68 @@
+// 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.
+
+#pragma once
+
+namespace doris {
+
+class CloudTablet;
+class CloudStorageEngine;
+class LRUCachePolicy;
+
+class CloudTabletMgr {
+public:
+    CloudTabletMgr(CloudStorageEngine& engine);
+    ~CloudTabletMgr();
+
+    // If the tablet is in cache, return this tablet directly; otherwise will 
get tablet meta first,
+    // sync rowsets after, and download segment data in background if 
`warmup_data` is true.
+    Result<std::shared_ptr<CloudTablet>> get_tablet(int64_t tablet_id, bool 
warmup_data = false);
+
+    void erase_tablet(int64_t tablet_id);
+
+    void vacuum_stale_rowsets();
+
+    // Return weak ptr of all cached tablets.
+    // We return weak ptr to avoid extend lifetime of tablets that are no 
longer cached.
+    std::vector<std::weak_ptr<CloudTablet>> get_weak_tablets();
+
+    void sync_tablets();
+
+    /**
+     * Gets top N tablets that are considered to be compacted first
+     *
+     * @param n max number of tablets to get, all of them are comapction 
enabled
+     * @param filter_out a filter takes a tablet and return bool to check
+     *                   whether skipping the tablet, true for skip
+     * @param tablets output param
+     * @param max_score output param, max score of existed tablets
+     * @return status of this call
+     */
+    Status get_topn_tablets_to_compact(int n, CompactionType compaction_type,
+                                       const 
std::function<bool(CloudTablet*)>& filter_out,
+                                       
std::vector<std::shared_ptr<CloudTablet>>* tablets,
+                                       int64_t* max_score);
+
+private:
+    CloudStorageEngine& _engine;
+
+    class TabletMap;
+    std::unique_ptr<TabletMap> _tablet_map;
+    std::unique_ptr<LRUCachePolicy> _cache;

Review Comment:
   warning: use of undeclared identifier 'std' [clang-diagnostic-error]
   ```cpp
       std::unique_ptr<LRUCachePolicy> _cache;
       ^
   ```
   



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