platoneko commented on code in PR #31215:
URL: https://github.com/apache/doris/pull/31215#discussion_r1508810111


##########
be/src/olap/compaction.cpp:
##########
@@ -846,4 +851,80 @@ void Compaction::_load_segment_to_cache() {
     }
 }
 
+void CloudCompactionMixin::build_basic_info() {
+    _output_version =
+            Version(_input_rowsets.front()->start_version(), 
_input_rowsets.back()->end_version());
+
+    _newest_write_timestamp = _input_rowsets.back()->newest_write_timestamp();
+
+    std::vector<RowsetMetaSharedPtr> rowset_metas(_input_rowsets.size());
+    std::transform(_input_rowsets.begin(), _input_rowsets.end(), 
rowset_metas.begin(),
+                   [](const RowsetSharedPtr& rowset) { return 
rowset->rowset_meta(); });
+    _cur_tablet_schema = 
_tablet->tablet_schema_with_merged_max_schema_version(rowset_metas);
+}
+
+int64_t CloudCompactionMixin::get_compaction_permits() {
+    int64_t permits = 0;
+    for (auto&& rowset : _input_rowsets) {
+        permits += rowset->rowset_meta()->get_compaction_score();
+    }
+    return permits;
+}
+
+CloudCompactionMixin::CloudCompactionMixin(CloudStorageEngine& engine, 
CloudTabletSPtr tablet,
+                                           const std::string& label)
+        : Compaction(tablet, label), _engine(engine) {}
+
+Status CloudCompactionMixin::execute_compact_impl(int64_t permits) {
+    OlapStopWatch watch;
+
+    build_basic_info();
+
+    LOG(INFO) << "start " << compaction_name() << ". tablet=" << 
_tablet->tablet_id()
+              << ", output_version=" << _output_version << ", permits: " << 
permits;
+
+    RETURN_IF_ERROR(merge_input_rowsets());
+
+    
RETURN_IF_ERROR(_engine.meta_mgr().commit_rowset(*_output_rowset->rowset_meta().get(),
 true));
+
+    // 4. modify rowsets in memory
+    RETURN_IF_ERROR(modify_rowsets());
+
+    return Status::OK();
+}
+
+Status CloudCompactionMixin::execute_compact() {
+    TEST_INJECTION_POINT("Compaction::do_compaction");
+    int64_t permits = get_compaction_permits();
+    Status st = execute_compact_impl(permits);
+    if (!st.ok()) {
+        garbage_collection();
+        return st;
+    }
+    _load_segment_to_cache();
+    return st;
+}
+
+Status CloudCompactionMixin::modify_rowsets() {

Review Comment:
   Consider use pure virtual function



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