gavinchou commented on code in PR #59754:
URL: https://github.com/apache/doris/pull/59754#discussion_r2705427979
##########
be/src/cloud/cloud_tablet.cpp:
##########
@@ -1736,5 +1738,177 @@ void CloudTablet::add_warmed_up_rowset(const RowsetId&
rowset_id) {
.start_tp = std::chrono::steady_clock::now()};
}
+void CloudTablet::clear_unused_visible_pending_rowsets() {
+ int64_t cur_max_version = max_version().second;
+ int32_t max_version_count = max_version_config();
+ int64_t current_time = std::chrono::duration_cast<std::chrono::seconds>(
+
std::chrono::system_clock::now().time_since_epoch())
+ .count();
+ {
+ std::unique_lock<std::mutex> wlock(_visible_pending_rs_lock);
+ for (auto it = _visible_pending_rs_map.begin(); it !=
_visible_pending_rs_map.end();) {
+ if (int64_t version = it->first, expiration_time =
it->second.expiration_time;
+ version <= cur_max_version || expiration_time < current_time) {
+ it = _visible_pending_rs_map.erase(it);
+ } else {
+ ++it;
+ }
+ }
+
+ while (!_visible_pending_rs_map.empty() &&
+ _visible_pending_rs_map.size() > max_version_count) {
+ _visible_pending_rs_map.erase(--_visible_pending_rs_map.end());
+ }
+ }
+}
+
+void CloudTablet::try_make_committed_rs_visible(int64_t txn_id, int64_t
visible_version,
+ int64_t
version_update_time_ms) {
+ if (enable_unique_key_merge_on_write()) {
+ try_make_committed_rs_visible_for_mow(txn_id, visible_version,
version_update_time_ms);
+ } else {
+ auto& committed_rs_mgr = _engine.committed_rs_mgr();
+ auto res = committed_rs_mgr.get_committed_rowset(txn_id, tablet_id());
+ if (!res.has_value()) {
+ return;
+ }
+ auto [rowset_meta, expiration_time] = res.value();
+ bool is_empty_rowset = (rowset_meta == nullptr);
+ if (!is_empty_rowset) {
+ rowset_meta->set_cloud_fields_after_visible(visible_version,
version_update_time_ms);
+ }
+ {
+ std::lock_guard<std::mutex> lock(_visible_pending_rs_lock);
+ _visible_pending_rs_map.emplace(
+ visible_version,
+ VisiblePendingRowset {rowset_meta, expiration_time,
is_empty_rowset});
+ }
+
+ apply_visible_pending_rowsets();
+ committed_rs_mgr.remove_committed_rowset(txn_id, tablet_id());
+ }
+}
+
+void CloudTablet::try_make_committed_rs_visible_for_mow(int64_t txn_id,
int64_t visible_version,
+ int64_t
version_update_time_ms) {
+ Defer defer {[&] {
+
_engine.txn_delete_bitmap_cache().remove_unused_tablet_txn_info(txn_id,
tablet_id());
+ }};
+ auto res =
_engine.txn_delete_bitmap_cache().get_rowset_and_delete_bitmap(txn_id,
tablet_id());
+ if (!res.has_value()) {
+ return;
+ }
+ auto [rowset, delete_bitmap] = res.value();
+ bool is_empty_rowset = (rowset == nullptr);
+ {
+ std::unique_lock lock {_sync_meta_lock};
+ std::unique_lock meta_wlock {_meta_lock};
+ if (_max_version + 1 != visible_version) {
+ return;
+ }
+ if (is_empty_rowset) {
+ Versions existing_versions;
+ for (const auto& [_, rs] : tablet_meta()->all_rs_metas()) {
+ existing_versions.emplace_back(rs->version());
+ }
+ if (existing_versions.empty()) {
+ return;
+ }
+ auto max_version = std::ranges::max(existing_versions, {},
&Version::first);
+ auto prev_rowset = get_rowset_by_version(max_version);
+ auto st = _engine.meta_mgr().create_empty_rowset_for_hole(
+ this, visible_version, prev_rowset->rowset_meta(),
&rowset);
+ if (!st.ok()) {
+ return;
+ }
+ } else {
+ for (const auto& [delete_bitmap_key, bitmap_value] :
delete_bitmap->delete_bitmap) {
+ // skip sentinel mark, which is used for delete bitmap
correctness check
+ if (std::get<1>(delete_bitmap_key) !=
DeleteBitmap::INVALID_SEGMENT_ID) {
+ tablet_meta()->delete_bitmap().merge(
+ {std::get<0>(delete_bitmap_key),
std::get<1>(delete_bitmap_key),
+ visible_version},
+ bitmap_value);
+ }
+ }
+ }
+ rowset->rowset_meta()->set_cloud_fields_after_visible(visible_version,
+
version_update_time_ms);
+ add_rowsets({rowset}, false, meta_wlock, true);
+ }
+ LOG(INFO) << "mow added visible pending rowset, txn_id=" << txn_id
+ << ", tablet_id=" << tablet_id() << ", version=" <<
visible_version
+ << ", rowset_id=" << rowset->rowset_id().to_string();
+}
+
+void CloudTablet::apply_visible_pending_rowsets() {
+ Defer defer {[&] { clear_unused_visible_pending_rowsets(); }};
+ {
+ std::unique_lock lock(_sync_meta_lock);
+ std::unique_lock<std::shared_mutex> meta_wlock(_meta_lock);
+ int64_t next_version = _max_version + 1;
+ std::vector<RowsetSharedPtr> to_add;
+ std::lock_guard<std::mutex> pending_lock(_visible_pending_rs_lock);
+ for (auto it = _visible_pending_rs_map.upper_bound(_max_version);
+ it != _visible_pending_rs_map.end(); ++it) {
+ if (int64_t version = it->first; version == next_version) {
Review Comment:
```suggestion
if (!(int64_t version = it->first; version == next_version))
break;
```
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