fix: unit tests

src/mito2/src/engine/append_mode_test.rs

@@ -164,7 +164,7 @@ async fn test_append_mode_compaction() {
 +-------+---------+---------------------+";
     // Scans in parallel.
     let scanner = engine.scanner(region_id, ScanRequest::default()).unwrap();
-    assert_eq!(1, scanner.num_files());
+    assert_eq!(2, scanner.num_files());
     assert_eq!(1, scanner.num_memtables());
     let stream = scanner.scan().await.unwrap();
     let batches = RecordBatches::try_collect(stream).await.unwrap();

src/mito2/src/engine/compaction_test.rs

@@ -137,8 +137,13 @@ async fn test_compaction_region() {
     assert_eq!(result.affected_rows, 0);
 
     let scanner = engine.scanner(region_id, ScanRequest::default()).unwrap();
+    // [0..9]
+    //       [10...19]
+    //                [20....29]
+    //          -[15.........29]-
+    //           [15.....24]
     assert_eq!(
-        1,
+        3,
         scanner.num_files(),
         "unexpected files: {:?}",
         scanner.file_ids()
@@ -280,7 +285,7 @@ async fn test_readonly_during_compaction() {
         .unwrap();
     // Flush 2 SSTs for compaction.
     put_and_flush(&engine, region_id, &column_schemas, 0..10).await;
-    put_and_flush(&engine, region_id, &column_schemas, 10..20).await;
+    put_and_flush(&engine, region_id, &column_schemas, 5..20).await;
 
     // Waits until the engine receives compaction finished request.
     listener.wait_handle_finished().await;

src/mito2/src/region/options.rs

@@ -160,7 +160,7 @@ impl TwcsOptions {
 impl Default for TwcsOptions {
     fn default() -> Self {
         Self {
-            max_active_window_runs: 4,
+            max_active_window_runs: 1,
             max_inactive_window_files: 1,
             time_window: None,
         }