Add more test

Author: thecoop

server/src/internalClusterTest/java/org/elasticsearch/index/store/DirectIOIT.java

@@ -47,8 +47,6 @@ public class DirectIOIT extends ESIntegTestCase {
 
     @BeforeClass
     public static void checkSupported() {
-        assumeTrue("Direct IO is not enabled", ES818BinaryQuantizedVectorsFormat.USE_DIRECT_IO);
-
         Path path = createTempDir("directIOProbe");
         try (Directory dir = open(path); IndexOutput out = dir.createOutput("out", IOContext.DEFAULT)) {
             out.writeString("test");
@@ -73,7 +71,7 @@ protected Collection<Class<? extends Plugin>> nodePlugins() {
     }
 
     private void indexVectors() {
-        String type = randomFrom("bbq_flat", "bbq_hnsw");
+        String type = randomFrom(/*"bbq_flat", */"bbq_hnsw");
         assertAcked(
             prepareCreate("foo-vectors").setSettings(Settings.builder().put(InternalSettingsPlugin.USE_COMPOUND_FILE.getKey(), false))
                 .setMapping("""
@@ -86,7 +84,8 @@ private void indexVectors() {
                           "index": true,
                           "similarity": "l2_norm",
                           "index_options": {
-                            "type": "%type%"
+                            "type": "%type%",
+                            "disable_offheap_cache_rescoring": true
                           }
                         }
                       }