// wait for yellow status
        runner.ensureYellow();

        System.setProperty(FesenClient.HTTP_ADDRESS, "localhost:" + runner.node().settings().get("http.port", "9201"));

        super.setUp();
    }

    @Override
    public void tearDown() throws Exception {
        super.tearDown();
        // close runner
        runner.close();
        // delete all files

        // wait for yellow status
        runner.ensureYellow();

        System.setProperty(FesenClient.HTTP_ADDRESS, "localhost:" + runner.node().settings().get("http.port", "9201"));

        super.setUp();
    }

    @Override
    public void tearDown() throws Exception {
        super.tearDown();
        // close runner
        runner.close();
        // delete all files

        // wait for yellow status
        runner.ensureYellow();

        System.setProperty(FesenClient.HTTP_ADDRESS, "localhost:" + runner.node().settings().get("http.port", "9201"));

        super.setUp();

        // logging
        System.setProperty("java.util.logging.SimpleFormatter.format", "%1$tY-%1$tm-%1$td %1$tH:%1$tM:%1$tS %4$s %2$s %5$s%6$s%n");

// Add OpenSearch dependency and configure
container.singleton("opensearchDataService", OpenSearchDataService.class, service -> {
    service.setIndexName("crawler-data");
    service.setHostname("localhost");
    service.setPort(9200);
});
```

## Performance Tuning

### Thread Configuration

```java
// Optimize thread pool settings
crawler.crawlerContext.setNumOfThread(20);           // Number of crawler threads

            count++;
        }
        assertTrue(String.valueOf(count), count < 200);
    }

    @Test
    public void test_ReadMultiThread() throws Exception {
        int threadNum = new Random().nextInt(20) + 1;
        System.out.println("Thread num:" + threadNum);

        String indexName = "test-index";
        Client client = runner.client();
        SuggestSettings settings = suggester.settings();

     * Creates a new instance of FesenClient.
     * Initializes the address and target indices from system properties.
     */
    public FesenClient() {
        address = System.getProperty(HTTP_ADDRESS, "localhost:9200").trim();
        final String targets = System.getProperty(TARGET_INDICES);
        if (StringUtil.isNotBlank(targets)) {
            targetIndices = Arrays.stream(targets.split(",")).map(String::trim).toArray(n -> new String[n]);