*   <li>{@link #suggest()}: Creates a new SuggestRequestBuilder for querying suggestions.</li>
 *   <li>{@link #popularWords()}: Creates a new PopularWordsRequestBuilder for querying popular words.</li>
 *   <li>{@link #refresh()}: Refreshes the suggestion indices.</li>
 *   <li>{@link #shutdown()}: Shuts down the thread pool.</li>
 *   <li>{@link #createIndexIfNothing()}: Creates a new index if no index exists.</li>

   * implementation; otherwise refreshes will be performed during unrelated cache read and write
   * operations.
   *
   * <p>Currently automatic refreshes are performed when the first stale request for an entry
   * occurs. The request triggering refresh will make a synchronous call to {@link
   * CacheLoader#reload}

- **SuggestSettings**: NOT thread-safe for modifications

### Performance
- Use batch operations for indexing (100-500 items)
- Don't call `refresh()` too frequently
- Limit `maxReadingNum` to prevent memory issues
- OpenSearch auto-refreshes every 1 second by default

### Compatibility
- Designed for OpenSearch 2.x+
- All text processing uses UTF-8

	data, err := json.Marshal(tiers)
	if err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}

	w.Header().Set(tierCfgRefreshAtHdr, globalTierConfigMgr.refreshedAt().String())
	writeSuccessResponseJSON(w, data)
}

func (api adminAPIHandlers) EditTierHandler(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	tierConfigVersion = 2
)

// tierConfigPath refers to remote tier config object name
var tierConfigPath = path.Join(minioConfigPrefix, tierConfigFile)

const tierCfgRefreshAtHdr = "X-MinIO-TierCfg-RefreshedAt"

// TierConfigMgr holds the collection of remote tiers configured in this deployment.
type TierConfigMgr struct {
	sync.RWMutex `msg:"-"`
	drivercache  map[string]WarmBackend `msg:"-"`

        }

        suggester.indexer().index(items);
        suggester.refresh();

        assertEquals(3, suggester.getAllWordsNum());

        SuggestDeleteResponse deleteResponse = suggester.indexer().deleteAll();

        assertNotNull(deleteResponse);
        assertFalse(deleteResponse.hasError());

        suggester.refresh();
        assertEquals(0, suggester.getAllWordsNum());
    }

    @Test

        buildLabelTypePatternList(labelTypeList);
        return labelTypeList.size();
    }

    /**
     * Refreshes the label type items and patterns.
     *
     * @param labelTypeList The list of label types.
     */
    public void refresh(final List<LabelType> labelTypeList) {
        buildLabelTypeItems(labelTypeList);
        buildLabelTypePatternList(labelTypeList);
    }

    /**

        runner.refresh();

        assertEquals(3, suggester.getAllWordsNum());

        SuggestWriterResult result = writer.deleteByQuery(runner.client(), suggester.settings(), suggester.getIndex(),
                QueryBuilders.matchQuery(FieldNames.TEXT, "テスト0"));

        assertNotNull(result);
        assertFalse(result.hasFailure());

        runner.refresh();

        runner.refresh();
        suggester = Suggester.builder().build(runner.client(), "SuggesterTest");
        suggester.createIndexIfNothing();
    }

    @Test
    public void test_indexAndSuggest() throws Exception {
        SuggestItem[] items = getItemSet1();
        suggester.indexer().index(items);
        suggester.refresh();

        // Refresh should clear the cache
        auth.refresh();
        Subject afterRefresh = auth.getSubject();
        // After refresh, may succeed or fail depending on JAAS configuration
        // Just verify that refresh doesn't break the authenticator
        assertNotNull(auth, "Authenticator should remain usable after refresh");
    }

    @Test