public static String hotIndexName(String indexName) {
        return indexName.replace(WARM_INDEX_INFIX_WITH_SEPARATOR, SEPARATOR);
    }
@Test
    public void testHotIndexNameOfWarmIndex() {
        assertThat(hotIndexName("gl_warm_1")).isEqualTo("gl_1");
        assertThat(hotIndexName("gl_testwarm_1")).isEqualTo("gl_testwarm_1");
    }