diff --git a/README.md b/README.md
index 528280ca..391f00a6 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ Bigtop-Manager is a platform for managing Bigtop components. Inspired by Apache
 ## Prerequisites
 
 JDK: Requires JDK 17 or 21  
-Metadata DB: Mariadb or Mysql
+Metadata DB: Mariadb or Mysql(8 or above)
 
 ### API-DOCS
 [swagger-ui](http://localhost:8080/swagger-ui/index.html)
diff --git a/bigtop-manager-server/src/main/resources/ddl/MySQL-DDL-CREATE.sql b/bigtop-manager-server/src/main/resources/ddl/MySQL-DDL-CREATE.sql
index 8acb0776..c7a5f5f5 100644
--- a/bigtop-manager-server/src/main/resources/ddl/MySQL-DDL-CREATE.sql
+++ b/bigtop-manager-server/src/main/resources/ddl/MySQL-DDL-CREATE.sql
@@ -82,11 +82,11 @@ CREATE TABLE `host`
     `hostname`        VARCHAR(255) DEFAULT NULL,
     `ipv4`            VARCHAR(32)  DEFAULT NULL,
     `ipv6`            VARCHAR(32)  DEFAULT NULL,
-    `os_arch`         VARCHAR(32) NOT NULL,
-    `os_name`         VARCHAR(32) NOT NULL,
-    `processor_count` INT         NOT NULL,
-    `physical_memory` BIGINT      NOT NULL COMMENT 'Total Physical Memory(Bytes)',
-    `state`           VARCHAR(32) NOT NULL,
+    `arch`         VARCHAR(32) DEFAULT NULL,
+    `os`         VARCHAR(32) DEFAULT NULL,
+    `processor_count` INT         DEFAULT NULL,
+    `physical_memory` BIGINT      DEFAULT NULL COMMENT 'Total Physical Memory(Bytes)',
+    `state`           VARCHAR(32) DEFAULT NULL,
     `create_time`     DATETIME     DEFAULT NULL,
     `update_time`     DATETIME     DEFAULT NULL,
     PRIMARY KEY (`id`),
@@ -98,9 +98,9 @@ CREATE TABLE `repo` (
     `cluster_id`  BIGINT(20) UNSIGNED NOT NULL,
     `os`          VARCHAR(32)  DEFAULT NULL,
     `arch`        VARCHAR(32)  DEFAULT NULL,
-    `base_url`    VARCHAR(32)  DEFAULT NULL,
+    `base_url`    VARCHAR(64)  DEFAULT NULL,
     `repo_id`     VARCHAR(32)  DEFAULT NULL,
-    `repo_name`   VARCHAR(32)  DEFAULT NULL,
+    `repo_name`   VARCHAR(64)  DEFAULT NULL,
     `create_time` DATETIME     DEFAULT NULL,
     `update_time` DATETIME     DEFAULT NULL,
     PRIMARY KEY (`id`),
@@ -123,7 +123,7 @@ CREATE TABLE `job`
     `id`          BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
     `cluster_id`  BIGINT(20) UNSIGNED DEFAULT NULL,
     `state`       VARCHAR(32) NOT NULL,
-    `context`     VARCHAR(32) NOT NULL,
+    `context`     TEXT        NOT NULL,
     `create_time` DATETIME DEFAULT NULL,
     `update_time` DATETIME DEFAULT NULL,
     PRIMARY KEY (`id`),