- 关于 TiDB
- 快速上手
- 部署标准集群
- 数据迁移
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- 系统调优
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- SQL 性能调优
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- 理解 TiDB 执行计划
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- TiUP
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ADD COLUMN
ADD INDEX
ADMIN
ADMIN CANCEL DDL
ADMIN CHECKSUM TABLE
ADMIN CHECK [TABLE|INDEX]
ADMIN SHOW DDL [JOBS|QUERIES]
ALTER DATABASE
ALTER INDEX
ALTER INSTANCE
ALTER TABLE
ALTER USER
ANALYZE TABLE
BACKUP
BEGIN
CHANGE COLUMN
CHANGE DRAINER
CHANGE PUMP
COMMIT
CREATE [GLOBAL|SESSION] BINDING
CREATE DATABASE
CREATE INDEX
CREATE ROLE
CREATE SEQUENCE
CREATE TABLE LIKE
CREATE TABLE
CREATE USER
CREATE VIEW
DEALLOCATE
DELETE
DESC
DESCRIBE
DO
DROP [GLOBAL|SESSION] BINDING
DROP COLUMN
DROP DATABASE
DROP INDEX
DROP ROLE
DROP SEQUENCE
DROP STATS
DROP TABLE
DROP USER
DROP VIEW
EXECUTE
EXPLAIN ANALYZE
EXPLAIN
FLASHBACK TABLE
FLUSH PRIVILEGES
FLUSH STATUS
FLUSH TABLES
GRANT <privileges>
GRANT <role>
INSERT
KILL [TIDB]
LOAD DATA
LOAD STATS
MODIFY COLUMN
PREPARE
RECOVER TABLE
RENAME INDEX
RENAME TABLE
REPLACE
RESTORE
REVOKE <privileges>
REVOKE <role>
ROLLBACK
SELECT
SET DEFAULT ROLE
SET [NAMES|CHARACTER SET]
SET PASSWORD
SET ROLE
SET TRANSACTION
SET [GLOBAL|SESSION] <variable>
SHOW [BACKUPS|RESTORES]
SHOW ANALYZE STATUS
SHOW [GLOBAL|SESSION] BINDINGS
SHOW BUILTINS
SHOW CHARACTER SET
SHOW COLLATION
SHOW [FULL] COLUMNS FROM
SHOW CONFIG
SHOW CREATE SEQUENCE
SHOW CREATE TABLE
SHOW CREATE USER
SHOW DATABASES
SHOW DRAINER STATUS
SHOW ENGINES
SHOW ERRORS
SHOW [FULL] FIELDS FROM
SHOW GRANTS
SHOW INDEX [FROM|IN]
SHOW INDEXES [FROM|IN]
SHOW KEYS [FROM|IN]
SHOW MASTER STATUS
SHOW PLUGINS
SHOW PRIVILEGES
SHOW [FULL] PROCESSSLIST
SHOW PROFILES
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SHOW SCHEMAS
SHOW STATS_HEALTHY
SHOW STATS_HISTOGRAMS
SHOW STATS_META
SHOW STATUS
SHOW TABLE NEXT_ROW_ID
SHOW TABLE REGIONS
SHOW TABLE STATUS
SHOW [FULL] TABLES
SHOW [GLOBAL|SESSION] VARIABLES
SHOW WARNINGS
SHUTDOWN
SPLIT REGION
START TRANSACTION
TABLE
TRACE
TRUNCATE
UPDATE
USE
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mysql
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ANALYZE_STATUS
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SCHEMATA
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SESSION_VARIABLES
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TABLES
TABLE_CONSTRAINTS
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- 版本发布历史
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- v5.0
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- 术语表
验证集群运行状态
在部署完一套 TiDB 集群后,需要检查集群是否正常运行。本文介绍如何通过 TiUP 命令、TiDB Dashboard 和 Grafana 检查集群状态,以及如何登录 TiDB 数据库执行简单的 SQL 操作。
通过 TiUP 检查集群状态
检查集群状态的命令是 tiup cluster display <cluster-name>
,例如:
tiup cluster display tidb-test
预期结果输出:各节点 Status 状态信息为 Up
说明集群状态正常。
通过 TiDB Dashboard 和 Grafana 检查集群状态
本节介绍如何通过 TiDB Dashboard 和 Grafana 检查集群状态。
查看 TiDB Dashboard 检查 TiDB 集群状态
通过
{pd-ip}:{pd-port}/dashboard
登录 TiDB Dashboard,登录用户和口令为 TiDB 数据库root
用户和口令。如果你修改过数据库的root
密码,则以修改后的密码为准,默认密码为空。主页面显示 TiDB 集群中节点信息
查看 Grafana 监控 Overview 页面检查 TiDB 集群状态
通过
{Grafana-ip}:3000
登录 Grafana 监控,默认用户名及密码为admin
/admin
。点击 Overview 监控页面检查 TiDB 端口和负载监控信息。
登录数据库执行简单 DML/DDL 操作和查询 SQL 语句
注意
登录数据库前,你需要安装 MySQL 客户端。
执行以下命令登录数据库:
mysql -u root -h ${tidb_server_host_IP_address} -P 4000
其中,${tidb_server_host_IP_address}
是在初始化集群拓扑文件时为 tidb_servers
配置的 IP 地址之一,例如 10.0.1.7
。
输出下列信息表示登录成功:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.25-TiDB-v5.0.0 TiDB Server (Apache License 2.0) Community Edition, MySQL 5.7 compatible
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
数据库操作
检查 TiDB 版本
select tidb_version()\G
预期结果输出:
*************************** 1. row *************************** tidb_version(): Release Version: v5.0.0 Edition: Community Git Commit Hash: 689a6b6439ae7835947fcaccf329a3fc303986cb Git Branch: HEAD UTC Build Time: 2020-05-28 11:09:45 GoVersion: go1.13.4 Race Enabled: false TiKV Min Version: v3.0.0-60965b006877ca7234adaced7890d7b029ed1306 Check Table Before Drop: false 1 row in set (0.00 sec)
创建 PingCAP database
create database pingcap;
Query OK, 0 rows affected (0.10 sec)
use pingcap;
预期输出
Database changed
创建
tab_tidb
表CREATE TABLE `tab_tidb` ( `id` int(11) NOT NULL AUTO_INCREMENT, `name` varchar(20) NOT NULL DEFAULT '', `age` int(11) NOT NULL DEFAULT 0, `version` varchar(20) NOT NULL DEFAULT '', PRIMARY KEY (`id`), KEY `idx_age` (`age`));
预期输出
Query OK, 0 rows affected (0.11 sec)
插入数据
insert into `tab_tidb` values (1,'TiDB',5,'TiDB-v5.0.0');
预期输出
Query OK, 1 row affected (0.03 sec)
查看
tab_tidb
结果select * from tab_tidb;
预期输出
+----+------+-----+-------------+ | id | name | age | version | +----+------+-----+-------------+ | 1 | TiDB | 5 | TiDB-v5.0.0 | +----+------+-----+-------------+ 1 row in set (0.00 sec)
查看 TiKV store 状态、
store_id
、存储情况以及启动时间select STORE_ID,ADDRESS,STORE_STATE,STORE_STATE_NAME,CAPACITY,AVAILABLE,UPTIME from INFORMATION_SCHEMA.TIKV_STORE_STATUS;
预期输出
+----------+--------------------+-------------+------------------+----------+-----------+--------------------+ | STORE_ID | ADDRESS | STORE_STATE | STORE_STATE_NAME | CAPACITY | AVAILABLE | UPTIME | +----------+--------------------+-------------+------------------+----------+-----------+--------------------+ | 1 | 10.0.1.1:20160 | 0 | Up | 49.98GiB | 46.3GiB | 5h21m52.474864026s | | 4 | 10.0.1.2:20160 | 0 | Up | 49.98GiB | 46.32GiB | 5h21m52.522669177s | | 5 | 10.0.1.3:20160 | 0 | Up | 49.98GiB | 45.44GiB | 5h21m52.713660541s | +----------+--------------------+-------------+------------------+----------+-----------+--------------------+ 3 rows in set (0.00 sec)
退出
exit
预期输出
Bye
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