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tools: Add TiDB Controller usage #683
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title: TiDB Controller 使用说明 | ||
category: tools | ||
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# TiDB Controller 使用说明 | ||
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TiDB Controller 是 TiDB 的命令行工具,用于获取 TiDB 状态信息,多用于调试。 | ||
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## 源码编译 | ||
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编译环境要求: [Go](https://golang.org/) Version 1.7 以上 | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Please delete the extra whitespace after the colon. Do not add whitespace between English characters and Chinese punctuation. |
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编译步骤:在 [TiDB Controller 项目](https://github.com/pingcap/tidb-ctl)根目录,使用 `make` 命令进行编译,生成 tidb-ctl 。 | ||
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编译文档:帮助文档在 doc 文件夹下,如丢失或需要更新,可通过 `make doc` 命令生成帮助文档。 | ||
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## 使用介绍 | ||
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`tidb-ctl` 的使用由命令(包括子命令)、选项和参数组成。命令即不带`-`或者`--`的字符,选项即带有`-`或者`--`的字符,参数即命令或选项字符后紧跟的传递给命令和选项的字符。 | ||
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如: | ||
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`tidb-ctl schema in mysql -n db` | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. This is inline code style, so there is no need to start it from a new line. Please move it the place after "如:". |
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* schema: 命令 | ||
* in: schema 的子命令 | ||
* mysql: in的参数 | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Add a whitespace after "in". |
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* -n: 选项 | ||
* db: -n 的参数 | ||
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### 获取帮助 | ||
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`tidb-ctl -h/--help` 来获取帮助信息。tidb-ctl 由多层命令组成,tidb-ctl 及其所有子命令都可以通过 `-h/--help` 来获取使用帮助。 | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. " |
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### 连接 | ||
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`tidb-ctl -H/--host { TiDB 服务地址} -P/--port { TiDB 服务端口}` | ||
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如不添加地址和端口将使用默认值,默认的地址是 127.0.0.1 (服务地址只能使用 IP 地址),默认的端口是 10080 。**连接选项是顶级选项,适用于以下所有命令。** | ||
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目前,TiDB Controller 可以获取四类信息,分别通过以下四个命令获得: | ||
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* `tidb-ctl mvcc` - MVCC 信息 | ||
* `tidb-ctl region` - Region 信息 | ||
* `tidb-ctl schema` - Schema 信息 | ||
* `tidb-ctl table` - Table 信息 | ||
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### 使用举例 | ||
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以获取 Schema 信息为例: | ||
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通过 `tidb-ctl schema -h` 可以获取这个子命令的使用帮助。schema 有两个子命令,in 和 tid 。 in 用来通过数据库名获取数据库中所有表的表结构, tid 用来通过全数据库唯一的 table_id 获取表的表结构。 | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Ditto. Delete the following extra whitespaces:
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#### in 命令 | ||
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同样可以通过 `tidb-ctl schema in -h/--help` 来获取子命令 in 的使用帮助。 | ||
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##### 基本用法 | ||
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`tidb-ctl schema in {数据库名}` | ||
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如: `tidb-ctl schema in mysql` 将得到以下结果: | ||
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```text | ||
[ | ||
{ | ||
"id": 13, | ||
"name": { | ||
"O": "columns_priv", | ||
"L": "columns_priv" | ||
}, | ||
... | ||
"update_timestamp": 399494726837600268, | ||
"ShardRowIDBits": 0, | ||
"Partition": null | ||
} | ||
] | ||
``` | ||
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结果将以 json 形式展示,内容较长,这里做了截断。 | ||
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如希望指定表名,可以使用 `tidb-ctl schema in {数据库名} -n {表名}` 进行过滤。 | ||
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如: `tidb-ctl schema in mysql -n db` 将得到 mysql 库中 db 表的表结构,结果如下: | ||
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```text | ||
{ | ||
"id": 9, | ||
"name": { | ||
"O": "db", | ||
"L": "db" | ||
}, | ||
... | ||
"Partition": null | ||
} | ||
``` | ||
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这里同样做了截断。 | ||
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如希望指定服务地址,可以使用 `-H -P` 选项,如: `tidb-ctl -H 127.0.0.1 -P 10080 schema in mysql -n db` 。 | ||
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Please add this file to README.