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TDengine
未验证 提交 7f83b412 编写于 作者: W wade zhang 提交者： GitHub
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Merge pull request #12964 from taosdata/docs/dingbo/2.4-webp 

docs: use webp format images
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docs-cn/02-intro.md
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......@@ -62,7 +62,7 @@ TDengine的主要功能如下：
<figure>
![TDengine技术生态图](eco_system.png)
![TDengine技术生态图](eco_system.webp)
</figure>
<center>图 1. TDengine技术生态图</center>
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docs-cn/12-taos-sql/08-interval.md
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......@@ -11,7 +11,7 @@ TDengine 支持按时间段窗口切分方式进行聚合结果查询，比如
INTERVAL 子句用于产生相等时间周期的窗口，SLIDING 用以指定窗口向前滑动的时间。每次执行的查询是一个时间窗口，时间窗口随着时间流动向前滑动。在定义连续查询的时候需要指定时间窗口（time window ）大小和每次前向增量时间（forward sliding times）。如图，[t0s, t0e] ，[t1s , t1e]， [t2s, t2e] 是分别是执行三次连续查询的时间窗口范围，窗口的前向滑动的时间范围 sliding time 标识 。查询过滤、聚合等操作按照每个时间窗口为独立的单位执行。当 SLIDING 与 INTERVAL 相等的时候，滑动窗口即为翻转窗口。
![时间窗口示意图](/img/sql/timewindow-1.png)
![时间窗口示意图](./timewindow-1.webp)
INTERVAL 和 SLIDING 子句需要配合聚合和选择函数来使用。以下 SQL 语句非法：
......@@ -33,7 +33,7 @@ _ 从 2.1.5.0 版本开始，INTERVAL 语句允许的最短时间间隔调整为
使用整数（布尔值）或字符串来标识产生记录时候设备的状态量。产生的记录如果具有相同的状态量数值则归属于同一个状态窗口，数值改变后该窗口关闭。如下图所示，根据状态量确定的状态窗口分别是[2019-04-28 14:22:07，2019-04-28 14:22:10]和[2019-04-28 14:22:11，2019-04-28 14:22:12]两个。（状态窗口暂不支持对超级表使用）
![时间窗口示意图](/img/sql/timewindow-3.png)
![时间窗口示意图](./timewindow-3.webp)
使用 STATE_WINDOW 来确定状态窗口划分的列。例如：
......@@ -45,7 +45,7 @@ SELECT COUNT(*), FIRST(ts), status FROM temp_tb_1 STATE_WINDOW(status);
会话窗口根据记录的时间戳主键的值来确定是否属于同一个会话。如下图所示，如果设置时间戳的连续的间隔小于等于 12 秒，则以下 6 条记录构成 2 个会话窗口，分别是：[2019-04-28 14:22:10，2019-04-28 14:22:30]和[2019-04-28 14:23:10，2019-04-28 14:23:30]。因为 2019-04-28 14:22:30 与 2019-04-28 14:23:10 之间的时间间隔是 40 秒，超过了连续时间间隔（12 秒）。
![时间窗口示意图](/img/sql/timewindow-2.png)
![时间窗口示意图](./timewindow-2.webp)
在 tol_value 时间间隔范围内的结果都认为归属于同一个窗口，如果连续的两条记录的时间超过 tol_val，则自动开启下一个窗口。（会话窗口暂不支持对超级表使用）
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docs-cn/14-reference/03-connector/03-connector.mdx
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......@@ -4,7 +4,7 @@ title: 连接器
TDengine 提供了丰富的应用程序开发接口，为了便于用户快速开发自己的应用，TDengine 支持了多种编程语言的连接器，其中官方连接器包括支持 C/C++、Java、Python、Go、Node.js、C# 和 Rust 的连接器。这些连接器支持使用原生接口（taosc）和 REST 接口（部分语言暂不支持）连接 TDengine 集群。社区开发者也贡献了多个非官方连接器，例如 ADO.NET 连接器、Lua 连接器和 PHP 连接器。
![image-connector](/img/connector.png)
![image-connector](./connector.webp)
## 支持的平台
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docs-cn/14-reference/03-connector/java.mdx
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......@@ -11,7 +11,7 @@ import TabItem from '@theme/TabItem';
`taos-jdbcdriver` 是 TDengine 的官方 Java 语言连接器，Java 开发人员可以通过它开发存取 TDengine 数据库的应用软件。`taos-jdbcdriver` 实现了 JDBC driver 标准的接口，并提供两种形式的连接器。一种是通过 TDengine 客户端驱动程序（taosc）原生连接 TDengine 实例，支持数据写入、查询、订阅、schemaless 接口和参数绑定接口等功能，一种是通过 taosAdapter 提供的 REST 接口连接 TDengine 实例（2.4.0.0 及更高版本）。REST 连接实现的功能集合和原生连接有少量不同。
![tdengine-connector](tdengine-jdbc-connector.png)
![tdengine-connector](tdengine-jdbc-connector.webp)
上图显示了两种 Java 应用使用连接器访问 TDengine 的两种方式：
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docs-cn/14-reference/04-taosadapter.md
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......@@ -24,7 +24,7 @@ taosAdapter 提供以下功能：
## taosAdapter 架构图
![taosAdapter Architecture](taosAdapter-architecture.png)
![taosAdapter Architecture](taosAdapter-architecture.webp)
## taosAdapter 部署方法
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docs-cn/14-reference/07-tdinsight/index.md
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......@@ -233,33 +233,33 @@ sudo systemctl enable grafana-server
指向 **Configurations** -> **Data Sources** 菜单，然后点击 **Add data source** 按钮。
![添加数据源按钮](./assets/howto-add-datasource-button.png)
![添加数据源按钮](./assets/howto-add-datasource-button.webp)
搜索并选择**TDengine**。
![添加数据源](./assets/howto-add-datasource-tdengine.png)
![添加数据源](./assets/howto-add-datasource-tdengine.webp)
配置 TDengine 数据源。
![数据源配置](./assets/howto-add-datasource.png)
![数据源配置](./assets/howto-add-datasource.webp)
保存并测试，正常情况下会报告 'TDengine Data source is working'。
![数据源测试](./assets/howto-add-datasource-test.png)
![数据源测试](./assets/howto-add-datasource-test.webp)
### 导入仪表盘
指向 **+** / **Create** - **import**（或 `/dashboard/import` url）。
![导入仪表盘和配置](./assets/import_dashboard.png)
![导入仪表盘和配置](./assets/import_dashboard.webp)
在 **Import via grafana.com** 位置键入仪表盘 ID `15167` 并 **Load**。
![通过 grafana.com 导入](./assets/import-dashboard-15167.png)
![通过 grafana.com 导入](./assets/import-dashboard-15167.webp)
导入完成后，TDinsight 的完整页面视图如下所示。
![显示](./assets/TDinsight-full.png)
![显示](./assets/TDinsight-full.webp)
## TDinsight 仪表盘详细信息
......@@ -269,7 +269,7 @@ TDinsight 仪表盘旨在提供 TDengine 相关资源使用情况[dnodes, mnodes
### 集群状态
![tdinsight-mnodes-overview](./assets/TDinsight-1-cluster-status.png)
![tdinsight-mnodes-overview](./assets/TDinsight-1-cluster-status.webp)
这部分包括集群当前信息和状态，告警信息也在此处（从左到右，从上到下）。
......@@ -289,7 +289,7 @@ TDinsight 仪表盘旨在提供 TDengine 相关资源使用情况[dnodes, mnodes
### DNodes 状态
![tdinsight-mnodes-overview](./assets/TDinsight-2-dnodes.png)
![tdinsight-mnodes-overview](./assets/TDinsight-2-dnodes.webp)
- **DNodes Status**：`show dnodes` 的简单表格视图。
- **DNodes Lifetime**：从创建 dnode 开始经过的时间。
......@@ -298,14 +298,14 @@ TDinsight 仪表盘旨在提供 TDengine 相关资源使用情况[dnodes, mnodes
### MNode 概述
![tdinsight-mnodes-overview](./assets/TDinsight-3-mnodes.png)
![tdinsight-mnodes-overview](./assets/TDinsight-3-mnodes.webp)
1. **MNodes Status**：`show mnodes` 的简单表格视图。
2. **MNodes Number**：类似于`DNodes Number`，MNodes 数量变化。
### 请求
![tdinsight-requests](./assets/TDinsight-4-requests.png)
![tdinsight-requests](./assets/TDinsight-4-requests.webp)
1. **Requests Rate(Inserts per Second)**：平均每秒插入次数。
2. **Requests (Selects)**：查询请求数及变化率（count of second）。
......@@ -313,7 +313,7 @@ TDinsight 仪表盘旨在提供 TDengine 相关资源使用情况[dnodes, mnodes
### 数据库
![tdinsight-database](./assets/TDinsight-5-database.png)
![tdinsight-database](./assets/TDinsight-5-database.webp)
数据库使用情况，对变量 `$database` 的每个值即每个数据库进行重复多行展示。
......@@ -325,7 +325,7 @@ TDinsight 仪表盘旨在提供 TDengine 相关资源使用情况[dnodes, mnodes
### DNode 资源使用情况
![dnode-usage](./assets/TDinsight-6-dnode-usage.png)
![dnode-usage](./assets/TDinsight-6-dnode-usage.webp)
数据节点资源使用情况展示，对变量 `$fqdn` 即每个数据节点进行重复多行展示。包括：
......@@ -346,13 +346,13 @@ TDinsight 仪表盘旨在提供 TDengine 相关资源使用情况[dnodes, mnodes
### 登录历史
![登录历史](./assets/TDinsight-7-login-history.png)
![登录历史](./assets/TDinsight-7-login-history.webp)
目前只报告每分钟登录次数。
### 监控 taosAdapter
![taosadapter](./assets/TDinsight-8-taosadapter.png)
![taosadapter](./assets/TDinsight-8-taosadapter.webp)
支持监控 taosAdapter 请求统计和状态详情。包括：
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docs-cn/20-third-party/01-grafana.mdx
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......@@ -64,15 +64,15 @@ GF_PLUGINS_ALLOW_LOADING_UNSIGNED_PLUGINS=tdengine-datasource
用户可以直接通过 http://localhost:3000 的网址，登录 Grafana 服务器（用户名/密码：admin/admin），通过左侧 `Configuration -> Data Sources` 可以添加数据源，如下图所示：
![img](/img/connections/add_datasource1.jpg)
![img](./add_datasource1.webp)
点击 `Add data source` 可进入新增数据源页面，在查询框中输入 TDengine 可选择添加，如下图所示：
![img](/img/connections/add_datasource2.jpg)
![img](./add_datasource2.webp)
进入数据源配置页面，按照默认提示修改相应配置即可：
![img](/img/connections/add_datasource3.jpg)
![img](./add_datasource3.webp)
- Host： TDengine 集群中提供 REST 服务 （在 2.4 之前由 taosd 提供， 从 2.4 开始由 taosAdapter 提供）的组件所在服务器的 IP 地址与 TDengine REST 服务的端口号(6041)，默认 http://localhost:6041。
- User：TDengine 用户名。
......@@ -80,13 +80,13 @@ GF_PLUGINS_ALLOW_LOADING_UNSIGNED_PLUGINS=tdengine-datasource
点击 `Save & Test` 进行测试，成功会有如下提示：
![img](/img/connections/add_datasource4.jpg)
![img](./add_datasource4.webp)
### 创建 Dashboard
回到主界面创建 Dashboard，点击 Add Query 进入面板查询页面：
![img](/img/connections/create_dashboard1.jpg)
![img](./create_dashboard1.webp)
如上图所示，在 Query 中选中 `TDengine` 数据源，在下方查询框可输入相应 SQL 进行查询，具体说明如下：
......@@ -96,7 +96,7 @@ GF_PLUGINS_ALLOW_LOADING_UNSIGNED_PLUGINS=tdengine-datasource
按照默认提示查询当前 TDengine 部署所在服务器指定间隔系统内存平均使用量如下：
![img](/img/connections/create_dashboard2.jpg)
![img](./create_dashboard2.webp)
> 关于如何使用 Grafana 创建相应的监测界面以及更多有关使用 Grafana 的信息，请参考 Grafana 官方的[文档](https://grafana.com/docs/)。
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docs-cn/20-third-party/09-emq-broker.md
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......@@ -45,25 +45,25 @@ MQTT 是流行的物联网数据传输协议，[EMQX](https://github.com/emqx/em
使用浏览器打开网址 http://IP:18083 并登录 EMQX Dashboard。初次安装用户名为 `admin` 密码为：`public`
![img](./emqx/login-dashboard.png)
![img](./emqx/login-dashboard.webp)
### 创建规则（Rule）
选择左侧“规则引擎（Rule Engine）”中的“规则（Rule）”并点击“创建（Create）”按钮：
![img](./emqx/rule-engine.png)
![img](./emqx/rule-engine.webp)
### 编辑 SQL 字段
![img](./emqx/create-rule.png)
![img](./emqx/create-rule.webp)
### 新增“动作（action handler）”
![img](./emqx/add-action-handler.png)
![img](./emqx/add-action-handler.webp)
### 新增“资源（Resource）”
![img](./emqx/create-resource.png)
![img](./emqx/create-resource.webp)
选择“发送数据到 Web 服务“并点击“新建资源”按钮：
......@@ -71,13 +71,13 @@ MQTT 是流行的物联网数据传输协议，[EMQX](https://github.com/emqx/em
选择“发送数据到 Web 服务“并填写 请求 URL 为 运行 taosAdapter 的服务器地址和端口（默认为 6041）。其他属性请保持默认值。
![img](./emqx/edit-resource.png)
![img](./emqx/edit-resource.webp)
### 编辑“动作（action）”
编辑资源配置，增加 Authorization 认证的键/值配对项，相关文档请参考[ TDengine REST API 文档](https://docs.taosdata.com/reference/rest-api/)。在消息体中输入规则引擎替换模板。
![img](./emqx/edit-action.png)
![img](./emqx/edit-action.webp)
## 编写模拟测试程序
......@@ -164,7 +164,7 @@ MQTT 是流行的物联网数据传输协议，[EMQX](https://github.com/emqx/em
注意：代码中 CLIENT_NUM 在开始测试中可以先设置一个较小的值，避免硬件性能不能完全处理较大并发客户端数量。
![img](./emqx/client-num.png)
![img](./emqx/client-num.webp)
## 执行测试模拟发送 MQTT 数据
......@@ -173,19 +173,19 @@ npm install mqtt mockjs --save --registry=https://registry.npm.taobao.org
node mock.js
```
![img](./emqx/run-mock.png)
![img](./emqx/run-mock.webp)
## 验证 EMQX 接收到数据
在 EMQX Dashboard 规则引擎界面进行刷新，可以看到有多少条记录被正确接收到：
![img](./emqx/check-rule-matched.png)
![img](./emqx/check-rule-matched.webp)
## 验证数据写入到 TDengine
使用 TDengine CLI 程序登录并查询相应数据库和表，验证数据是否被正确写入到 TDengine 中：
![img](./emqx/check-result-in-taos.png)
![img](./emqx/check-result-in-taos.webp)
TDengine 详细使用方法请参考 [TDengine 官方文档](https://docs.taosdata.com/)。
EMQX 详细使用方法请参考 [EMQX 官方文档](https://www.emqx.io/docs/zh/v4.4/rule/rule-engine.html)。
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docs-cn/20-third-party/11-kafka.md
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......@@ -9,11 +9,11 @@ TDengine Kafka Connector 包含两个插件: TDengine Source Connector 和 TDeng
Kafka Connect 是 Apache Kafka 的一个组件，用于使其它系统，比如数据库、云服务、文件系统等能方便地连接到 Kafka。数据既可以通过 Kafka Connect 从其它系统流向 Kafka, 也可以通过 Kafka Connect 从 Kafka 流向其它系统。从其它系统读数据的插件称为 Source Connector, 写数据到其它系统的插件称为 Sink Connector。Source Connector 和 Sink Connector 都不会直接连接 Kafka Broker，Source Connector 把数据转交给 Kafka Connect。Sink Connector 从 Kafka Connect 接收数据。
![](kafka/Kafka_Connect.png)
![](kafka/Kafka_Connect.webp)
TDengine Source Connector 用于把数据实时地从 TDengine 读出来发送给 Kafka Connect。TDengine Sink Connector 用于 从 Kafka Connect 接收数据并写入 TDengine。
![](kafka/streaming-integration-with-kafka-connect.png)
![](kafka/streaming-integration-with-kafka-connect.webp)
## 什么是 Confluent？
......@@ -26,7 +26,7 @@ Confluent 在 Kafka 的基础上增加很多扩展功能。包括：
5. 管理和监控 Kafka 的 GUI —— Confluent 控制中心
这些扩展功能有的包含在社区版本的 Confluent 中，有的只有企业版能用。
![](kafka/confluentPlatform.png)
![](kafka/confluentPlatform.webp)
Confluent 企业版提供了 `confluent` 命令行工具管理各个组件。
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docs-cn/21-tdinternal/01-arch.md
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......@@ -11,7 +11,7 @@ TDengine 的设计是基于单个硬件、软件系统不可靠，基于任何
TDengine 分布式架构的逻辑结构图如下：
![TDengine架构示意图](/img/architecture/structure.png)
![TDengine架构示意图](./structure.webp)
<center> 图 1 TDengine架构示意图 </center>
......@@ -63,7 +63,7 @@ TDengine 分布式架构的逻辑结构图如下：
为解释 vnode、mnode、taosc 和应用之间的关系以及各自扮演的角色，下面对写入数据这个典型操作的流程进行剖析。
![TDengine典型的操作流程](/img/architecture/message.png)
![TDengine典型的操作流程](./message.webp)
<center> 图 2 TDengine 典型的操作流程 </center>
......@@ -135,7 +135,7 @@ TDengine 除 vnode 分片之外，还对时序数据按照时间段进行分区
Master Vnode 遵循下面的写入流程：
![TDengine Master写入流程](/img/architecture/write_master.png)
![TDengine Master写入流程](./write_master.webp)
<center> 图 3 TDengine Master 写入流程 </center>
......@@ -150,7 +150,7 @@ Master Vnode 遵循下面的写入流程：
对于 slave vnode，写入流程是：
![TDengine Slave 写入流程](/img/architecture/write_slave.png)
![TDengine Slave 写入流程](./write_slave.webp)
<center> 图 4 TDengine Slave 写入流程 </center>
......@@ -284,7 +284,7 @@ SELECT COUNT(*) FROM d1001 WHERE ts >= '2017-7-14 00:00:00' AND ts < '2017-7-14
TDengine 对每个数据采集点单独建表，但在实际应用中经常需要对不同的采集点数据进行聚合。为高效的进行聚合操作，TDengine 引入超级表（STable）的概念。超级表用来代表一特定类型的数据采集点，它是包含多张表的表集合，集合里每张表的模式（schema）完全一致，但每张表都带有自己的静态标签，标签可以有多个，可以随时增加、删除和修改。应用可通过指定标签的过滤条件，对一个 STable 下的全部或部分表进行聚合或统计操作，这样大大简化应用的开发。其具体流程如下图所示：
![多表聚合查询原理图](/img/architecture/multi_tables.png)
![多表聚合查询原理图](./multi_tables.webp)
<center> 图 5 多表聚合查询原理图 </center>
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docs-cn/21-tdinternal/02-replica.md
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......@@ -93,7 +93,7 @@ TDengine采取的是Master-Slave模式进行同步，与流行的RAFT一致性
具体的流程图如下：
![replica-master.png](/img/architecture/replica-master.png)
![replica-master.webp](./replica-master.webp)
选择Master的具体规则如下：
......@@ -108,7 +108,7 @@ TDengine采取的是Master-Slave模式进行同步，与流行的RAFT一致性
如果vnode A是master, vnode B是slave, vnode A能接受客户端的写请求，而vnode B不能。当vnode A收到写的请求后，遵循下面的流程：
![replica-forward.png](/img/architecture/replica-forward.png)
![replica-forward.webp](./replica-forward.webp)
1. 应用对写请求做基本的合法性检查，通过，则给该请求包打上一个版本号(version, 单调递增）
2. 应用将打上版本号的写请求封装一个WAL Head, 写入WAL(Write Ahead Log)
......@@ -143,7 +143,7 @@ TDengine采取的是Master-Slave模式进行同步，与流行的RAFT一致性
整个数据恢复流程分为两大步骤，第一步，先恢复archived data(file), 然后恢复wal。具体流程如下：
![replica-restore.png](/img/architecture/replica-restore.png)
![replica-restore.webp](./replica-restore.webp)
1. 通过已经建立的TCP连接，发送sync req给master节点
2. master收到sync req后，以client的身份，向vnode B主动建立一新的专用于同步的TCP连接（syncFd)
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......@@ -9,7 +9,7 @@ title: taosd的设计
taosd 包含 rpc，dnode，vnode，tsdb，query，cq，sync，wal，mnode，http，monitor 等模块，具体如下图：
![modules.png](/img/architecture/modules.png)
![modules.webp](./modules.webp)
taosd 的启动入口是 dnode 模块，dnode 然后启动其他模块，包括可选配置的 http，monitor 模块。taosc 或 dnode 之间交互的消息都是通过 rpc 模块进行，dnode 模块根据接收到的消息类型，将消息分发到 vnode 或 mnode 的消息队列，或由 dnode 模块自己消费。dnode 的工作线程（worker）消费消息队列里的消息，交给 mnode 或 vnode 进行处理。下面对各个模块做简要说明。
......@@ -44,13 +44,13 @@ RPC 模块还提供数据压缩功能，如果数据包的字节数超过系统
taosd 的消息消费由 dnode 通过读写线程池进行控制，是系统的中枢。该模块内的结构体图如下：
![dnode.png](/img/architecture/dnode.png)
![dnode.webp](./dnode.webp)
## VNODE 模块
vnode 是一独立的数据存储查询逻辑单元，但因为一个 vnode 只能容许一个 DB ，因此 vnode 内部没有 account，DB，user 等概念。为实现更好的模块化、封装以及未来的扩展，它有很多子模块，包括负责存储的 TSDB，负责查询的 query，负责数据复制的 sync，负责数据库日志的的 WAL，负责连续查询的 cq（continuous query），负责事件触发的流计算的 event 等模块，这些子模块只与 vnode 模块发生关系，与其他模块没有任何调用关系。模块图如下：
![vnode.png](/img/architecture/vnode.png)
![vnode.webp](./vnode.webp)
vnode 模块向下，与 dnodeVRead，dnodeVWrite 发生互动，向上，与子模块发生互动。它主要的功能有：
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......@@ -16,7 +16,7 @@ IT 运维监测数据通常都是对时间特性比较敏感的数据，例如
本文介绍不需要写一行代码，通过简单修改几行配置文件，就可以快速搭建一个基于 TDengine + Telegraf + Grafana 的 IT 运维系统。架构如下图：
![IT-DevOps-Solutions-Telegraf.png](/img/IT-DevOps-Solutions-Telegraf.png)
![IT-DevOps-Solutions-Telegraf.webp](./IT-DevOps-Solutions-Telegraf.webp)
## 安装步骤
......@@ -75,7 +75,7 @@ sudo systemctl start telegraf
点击左侧齿轮图标并选择 `Plugins`，应该可以找到 TDengine data source 插件图标。
点击左侧加号图标并选择 `Import`，从 `https://github.com/taosdata/grafanaplugin/blob/master/examples/telegraf/grafana/dashboards/telegraf-dashboard-v0.1.0.json` 下载 dashboard JSON 文件后导入。之后可以看到如下界面的仪表盘：
![IT-DevOps-Solutions-telegraf-dashboard.png](/img/IT-DevOps-Solutions-telegraf-dashboard.png)
![IT-DevOps-Solutions-telegraf-dashboard.webp]./IT-DevOps-Solutions-telegraf-dashboard.webp)
## 总结
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docs-cn/25-application/02-collectd.md
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......@@ -16,7 +16,7 @@ IT 运维监测数据通常都是对时间特性比较敏感的数据，例如
本文介绍不需要写一行代码，通过简单修改几行配置文件，就可以快速搭建一个基于 TDengine + collectd / statsD + Grafana 的 IT 运维系统。架构如下图：
![IT-DevOps-Solutions-Collectd-StatsD.png](/img/IT-DevOps-Solutions-Collectd-StatsD.png)
![IT-DevOps-Solutions-Collectd-StatsD.webp](./IT-DevOps-Solutions-Collectd-StatsD.webp)
## 安装步骤
......@@ -81,12 +81,12 @@ repeater 部分添加 { host:'<TDengine server/cluster host>', port: <port for S
从 https://github.com/taosdata/grafanaplugin/blob/master/examples/collectd/grafana/dashboards/collect-metrics-with-tdengine-v0.1.0.json 下载 dashboard json 文件，点击左侧加号图标并选择 `Import`，按照界面提示选择 JSON 文件导入。之后可以看到如下界面的仪表盘：
![IT-DevOps-Solutions-collectd-dashboard.png](/img/IT-DevOps-Solutions-collectd-dashboard.png)
![IT-DevOps-Solutions-collectd-dashboard.webp](./IT-DevOps-Solutions-collectd-dashboard.webp)
#### 导入 StatsD 仪表盘
从 `https://github.com/taosdata/grafanaplugin/blob/master/examples/statsd/dashboards/statsd-with-tdengine-v0.1.0.json` 下载 dashboard json 文件，点击左侧加号图标并选择 `Import`，按照界面提示导入 JSON 文件。之后可以看到如下界面的仪表盘：
![IT-DevOps-Solutions-statsd-dashboard.png](/img/IT-DevOps-Solutions-statsd-dashboard.png)
![IT-DevOps-Solutions-statsd-dashboard.webp](./IT-DevOps-Solutions-statsd-dashboard.webp)
## 总结
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docs-cn/25-application/03-immigrate.md
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......@@ -27,7 +27,7 @@ title: OpenTSDB 应用迁移到 TDengine 的最佳实践
一个典型的 DevOps 应用场景的系统整体的架构如下图（图 1） 所示。
**图 1. DevOps 场景中典型架构**
![IT-DevOps-Solutions-Immigrate-OpenTSDB-Arch](/img/IT-DevOps-Solutions-Immigrate-OpenTSDB-Arch.jpg "图1. DevOps 场景中典型架构")
![IT-DevOps-Solutions-Immigrate-OpenTSDB-Arch](./IT-DevOps-Solutions-Immigrate-OpenTSDB-Arch.webp "图1. DevOps 场景中典型架构")
在该应用场景中，包含了部署在应用环境中负责收集机器度量（Metrics）、网络度量（Metrics）以及应用度量（Metrics）的 Agent 工具、汇聚 Agent 收集信息的数据收集器，数据持久化存储和管理的系统以及监控数据可视化工具（例如：Grafana 等）。
......@@ -70,7 +70,7 @@ LoadPlugin write_tsdb
TDengine 提供了默认的两套 Dashboard 模板，用户只需要将 Grafana 目录下的模板导入到 Grafana 中即可激活使用。
**图 2. 导入 Grafana 模板**
![](/img/IT-DevOps-Solutions-Immigrate-OpenTSDB-Dashboard.jpg "图2. 导入 Grafana 模板")
![](./IT-DevOps-Solutions-Immigrate-OpenTSDB-Dashboard.webp "图2. 导入 Grafana 模板")
操作完以上步骤后，就完成了将 OpenTSDB 替换成为 TDengine 的迁移工作。可以看到整个流程非常简单，不需要写代码，只需要对某些配置文件进行调整即可完成全部的迁移工作。
......@@ -83,7 +83,7 @@ TDengine 提供了默认的两套 Dashboard 模板，用户只需要将 Grafana
如果你的应用特别复杂，或者应用领域并不是 DevOps 场景，你可以继续阅读后续的章节，更加全面深入地了解将 OpenTSDB 的应用迁移到 TDengine 的高级话题。
**图 3. 迁移完成后的系统架构**
![IT-DevOps-Solutions-Immigrate-TDengine-Arch](/img/IT-DevOps-Solutions-Immigrate-TDengine-Arch.jpg "图 3. 迁移完成后的系统架构")
![IT-DevOps-Solutions-Immigrate-TDengine-Arch](./IT-DevOps-Solutions-Immigrate-TDengine-Arch.webp "图 3. 迁移完成后的系统架构")
## 其他场景的迁移评估与策略
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......@@ -54,7 +54,7 @@ With TDengine, the total cost of ownership of your time-series data platform can
## Technical Ecosystem
This is how TDengine would be situated, in a typical time-series data processing platform:
![TDengine Technical Ecosystem ](eco_system.png)
![TDengine Technical Ecosystem ](eco_system.webp)
<center>Figure 1. TDengine Technical Ecosystem</center>
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docs-en/12-taos-sql/08-interval.md
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......@@ -10,7 +10,7 @@ Window related clauses are used to divide the data set to be queried into subset
`INTERVAL` clause is used to generate time windows of same time interval, `SLIDING` is used to specify the time step for which the time window moves forward. The query is performed on one time window each time, and the time window moves forward with time. When defining continuous query both the size of time window and the step of forward sliding time need to be specified. As shown in the figure blow, [t0s, t0e] ，[t1s , t1e]， [t2s, t2e] are respectively the time range of three time windows on which continuous queries are executed. The time step for which time window moves forward is marked by `sliding time`. Query, filter and aggregate operations are executed on each time window respectively. When the time step specified by `SLIDING` is same as the time interval specified by `INTERVAL`, the sliding time window is actually a flip time window.
![Time Window](/img/sql/timewindow-1.png)
![Time Window](./timewindow-1.webp)
`INTERVAL` and `SLIDING` should be used with aggregate functions and selection functions. Below SQL statement is illegal because no aggregate or selection function is used with `INTERVAL`.
......@@ -30,7 +30,7 @@ When the time length specified by `SLIDING` is same as that specified by `INTERV
In case of using integer, bool, or string to represent the device status at a moment, the continuous rows with same status belong to same status window. Once the status changes, the status window closes. As shown in the following figure，there are two status windows according to status, [2019-04-28 14:22:07，2019-04-28 14:22:10] and [2019-04-28 14:22:11，2019-04-28 14:22:12]. Status window is not applicable to STable for now.
![Status Window](/img/sql/timewindow-3.png)
![Status Window](./timewindow-3.webp)
`STATE_WINDOW` is used to specify the column based on which to define status window, for example：
......@@ -46,7 +46,7 @@ SELECT COUNT(*), FIRST(ts) FROM temp_tb_1 SESSION(ts, tol_val);
The primary key, i.e. timestamp, is used to determine which session window the row belongs to. If the time interval between two adjacent rows is within the time range specified by `tol_val`, they belong to same session window; otherwise they belong to two different time windows. As shown in the figure below, if the limit of time interval for session window is specified as 12 seconds, then the 6 rows in the figure constitutes 2 time windows, [2019-04-28 14:22:10，2019-04-28 14:22:30] and [2019-04-28 14:23:10，2019-04-28 14:23:30], because the time difference between 2019-04-28 14:22:30 and 2019-04-28 14:23:10 is 40 seconds, which exceeds the time interval limit of 12 seconds.
![Session Window](/img/sql/timewindow-2.png)
![Session Window](./timewindow-2.webp)
If the time interval between two continuous rows are within the time interval specified by `tol_value` they belong to the same session window; otherwise a new session window is started automatically. Session window is not supported on STable for now.
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......@@ -4,7 +4,7 @@ title: Connector
TDengine provides a rich set of APIs (application development interface). To facilitate users to develop their applications quickly, TDengine supports connectors for multiple programming languages, including official connectors for C/C++, Java, Python, Go, Node.js, C#, and Rust. These connectors support connecting to TDengine clusters using both native interfaces (taosc) and REST interfaces (not supported in a few languages yet). Community developers have also contributed several unofficial connectors, such as the ADO.NET connector, the Lua connector, and the PHP connector.
![image-connector](/img/connector.png)
![image-connector](./connector.webp)
## Supported platforms
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......@@ -11,7 +11,7 @@ import TabItem from '@theme/TabItem';
'taos-jdbcdriver' is TDengine's official Java language connector, which allows Java developers to develop applications that access the TDengine database. 'taos-jdbcdriver' implements the interface of the JDBC driver standard and provides two forms of connectors. One is to connect to a TDengine instance natively through the TDengine client driver (taosc), which supports functions including data writing, querying, subscription, schemaless writing, and bind interface. And the other is to connect to a TDengine instance through the REST interface provided by taosAdapter (2.4.0.0 and later). REST connections implement has a slight differences to compare the set of features implemented and native connections.
![tdengine-connector](tdengine-jdbc-connector.png)
![tdengine-connector](tdengine-jdbc-connector.webp)
The preceding diagram shows two ways for a Java app to access TDengine via connector:
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......@@ -24,7 +24,7 @@ taosAdapter provides the following features.
## taosAdapter architecture diagram
![taosAdapter Architecture](taosAdapter-architecture.png)
![taosAdapter Architecture](taosAdapter-architecture.webp)
## taosAdapter Deployment Method
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docs-en/14-reference/07-tdinsight/index.md
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......@@ -233,33 +233,33 @@ The default username/password is `admin`. Grafana will require a password change
Point to the **Configurations** -> **Data Sources** menu, and click the **Add data source** button.
![Add data source button](./assets/howto-add-datasource-button.png)
![Add data source button](./assets/howto-add-datasource-button.webp)
Search for and select **TDengine**.
![Add datasource](./assets/howto-add-datasource-tdengine.png)
![Add datasource](./assets/howto-add-datasource-tdengine.webp)
Configure the TDengine datasource.
![Datasource Configuration](./assets/howto-add-datasource.png)
![Datasource Configuration](./assets/howto-add-datasource.webp)
Save and test. It will report 'TDengine Data source is working' under normal circumstances.
![datasource test](./assets/howto-add-datasource-test.png)
![datasource test](./assets/howto-add-datasource-test.webp)
### Importing dashboards
Point to **+** / **Create** - **import** (or `/dashboard/import` url).
![Import Dashboard and Configuration](./assets/import_dashboard.png)
![Import Dashboard and Configuration](./assets/import_dashboard.webp)
Type the dashboard ID `15167` in the **Import via grafana.com** location and **Load**.
![Import via grafana.com](./assets/import-dashboard-15167.png)
![Import via grafana.com](./assets/import-dashboard-15167.webp)
Once the import is complete, the full page view of TDinsight is shown below.
![show](./assets/TDinsight-full.png)
![show](./assets/TDinsight-full.webp)
## TDinsight dashboard details
......@@ -269,7 +269,7 @@ Details of the metrics are as follows.
### Cluster Status
![tdinsight-mnodes-overview](./assets/TDinsight-1-cluster-status.png)
![tdinsight-mnodes-overview](./assets/TDinsight-1-cluster-status.webp)
This section contains the current information and status of the cluster, the alert information is also here (from left to right, top to bottom).
......@@ -289,7 +289,7 @@ This section contains the current information and status of the cluster, the ale
### DNodes Status
![tdinsight-mnodes-overview](./assets/TDinsight-2-dnodes.png)
![tdinsight-mnodes-overview](./assets/TDinsight-2-dnodes.webp)
- **DNodes Status**: simple table view of `show dnodes`.
- **DNodes Lifetime**: the time elapsed since the dnode was created.
......@@ -298,14 +298,14 @@ This section contains the current information and status of the cluster, the ale
### MNode Overview
![tdinsight-mnodes-overview](./assets/TDinsight-3-mnodes.png)
![tdinsight-mnodes-overview](./assets/TDinsight-3-mnodes.webp)
1. **MNodes Status**: a simple table view of `show mnodes`. 2.
2. **MNodes Number**: similar to `DNodes Number`, the number of MNodes changes.
### Request
![tdinsight-requests](./assets/TDinsight-4-requests.png)
![tdinsight-requests](./assets/TDinsight-4-requests.webp)
1. **Requests Rate(Inserts per Second)**: average number of inserts per second.
2. **Requests (Selects)**: number of query requests and change rate (count of second).
......@@ -313,7 +313,7 @@ This section contains the current information and status of the cluster, the ale
### Database
![tdinsight-database](./assets/TDinsight-5-database.png)
![tdinsight-database](./assets/TDinsight-5-database.webp)
Database usage, repeated for each value of the variable `$database` i.e. multiple rows per database.
......@@ -325,7 +325,7 @@ Database usage, repeated for each value of the variable `$database` i.e. multipl
### DNode Resource Usage
![dnode-usage](./assets/TDinsight-6-dnode-usage.png)
![dnode-usage](./assets/TDinsight-6-dnode-usage.webp)
Data node resource usage display with repeated multiple rows for the variable `$fqdn` i.e., each data node. Includes.
......@@ -346,13 +346,13 @@ Data node resource usage display with repeated multiple rows for the variable `$
### Login History
![Login History](./assets/TDinsight-7-login-history.png)
![Login History](./assets/TDinsight-7-login-history.webp)
Currently, only the number of logins per minute is reported.
### Monitoring taosAdapter
![taosadapter](./assets/TDinsight-8-taosadapter.png)
![taosadapter](./assets/TDinsight-8-taosadapter.webp)
Support monitoring taosAdapter request statistics and status details. Includes.
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docs-en/20-third-party/01-grafana.mdx
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......@@ -62,15 +62,15 @@ GF_PLUGINS_ALLOW_LOADING_UNSIGNED_PLUGINS=tdengine-datasource
Users can log in to the Grafana server (username/password: admin/admin) directly through the URL `http://localhost:3000` and add a datasource through `Configuration -> Data Sources` on the left side, as shown in the following figure.
![img](./grafana/add_datasource1.jpg)
![img](./grafana/add_datasource1.webp)
Click `Add data source` to enter the Add data source page, and enter TDengine in the query box to add it, as shown in the following figure.
![img](./grafana/add_datasource2.jpg)
![img](./grafana/add_datasource2.webp)
Enter the datasource configuration page, and follow the default prompts to modify the corresponding configuration.
![img](./grafana/add_datasource3.jpg)
![img](./grafana/add_datasource3.webp)
- Host: IP address of the server where the components of the TDengine cluster provide REST service (offered by taosd before 2.4 and by taosAdapter since 2.4) and the port number of the TDengine REST service (6041), by default use `http://localhost:6041`.
- User: TDengine user name.
......@@ -78,13 +78,13 @@ Enter the datasource configuration page, and follow the default prompts to modif
Click `Save & Test` to test. Follows are a success.
![img](./grafana/add_datasource4.jpg)
![img](./grafana/add_datasource4.webp)
### Create Dashboard
Go back to the main interface to create the Dashboard, click Add Query to enter the panel query page:
![img](./grafana/create_dashboard1.jpg)
![img](./grafana/create_dashboard1.webp)
As shown above, select the `TDengine` data source in the `Query` and enter the corresponding SQL in the query box below for query.
......@@ -94,7 +94,7 @@ As shown above, select the `TDengine` data source in the `Query` and enter the c
Follow the default prompt to query the average system memory usage for the specified interval on the server where the current TDengine deployment is located as follows.
![img](./grafana/create_dashboard2.jpg)
![img](./grafana/create_dashboard2.webp)
> For more information on how to use Grafana to create the appropriate monitoring interface and for more details on using Grafana, refer to the official Grafana [documentation](https://grafana.com/docs/).
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......@@ -44,25 +44,25 @@ Since the configuration interface of EMQX differs from version to version, here
Use your browser to open the URL `http://IP:18083` and log in to EMQX Dashboard. The initial installation username is `admin` and the password is: `public`.
![img](./emqx/login-dashboard.png)
![img](./emqx/login-dashboard.webp)
### Creating Rule
Select "Rule" in the "Rule Engine" on the left and click the "Create" button: !
![img](./emqx/rule-engine.png)
![img](./emqx/rule-engine.webp)
### Edit SQL fields
![img](./emqx/create-rule.png)
![img](./emqx/create-rule.webp)
### Add "action handler"
![img](./emqx/add-action-handler.png)
![img](./emqx/add-action-handler.webp)
### Add "Resource"
![img](./emqx/create-resource.png)
![img](./emqx/create-resource.webp)
Select "Data to Web Service" and click the "New Resource" button.
......@@ -70,13 +70,13 @@ Select "Data to Web Service" and click the "New Resource" button.
Select "Data to Web Service" and fill in the request URL as the address and port of the server running taosAdapter (default is 6041). Leave the other properties at their default values.
![img](./emqx/edit-resource.png)
![img](./emqx/edit-resource.webp)
### Edit "action"
Edit the resource configuration to add the key/value pairing for Authorization. Please refer to the [ TDengine REST API documentation ](https://docs.taosdata.com/reference/rest-api/) for the authorization in details. Enter the rule engine replacement template in the message body.
![img](./emqx/edit-action.png)
![img](./emqx/edit-action.webp)
## Compose program to mock data
......@@ -163,7 +163,7 @@ Edit the resource configuration to add the key/value pairing for Authorization.
Note: `CLIENT_NUM` in the code can be set to a smaller value at the beginning of the test to avoid hardware performance be not capable to handle a more significant number of concurrent clients.
![img](./emqx/client-num.png)
![img](./emqx/client-num.webp)
## Execute tests to simulate sending MQTT data
......@@ -172,19 +172,19 @@ npm install mqtt mockjs --save ---registry=https://registry.npm.taobao.org
node mock.js
```
![img](./emqx/run-mock.png)
![img](./emqx/run-mock.webp)
## Verify that EMQX is receiving data
Refresh the EMQX Dashboard rules engine interface to see how many records were received correctly:
![img](./emqx/check-rule-matched.png)
![img](./emqx/check-rule-matched.webp)
## Verify that data writing to TDengine
Use the TDengine CLI program to log in and query the appropriate databases and tables to verify that the data is being written to TDengine correctly:
![img](./emqx/check-result-in-taos.png)
![img](./emqx/check-result-in-taos.webp)
Please refer to the [TDengine official documentation](https://docs.taosdata.com/) for more details on how to use TDengine.
EMQX Please refer to the [EMQX official documentation](https://www.emqx.io/docs/en/v4.4/rule/rule-engine.html) for details on how to use EMQX.
docs-en/20-third-party/11-kafka.md
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......@@ -9,11 +9,11 @@ TDengine Kafka Connector contains two plugins: TDengine Source Connector and TDe
Kafka Connect is a component of Apache Kafka that enables other systems, such as databases, cloud services, file systems, etc., to connect to Kafka easily. Data can flow from other software to Kafka via Kafka Connect and Kafka to other systems via Kafka Connect. Plugins that read data from other software are called Source Connectors, and plugins that write data to other software are called Sink Connectors. Neither Source Connector nor Sink Connector will directly connect to Kafka Broker, and Source Connector transfers data to Kafka Connect. Sink Connector receives data from Kafka Connect.
![](kafka/Kafka_Connect.png)
![](kafka/Kafka_Connect.webp)
TDengine Source Connector is used to read data from TDengine in real-time and send it to Kafka Connect. Users can use The TDengine Sink Connector to receive data from Kafka Connect and write it to TDengine.
![](kafka/streaming-integration-with-kafka-connect.png)
![](kafka/streaming-integration-with-kafka-connect.webp)
## What is Confluent?
......@@ -26,7 +26,7 @@ Confluent adds many extensions to Kafka. include:
5. GUI for managing and monitoring Kafka - Confluent Control Center
Some of these extensions are available in the community version of Confluent. Some are only available in the enterprise version.
![](kafka/confluentPlatform.png)
![](kafka/confluentPlatform.webp)
Confluent Enterprise Edition provides the `confluent` command-line tool to manage various components.
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docs-en/21-tdinternal/01-arch.md
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......@@ -11,7 +11,7 @@ The design of TDengine is based on the assumption that any hardware or software
Logical structure diagram of TDengine distributed architecture as following:
![TDengine architecture diagram](structure.png)
![TDengine architecture diagram](structure.webp)
<center> Figure 1: TDengine architecture diagram </center>
A complete TDengine system runs on one or more physical nodes. Logically, it includes data node (dnode), TDengine client driver (TAOSC) and application (app). There are one or more data nodes in the system, which form a cluster. The application interacts with the TDengine cluster through TAOSC's API. The following is a brief introduction to each logical unit.
......@@ -54,7 +54,7 @@ A complete TDengine system runs on one or more physical nodes. Logically, it inc
To explain the relationship between vnode, mnode, TAOSC and application and their respective roles, the following is an analysis of a typical data writing process.
![typical process of TDengine](message.png)
![typical process of TDengine](message.webp)
<center> Figure 2: Typical process of TDengine </center>
1. Application initiates a request to insert data through JDBC, ODBC, or other APIs.
......@@ -123,7 +123,7 @@ If a database has N replicas, thus a virtual node group has N virtual nodes, but
Master Vnode uses a writing process as follows:
![TDengine Master Writing Process](write_master.png)
![TDengine Master Writing Process](write_master.webp)
<center> Figure 3: TDengine Master writing process </center>
1. Master vnode receives the application data insertion request, verifies, and moves to next step;
......@@ -137,7 +137,7 @@ Master Vnode uses a writing process as follows:
For a slave vnode, the write process as follows:
![TDengine Slave Writing Process](write_slave.png)
![TDengine Slave Writing Process](write_slave.webp)
<center> Figure 4: TDengine Slave Writing Process </center>
1. Slave vnode receives a data insertion request forwarded by Master vnode;
......@@ -267,7 +267,7 @@ For the data collected by device D1001, the number of records per hour is counte
TDengine creates a separate table for each data collection point, but in practical applications, it is often necessary to aggregate data from different data collection points. In order to perform aggregation operations efficiently, TDengine introduces the concept of STable. STable is used to represent a specific type of data collection point. It is a table set containing multiple tables. The schema of each table in the set is the same, but each table has its own static tag. The tags can be multiple and be added, deleted and modified at any time. Applications can aggregate or statistically operate all or a subset of tables under a STABLE by specifying tag filters, thus greatly simplifying the development of applications. The process is shown in the following figure:
![Diagram of multi-table aggregation query](multi_tables.png)
![Diagram of multi-table aggregation query](multi_tables.webp)
<center> Figure 5: Diagram of multi-table aggregation query </center>
1. Application sends a query condition to system;
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docs-en/25-application/01-telegraf.md
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This article introduces how to quickly build a TDengine + Telegraf + Grafana based IT DevOps visualization system without writing even a single line of code and by simply modifying a few lines of configuration files. The architecture is as follows.
![IT-DevOps-Solutions-Telegraf.png](/img/IT-DevOps-Solutions-Telegraf.png)
![IT-DevOps-Solutions-Telegraf.webp](./IT-DevOps-Solutions-Telegraf.webp)
## Installation steps
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Click on the gear icon on the left and select `Plugins`, you should find the TDengine data source plugin icon.
Click on the plus icon on the left and select `Import` to get the data from `https://github.com/taosdata/grafanaplugin/blob/master/examples/telegraf/grafana/dashboards/telegraf-dashboard- v0.1.0.json`, download the dashboard JSON file and import it. You will then see the dashboard in the following screen.
![IT-DevOps-Solutions-telegraf-dashboard.png](/img/IT-DevOps-Solutions-telegraf-dashboard.png)
![IT-DevOps-Solutions-telegraf-dashboard.webp](./IT-DevOps-Solutions-telegraf-dashboard.webp)
## Wrap-up
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docs-en/25-application/02-collectd.md
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This article introduces how to quickly build an IT DevOps visualization system based on TDengine + collectd / StatsD + Grafana without writing even a single line of code but by simply modifying a few lines of configuration files. The architecture is shown in the following figure.
![IT-DevOps-Solutions-Collectd-StatsD.png](/img/IT-DevOps-Solutions-Collectd-StatsD.png)
![IT-DevOps-Solutions-Collectd-StatsD.webp](./IT-DevOps-Solutions-Collectd-StatsD.webp)
## Installation Steps
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Download the dashboard json from `https://github.com/taosdata/grafanaplugin/blob/master/examples/collectd/grafana/dashboards/collect-metrics-with-tdengine-v0.1.0.json`, click the plus icon on the left and select Import, follow the instructions to import the JSON file. After that, you can see
The dashboard can be seen in the following screen.
![IT-DevOps-Solutions-collectd-dashboard.png](/img/IT-DevOps-Solutions-collectd-dashboard.png)
![IT-DevOps-Solutions-collectd-dashboard.webp](./IT-DevOps-Solutions-collectd-dashboard.webp)
#### import collectd dashboard
Download the dashboard json file from `https://github.com/taosdata/grafanaplugin/blob/master/examples/collectd/grafana/dashboards/collect-metrics-with-tdengine-v0.1.0.json`. Download the dashboard json file, click the plus icon on the left side and select `Import`, and follow the interface prompts to select the JSON file to import. After that, you can see
dashboard with the following interface.
![IT-DevOps-Solutions-collectd-dashboard.png](/img/IT-DevOps-Solutions-collectd-dashboard.png)
![IT-DevOps-Solutions-collectd-dashboard.webp](./IT-DevOps-Solutions-collectd-dashboard.webp)
#### Importing the StatsD dashboard
Download the dashboard json from `https://github.com/taosdata/grafanaplugin/blob/master/examples/statsd/dashboards/statsd-with-tdengine-v0.1.0.json`. Click on the plus icon on the left and select `Import`, and follow the interface prompts to import the JSON file. You will then see the dashboard in the following screen.
![IT-DevOps-Solutions-statsd-dashboard.png](/img/IT-DevOps-Solutions-statsd-dashboard.png)
![IT-DevOps-Solutions-statsd-dashboard.webp](./IT-DevOps-Solutions-statsd-dashboard.webp)
## Wrap-up
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docs-en/25-application/03-immigrate.md
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The following figure (Figure 1) shows the system's overall architecture for a typical DevOps application scenario.
**Figure 1. Typical architecture in a DevOps scenario**
![IT-DevOps-Solutions-Immigrate-OpenTSDB-Arch](/img/IT-DevOps-Solutions-Immigrate-OpenTSDB-Arch.jpg "Figure 1. Typical architecture in a DevOps scenario")
![IT-DevOps-Solutions-Immigrate-OpenTSDB-Arch](./IT-DevOps-Solutions-Immigrate-OpenTSDB-Arch.webp "Figure 1. Typical architecture in a DevOps scenario")
In this application scenario, there are Agent tools deployed in the application environment to collect machine metrics, network metrics, and application metrics. Data collectors to aggregate information collected by agents, systems for persistent data storage and management, and tools for monitoring data visualization (e.g., Grafana, etc.).
......@@ -75,7 +75,7 @@ After writing the data to TDengine properly, you can adapt Grafana to visualize
TDengine provides two sets of Dashboard templates by default, and users only need to import the templates from the Grafana directory into Grafana to activate their use.
**Importing Grafana Templates** Figure 2.
![](/img/IT-DevOps-Solutions-Immigrate-OpenTSDB-Dashboard.jpg "Figure 2. Importing a Grafana Template")
![](./IT-DevOps-Solutions-Immigrate-OpenTSDB-Dashboard.webp "Figure 2. Importing a Grafana Template")
After the above steps, you completed the migration to replace OpenTSDB with TDengine. You can see that the whole process is straightforward, there is no need to write any code, and only some configuration files need to be adjusted to meet the migration work.
......@@ -88,7 +88,7 @@ In most DevOps scenarios, if you have a small OpenTSDB cluster (3 or fewer nodes
Suppose your application is particularly complex, or the application domain is not a DevOps scenario. You can continue reading subsequent chapters for a more comprehensive and in-depth look at the advanced topics of migrating an OpenTSDB application to TDengine.
**Figure 3. System architecture after migration**
![IT-DevOps-Solutions-Immigrate-TDengine-Arch](/img/IT-DevOps-Solutions-Immigrate-TDengine-Arch.jpg "Figure 3. System architecture after migration completion")
![IT-DevOps-Solutions-Immigrate-TDengine-Arch](./IT-DevOps-Solutions-Immigrate-TDengine-Arch.webp "Figure 3. System architecture after migration completion")
## Migration evaluation and strategy for other scenarios
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