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       
(Showing Draft Content)

仪表板数据刷新

功能概述

用户经常需要将制作的仪表板用作大屏展示,因此常常需要将仪表板数据设置为自动刷新,也即仪表板自动显示最新的数据。

我们知道仪表板的数据来自于数据集或数据模型,那么怎样才能实现最终的自动刷新呢?本节就为您具体介绍。

数据刷新方式的设置

有两个入口可设置仪表板组件的刷新:

  • 数据管理面板

  • 组件的属性设置面板

在数据管理面板设置

打开仪表板的数据管理面板,选择需要设定自动刷新的数据集

image

在弹出的对话框中选择刷新方式,所有绑定了该数据集或数据模型的可视化组件,都会根据所设的刷新方式进行刷新。

在可视化组件的面板中进行设置

选择可视化组件,打开属性设置面板,在数据交互板块中,展开自动刷新下拉列表,选择所需的刷新方式。

与在数据管理面板中进行设置一致,当为组件所绑定数据指定刷新方式,那么所有绑定该数据的组件都会以同样的方式进行刷新。

image

刷新方式的说明

该选项为默认值。

选择该选项时,仪表板组件不会自动进行刷新。仪表板处于被打开时,即使数据发生变化,使用了该数据的组件也不会进行刷新。

只有在新打开仪表板、刷新浏览器或点击仪表板刷新时,才会去请求新的数据。

定时刷新

选择定时刷新作为自动刷新方式,用户可以指定时间间隔,定时去请求新的数据。

可以通过输入或选择来进行时间间隔的设定。各段数字代表的含义为“日”、“时”、“分”和“秒”。

image2020-6-17_15-8-12.png

实时刷新

选择实时刷新作为自动刷新方式,当数据发生了变化,主动向仪表板推送数据,触发组件的刷新,实现数据的实时展示。

适合于对数据实时性要求比较高的场景,比如:IoT物联网分析、智慧车间生成监控大屏、智慧校园可视化管理等,这些场景通常要在秒级、分钟级反映出最新的数据情况,进行数据预警,然后管理人员才能采取相应的措施。

type=info

提示

使用同一数据集或模型的组件,其刷新设置会自动保持一致。如果想要为各组件设置不同的刷新间隔,需组件使用不同的数据集/模型。

不同的数据集支持不同的刷新方式

缓存数据集/缓存数据模型

  • 定时刷新

  • 实时刷新

推送数据集/流式数据集

  • 定时刷新

  • 实时刷新

直连数据集/直连数据模型

  • 定时刷新

物联网数据

  • 定时刷新

  • 实时刷新(默认)

原生查询数据集

  • 定时刷新