Skkynet DataHub 10.0：实时数据库与元数据管理指南

元数据管理

datahub

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《DataHub用户手册》是一份由Skkynet Cloud Systems, Inc.及其子公司和许可方发布的详细文档，着重于Linkin元数据管理和DataHub软件的全面指南。这份手册涵盖了DataHub的各个核心功能和组件，使其成为连接、聚合和分发实时过程数据的强大工具。以下是部分内容的详细解读： 1. **嵌入式设备 (Embedded Devices)**: DataHub支持与各种嵌入式设备集成，这使得它能够处理来自物联网（IoT）设备的实时数据，如工业自动化设备中的传感器和控制器。 2. **服务器/客户端 (Server/Client)**: 提供安全的服务器模式，允许用户在云端或本地部署DataHub服务，同时提供客户端接口，方便用户访问和管理数据。 3. **Excel**: 数据可以通过Excel进行导入和导出，便于数据分析师处理和分析DataHub中的数据。 4. **摄像头 (Cameras)**: 支持视频监控系统的集成，实时传输视频流，并将视频元数据与过程数据相结合，提供全面的数据视图。 5. **报警与通知 (Alarms & Notifications)**: 数据Hub具有报警系统，当预设条件满足时发送实时通知，有助于快速响应生产过程中的异常情况。 6. **历史记录 (Historian)**: 作为一个持久化的数据存储解决方案，DataHub的历史记录功能用于长期保存和查询数据，便于数据分析和追溯。 7. **数据库 (Database)**: 提供对多种数据库的支持，包括实时数据库，以实现高效的数据存储和检索。 8. **定制网络/隧道 (Custom Network/Tunnel)**: 数据通过定制网络或隧道传输，确保数据的安全性和私密性，适应不同企业环境的需求。 9. **Azure、AWS、Google服务集成 (Azure, AWS, Google)**: DataHub与云计算平台紧密集成，允许用户在多个云服务之间无缝迁移和共享数据。 10. **OPC标准支持 (OPCUA, OPC DA, OPCA&E, Tunnelling, Bridging)**: 提供OPC (开放平台通信) 标准兼容性，确保与工业自动化设备和第三方系统的兼容性和互操作性。 11. **数据写入/查询 (Write to Database, Query Database)**: 用户可以方便地将数据写入或查询DataHub，进行数据操作和维护。 12. **Web服务器/WebView (WebServer, WebView)**: Web服务接口允许外部应用程序通过浏览器访问DataHub，提供可视化和数据共享功能。 13. **MQTT (MQTT Client, MQTT Broker)**: 支持MQTT协议，适用于低带宽、高可靠性的物联网设备通信。 14. **历史学家 (Historians)**: 数据Hub集成的历史学家功能支持长时间跨度的数据存储和回溯，是故障排查和趋势分析的重要工具。 15. **Modbus和电子邮件 (Modbus, Email)**: 支持Modbus通信协议，用于与工业设备交互，并具备邮件通知功能，便于通知相关人员。《DataHub用户手册》详尽介绍了如何利用这一强大工具来管理元数据，实现跨设备、平台的数据交换，以及如何配置和优化数据的实时监控、存储和分析。对于任何涉及工业4.0、物联网或大数据处理的组织，这份手册都是不可或缺的技术参考资源。

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Installation

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instance switches to license mode, and each connected DataHub

instance then requires a license.

Licenses can be entered individually or loaded from a file.

• The Enter a License... button opens the Enter License String window:

Here you can paste or manually enter the text string for the license provided by Cogent.

• For DataHub version 10 and later, select everything including the {: and :}

characters.

• For DataHub versions 8 and 9, select everything including the first and last :

characters.

Running a DataHub instance on a Microsoft Azure virtual machine requires a

special license key. Contact Cogent for details. Normal practice is to use the

Skkynet DataHub managed application for Azure.

The license string may contain the characters l (lower case L) and 1 (one)

which can look nearly identical in some type fonts. If possible, it is best to

copy and paste the string, rather than retyping it.

• The Load License File... button opens a Windows file selection window. Browse to

find the directory and license file that you want to load. License files end with a .lic

extension. Once you have found the license file, click the Open button to load the file.

(Please refer to Configuration and License File Locations in Configuration Files for more

information on license file locations.)

To remove a license from your system, select one or more licenses in the Details window,

then click the Remove Selected button.

Troubleshooting License Installation

The possible causes of a license installation problem are:

1. Different DataHub version.Each DataHub version (v7, v8, v9, v10, etc.) has a

different license.

Skkynet Cloud Systems, Inc • 2233 Argentia Road • Suite 302 • Mississauga • ON • L5N 2X7 • 1.905.702.7851 • https://skkynet.com

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Installation

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2. Running on Azure.The DataHub program requires a special license key when running

on a Microsoft Azure virtual machine. Contact Cogent for details. Normal practice is to

use the Skkynet DataHub managed application for Azure.

3. A typographical error.If you are hand-entering the license key, watch out for

mistakes between lower case letters L and 1, and between the upper case letter O and

the numeral 0.

4. A copy/paste error.If you are copying and pasting the key, make sure that you

include the correct leading and trailing characters in the key.

• For DataHub version 10 and later, include the {: and :} characters.

• For DataHub versions 8 and 9, include the first and last : characters.

If you are having trouble with a copy/paste, try opening Notepad and copying the

license keys into it. Once the license keys are in Notepad, replace all of the "-" (minus

sign) characters in the license keys by selecting and re-typing the - sign. You might

notice that minus signs in the key are actually converted to something else, like a box

or an exclamation mark. You need to change them back, then try adding the license

code to the DataHub instance again.

5. Unicode characters.If you copy a space into the entry field, it may be a Unicode

space instead of an ASCII space. The entry field will automatically strip ASCII spaces,

but it cannot distinguish Unicode spaces. This could happen if you are working with a

non-English character set that defines its own space, such as Japanese.

6. Invalid duplicate key.The DataHub licenses.lic file may contain an invalid

license key with the same license number. To fix:

1. Delete the licenses.lic file from the DataHub configuration folder (usually C:

\Users\username\AppData\Roaming\Cogent DataHub).

2. Restart the DataHub instance.

3. Install the new license key.

If none of these are helpful, please contact support@skkynet.com and send a copy of the

licenses.lic file, along with the version number of the DataHub instance you have

installed it on.

Missing features

If the licenses are installed correctly, but you are not seeing all of the licensed features

in the Properties window, then it is possible that they were not enabled during the initial

install of the DataHub instance. You can check this by re-installing the DataHub software,

and ensuring that all of the features you need are checked in the Choose Components

step of the installation.

Skkynet Cloud Systems, Inc • 2233 Argentia Road • Suite 302 • Mississauga • ON • L5N 2X7 • 1.905.702.7851 • https://skkynet.com

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Installation

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/S indicates a silent install

/D indicates the base installation directory

There are certain restrictions with the /D argument:

• /D must be the last argument on the line

• The path name for /D must NOT contain quotes, even if the path contains spaces.

• There must not be spaces around the = sign in the /D argument

The installation will create two directories beneath the directory indicated by /D:

• The Cogent DataHub directory contains the DataHub installation.

• The DataSim directory contains the two data simulators.

Upgrading to a new version

Minor Version Upgrades

To upgrade to the latest minor release of the DataHub version you are currently using:

1. Go to the Downloads page of the DataHub website.

2. Check to see if there is a more recent release of the DataHub program than your

version.

3. If so, download it and install it over your existing DataHub installation. The new

version will automatically pick up any existing licenses and configuration.

Major Version Upgrades

To upgrade to a major new DataHub release, you need to first contact Cogent to obtain an

upgrade license. Then download the latest DataHub archive and follow one of these two

procedures:

•

Upgrade an existing DataHub installation

1. Install the new DataHub archive over your existing software.

The installer will automatically detect your existing license and configuration. Since

your license is not yet valid on this new version, it will not be used, and the DataHub

program will run in one-hour demo mode, with all features available.

2. Select the Licenses option. To see your existing license, check the Show unused

license keys box.

3. Install the upgrade license you received from Cogent. The license number of the

upgrade license must match the original license. If you have multiple upgrade

licenses for several add-on features, install each one, ensuring that it matches its

original.

Skkynet Cloud Systems, Inc • 2233 Argentia Road • Suite 302 • Mississauga • ON • L5N 2X7 • 1.905.702.7851 • https://skkynet.com

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