DataHub High Availability & Data Source Redundancy Solutions

Flexible Functionality, Many Scenarios 

High availability and redundancy mean different things to each user.  DataHub can address many scenarios, more than we can show. We encourage contacting us to discuss your application. 

Use cases supported include but not limited to:

  • High availability DataHub instances including at multiple levels by leveraging DataHub's secure real-time data tunneling functionality
  • Redundant data sources, not just OPC but many different data sources including OPC DA, UA, A&E, UA A&C, MQTT and more can be treated as redundant.  

The graphic here shows a single advanced scenario.  Please request a consultation to discuss your application.

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Data Source Redundancy 

When you have redundant data sources of all types, advanced functionality helps assure source availability

  • Multiple methods of triggering changeover
  • Allows the selection of a preferred data source.
  • No dependency on timers reduces switchover latencies
  • Complete access to both data sources at all times to facilitate collecting and presenting diagnostic information
  • Status tags indicate the state of Primary and Secondary sources
  • Control tag allows you to force failover with a single write
  • Native OPC UA Redundancy that doesn't flatten the hierarchy and namespace - other solutions convert to DA then back to UA in the redundancy - Datahub doesn't!

Flexible Data Source Changeover Triggers

  • Supports configuration of different changeover criteria for varying data sets and sources
  • Link monitoring quickly detects network breaks.
  • Event-based monitoring of points or link monitoring of the connection, or use both together.
  • Data Flow Detection can switch data sources when data stops changing, indicating a problem
  • Switchover can trigger on changes in point value or quality, for a single point or any point in a group.

The screen here shows a sampling of the many configuration options for DataHub data source redundancy.

Free Video Training

In this video you will learn how to setup the DataHub for redundant hot-standby data sources.

Specifically, you'll see how to setup redundancy for OPC UA data source and OPC DA data sources, though DataHub supports redundancy for any data sources that it supports.

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Data Source Redundancy Case Study

The Mukhaizna oil field in Oman started out using the DataHub for data aggregation and tunneling of data to feed data to SQL Server, OSI PI, and Iconics. 

To provide increased availability, the company has installed an additional OPC server at some locations. Working with Software Toolbox Product Support Engineers they added DataHub data source redundancy. If the quality of an indicator changes to “Bad” or “Not Connected” on the primary OPC server, the OPC DataHub immediately switches to the redundant OPC server and continues collecting data from there. 

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Redundancy for All Types of Data

Once you get data of any type - MQTT, OPC, DDE, Database, Excel, and more - into DataHub, that data can take advantage of the high-availability and redundancy capabilities of the DataHub. 

When you configure the data "domains" or groups of data, as you'll see in our training video, you can setup different changeover criteria for various collections and sources of data. 

In the example shown here, redundancy for OPC Alarms & Events Data is being implemented. 

If you are implementing high available pairs of DataHub instances, that adds a layer of protection on top of the source redundancy. 

Many Advanced & Powerful Scenarios Possible

DataHub can support a wide range of scenarios so we encourage you to talk with us before you decide DataHub can't handle your scenario.

Examples include:

  • Networked redundancy
  • Networked multiple-client redundancy
  • Multiple redundant pairs of networks, data sources, data servers 
  • High-available/redundant DataHub Instances

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Typical DataHub Features Used with Redundancy & High Availability Configurations

Having your system be able to ensure data availability is important.  It is also important to know when and how often a system has failed over so your team can take pro-active actions to prevent recurrence of problems and increase operational availability. 

DataHub offers more than just a source redundancy broker and ability to operate in high-availability pairs.  You can enable built-in features by licensing add-ons. The most popular ones used are:

  • Notifications - Email/SMS feature can notify the right people of failover and failback events.
  • Data Logging  - store changeover event & diagnostic details to SQL databases
  • System Monitor - monitor server and OS system health using DataHub's ability to monitor, notify, and log data from Windows Performance Counters

Request a quote to add these features to existing or include in new systems

Licensing DataHub Data Source Redundancy & High Availability

Redundancy & High Availability can be added to any DataHub Solution Pack. You can include the feature in a new license purchase or add it on later.

For pricing, please request a consultation first to discuss the specifics of your application requirement and then we can provide a quotation for your solution, including any expert services to help assure a rapid, successful implementation. 

All quotes for high availability and redundancy require a free technical consultation first.

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Get Started Now

This trial software is fully functioning and can be used to update licensed product provided you are on an active support & maintenance agreement.  Once DataHub is started it will run for 1 hour at a time, you can restart the application to reset this timer. Purchasing a license removes the limitation for licensed features. 

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