Merging a Historian Server

About this task

A typical scenario is to merge a Historian Server into an existing data store on another machine.

If your system architecture has evolved from multiple smaller servers into fewer large archives, you can eliminate the smaller machines while preserving all your tag configuration and collected data.

Consider the following example. You have two machines, Machine A and Machine B. Machine A is running current or any earlier version of Historian and has 100 tags and 10 archive files. The data of these tags are collected from the collector and is being queried by users. Machine B is running the current version of Historian.

Note:
  • This example does not include Alarm migration. If Machine A was being used to store alarms, then you need to migrate those before eliminating Machine A.
  • You cannot migrate tags with Enumerated Data Sets. If you want to migrate data for Enumerated Data Sets, then you must create the Enumerated Data Sets in Historian Administrator or Microsoft Excel and then migrate the tags.
  • To migrate tags which are condition based triggers, then you must create the condition-based triggers for that tag in Historian Administrator or Microsoft Excel and then migrate the tags.

You can migrate data only if the file format of the archive files format is .IHA. If the back-up archive is in .zip format, extract the zip files and copy all the .IHA files separately in a folder.

Procedure

  1. Before migrating, copy the .IHC and all the .IHA files from Machine A to Machine B.
  2. Launch the Migration Tool (MigrateIHA.exe for 32-bit or MigrateIHA_x64.exe for 64-bit) with Administrator privileges.
  3. Select Options > Configure Options.
  4. In the Server pane, enter the Server name.
  5. In the Tags to Migrate pane, ensure that the Migrate All Tags option is selected
  6. In the Options pane, enter the IHC File path in the Config File path field, using the browse button. he path you enter is the path to the .IHC file brought over from Machine A.
  7. In the Time to Migrate pane, ensure the Use IHA TimeFrame option is selected.
  8. Ensure Throttle Output is selected.
  9. To migrate the data, select File > Migrate Historical Data and select the archive file that has the oldest data.
    The tags and data are migrated to the default data store in time slices. The MigrateIHA window displays the progress and any Tag Add or Data Add errors are displayed in the log file. You can estimate the remaining time by watching the progress.
  10. Repeat the previous steps for each of the remaining archives, from oldest to newest data.
  11. Add the collector to the Historian Server on Machine B.
    See the Adding a Data Collector to an Historian Server topic in Data Collectors - General.