VHS Data Thinner Utility
The VHS Data Thinner utility is used to delete entries from the VHS by thinning dense data while maintaining the trend and integrity of each point. The thinner executes the rules saved to an XML file by the VHS Data Analyzer. The thinner can delete at most a few thousand entries per second so it may take days to complete a single cycle of thinning with a large VHS. Since entries are constantly aging, the thinner can be run continuously to keep up to date. After the initial thinning run, subsequent cycles should take significantly less time to execute.
When applying a thinning model to the VHS the thinner will most likely loop through the same entries multiple times. Once a set of entries has been thinned, no more entries should be deleted with subsequent thinning runs. To prevent each execution of the thinner from thinning the same points, the thinner caches the point at which it completed the previous thinning cycle. For this reason it is important to always run the thinner on the same machine.
See Scheduling Data Thinning for information about running the VHS Data Thinner from a command line.
Note: All changes performed on a VHS, including those from the Data Thinner, are propagated to replicated and forwarded services. Thinning cannot be performed directly on a replicated VHS as it is read-only.
VHS Data Thinner is stored in the CygNet\Utilities directory (VhsDataThinner.exe) on the host server.
Starting VHS Data Thinner
Installing and Launching
To install and launch (start) the application or utility using version management:
- Use CygNet Client Installer to install and launch the application. Once installed you can use CygNet Client Installer to start the application.
-OR-
- If previously installed, click Start > All Programs > CygNet > <name of the application or utility> or double-click the desktop shortcut.
Alternatively, browse to the CygNet\Utilities directory using Windows Explorer and double-click the program icon. You can also start an application or utility from a command line. These methods do not provide version management.
The VHS Data Thinner dialog box appears.
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