VHS Utilities

CygNet Software provides the following utilities for managing the data in your VHS. All CygNet utility files are found in the CygNet\Utilities folder on your host server.

Starting VHS Utilities

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.

CygNet Utility Name	Utility File Name	Description	Supported	Checks Security
History Export	CExport.exe	Export data from the VHS to a comma-separated values (CSV) file.
VHS Check	VhsCheck.exe VhsCheck64.exe	Perform a data integrity check on the VHS.
VHS Data Analyzer	VhsDataAnalyzer.exe	Determine the points in the VHS that are taking up the most hard drive space. Used with the VHS Data Thinner Utility.
VHS Data Thinner	VhsDataThinner.exe	Delete entries from the VHS by thinning dense data while maintaining the trend and integrity of each point. Used with the VHS Data Analyzer.
VHS Import/Export Utility	VhsImportExport.exe VhsImportExport64.exe	Import and export data from the VHS.
VHS Missing Data Detector	VhsMissingDataDetector.exe	Search the VHS and report missing point data.
VHS Recovery	VhsRecover.exe	Restore history data from journal files and backed-up history database files.

VHS Legacy Data Files

The following information applies to a VHS legacy datastore.

The three legacy data files (HISTORY.DAT, BLOCKNDX.DAT, and NAMES.DAT) are a matching set of service files. There is information within the files that interrelate with each other, so mixing data files from other VHS services would not be an acceptable practice. For example, data within the NAMES.DAT file is referenced in the HISTORY.DAT file.

The VHS marks the data files set with an identifier when it starts up and when it shuts down. This allows it to synchronize the file set so that it can detect if a particular data file does not belong with the others. If this situation occurs, the VHS will not start and will log that the data files do not match. This allows the VHS to enforce the rule that the set of data files must originate together from the same source, and that a single data file cannot be brought into the set from another service. This prevents the possibility of starting up the service in an unstable condition.

If for some reason an administrator feels that a set of files should go together despite the VHS reporting they are stamped differently, the VHS Check Utility can be used to reset the data file versions so that they can be used together. If the utility detects that the files do not match, an error message will be issued. You can then choose to resynchronize the files. This should not be a common occurrence and should be exercised with extreme caution. Although the VHS will start once the files have been resynchronized, if the data files are in fact not from the same origin then it is not guaranteed that all history data in the mismatching files will be preserved.

More:

CygNet History Export Utility

VHS Check Utility

VHS Data Analyzer Utility

VHS Data Thinner Utility

VHS Import/Export Utility

VHS Missing Data Detector Utility

VHS Recovery Utility