ALPHA-VISION® Additional Backup for Recorded Files (ZipArchives): Systematics and Configuration

Systematics and Configuration

SUMMARY

CONTENTS

1. Systematics of data archiving
2. Destination drives (DestDrv/ZipDrv)
3. Copy settings
4. archive.dbf: Use of object number instead of PointId
5. Encoding
6. Vision2000.ini

At the end each cycle the data of the latest interval is archived from the log table to an interval table (naming convention: <MMDD_hh>.dbf), e. g. the last 3 hours, if a 3-hour interval was configured. This interval table is then compressed to a day archive (naming convention: <YYYYMMDD>.zip) at a given destination.

At start-up all data, which is found in the tables, but not in any of the compressed archives in the zip drive, will be archived before the cyclic process starts:

ZipDrv	Data archiving at start-up
No zip files	All data found in the log tables is compressed and saved in the corresponding files
Zip files up to date (a interval table for the current interval is already compressed)	The compressed interval table for the current interval is deleted, as it will be written completely at the end of the interval.
Zip files are not up to date, there is still data found in the log tables for the latest compressed interval table	The data belonging to the latest compressed intervall table is added to this table, as far as it is missing. All more recent data is compressed and saved to the corresponding newly created day archives.
Zip files are not up to date, no data found in the log tables for the latest compressed interval table	All data is compressed and saved to the corresponding newly created day archives.
Zip files can not be accessed	All found zip files are saved as '.zip.bak', after that all data found in the log tables is compressed and saved to the corresponding newly created day archives.
Zip files, which do not follow the naming conventions	Ignored

At shut down the data of the currently running interval is saved and compressed.

It is possible to save the UT and LT of each cycle in a text file associated to the day archive, to make a later analysis easier.

The day archives are stored in the location given by the ZipDrv entry in the Vision2000.ini. If there is no path given in the ini file, the files are stored in a folder named 'ZipArchives' in the directory, where ALPHA-VISION^®AvZipArchives is found.

Additionally there is the possiblity to copy the files from the zip directory to another directory given by the DestDrv entry.

The storage capacity of DestDrv may be displayed by 3 ACI objects (used memory in MB and percent and a flag to indicate 90% used memory).
There is also an ACI object to monitor the ZipDrv (used memory in percent).

Default
After each compression the day archive is copied from the ZipDrv to the DestDrv.
In case of a successful copy process, the day archive in the ZipDrv will be deleted at midnight, to make space for the next day archive.

Copy on demand
The automatic copy process can be deactivated. The copy process may then be started manually by the use of the data object _COPYDEMAND. If the value of this data object is set to 1 during Runtime, ALPHA-VISION^®AvZipArchives starts to copy and resets the value to 0 after the copy process has finished.

Erasing of day archives
The erasing of the day archive in the ZipDrv at midnight may be deactivated.

In the day archive it is possible to replace the PointId used in the _archive.dbf log table with the according object number. The number is saved as string in the PointId data field.

Next to compressing ALPHA-VISION^®AvZipArchives also offers a option to encode the saved data. See encryption functionality

INI-FILES

Section [ZipArchives]

[ZipArchives]
Dbf_1=_archive
Dbf_2=_eventlog
					

[ZipArchives]
Path_1=c:\bin\ArchiveDir
Path_2=c:\bin\EventlogDir