Archive files

Click the
Archive Files
 option to view archived system statistics.
Archive files
FactoryTalk Historian ME stores your data in archives, which are the files that hold FactoryTalk Historian ME data. Archive files are fixed which means that they are always the same size, regardless of how much data they contain.
The archive receiving current data is called the
primary archive
. When the primary archive becomes full, an archive shift occurs, and the next available archive becomes the new primary archive. When the primary archive is being backed up, you cannot modify that archive or the Point database.
Each archive file contains events for a time period specified by the archive start time and end time. The archive files on each FactoryTalk Historian ME server should cover all-time ranges, without overlapping time ranges or gaps in time. A list of archive files stored on FactoryTalk Historian ME is displayed by default when you select the
Archive Files
 option.
The
Archive Files
 section displays the following information:
Item
Description
Archive File
The archive file name, which includes the full path.
Status
The archive status displays one of the following:
  • Primary - the archive file that is currently receiving data.
  • Has Data - indicates that the archive file contains data and is full.
  • Empty - indicates that the archive has no data.
Size (MB)
The archive file size in megabytes.
Start Time
The time that data was first written to the archive file.
End Time
The time that data was last written to the archive file.
Lifetime
The archive file age in days, hours, minutes, and seconds.
Last Modified Time
The last time and date the archive file was modified.
Backup Time
The last time and date the archive file was backed up. Never indicates that the file has never been backed up.
State
The state of the file:
  • Created
  • Initialized
  • Dismounted
  • Mounted
Type
Indicates the type of file, which is always
Fixed size
.
Write Flag
Specifies if a file is writable or read-only.
Shift Flag
Specifies if a file is shiftable or not shiftable.
Add Rate/Hour
The rate at which files are added to the archive per hour.
% Full
The percentage of the archive that is being used.
Annotations
The size in bytes of the annotation file associated with the archive file.
Annotation File Size
The size in megabytes of the annotation file associated with the archive file.
Shift Prediction
The target archive or the predicted shift time.
Primary Offset
The number that indicates the number of primary archive records in use.
Overflow Offset
The number that indicates the number of overflow records in use.
Record Size
The record size for each archive record.
Version
The version of the archive header.
#
The archive number used by FactoryTalk Historian ME.
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