Disk Buffering
CAUTION: The buffer file path must be either
proj_dir/db/wincc_oa/nga
or a directory outside of
proj_dir/db/wincc_oa
. Otherwise inconsistencies during the redundancy synchronization could occur.Note: NGA delays the query of statistical functions until all necessary data present in buffer files is written to the database.
- Read Buffer Blocks after restart: This setting indicates if at startup of the NGA existing buffer files (from the last session) should be processed or not.
- Buffer files location: Directory for saving disk buffers. Default location (when empty) is
<projdir>/db/wincc_oa/nga
. Absolute and relative (to<projdir>/db/wincc_oa
) paths can be specified. - Buffer Files Prefix: As buffer file names are just numbers which increase over time, each backend has to have a specific prefix when storing all buffers in the same directory to avoid identical filenames across backends.