Rockwell Automation 1756-HIST2G Historian ME 2.1 - Manual (Page 276)

F ACTORY T ALK H ISTORIAN ME M ODULE U SER G UIDE
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FactoryTalk Historian SE for data aggregation when long-term storage is
required.
By applying Compression and Exception Filtering, you can significantly improve
archive space from approximately two to ten times, depending on variables such
as how much the data varies between scans. To estimate archive performance with
and without Compression and Exception Filtering, can use a typical factor of 5.
Use the table below to estimate performance impact. Note that Compression and
Exception Filtering data storage information in this table is an estimate. Actual
compressed data storage ranges will vary with the volatility of the data collected.
Sample Application
Estimate
1GB Module 2GB Module
2500 events per second without
Compression or Exception Filtering
4 hours 14 hours
2500 events per second with
Compression and Exception Filtering
1 day 3 days
500 events per second with Compression
and Exception Filtering
5 days 2 weeks
100 events per second with Compression
and Exception Filtering
1 month 3 months
2500 events per minute without
Compression or Exception Filtering
10 days 1 month
2500 events per minute with
Compression and Exception Filtering
2 months 6 months
500 events per minute with Compression
and Exception Filtering
10 months 2.5 years
100 events per minute with Compression
and Exception Filtering
4 years 10+ years