Using the total size of after-image extents for one full workweek, the sizing calculations described in the following table are performed.

Table 1. After-image extent sizing calculations (weekly data)
Description Measurement/estimate
Total after-image data generated in one typical week 15000MB, or 14.6 GB
OpenEdge Replication after-image overhead 50%, or 1.5 multiplier
Number of processing hours during a typical workday 16 hours per day
Number of processing hours during the typical workweek 112 hours (16 hours per day x 7 days)
After-image data generated in one hour 134MB(15000MB / 112 hrs in week)
After-image data generated in one day 2144MB, or 2.09GB(134MB x 16 hours)
Estimate of after-image data generated in one hour with OpenEdge Replication overhead 201MB (134MB x 1.5)
Estimate of after-image data generated in one day with OpenEdge Replication overhead 3216MB, or 3.14GB(2144GB x 1.5)
Estimate of after-image data generated in one workweek with OpenEdge Replication overhead 22512MB (3,216MB x 7 days)
Single fixed after-image extent size 804MB (201MB x 4 hours)
Total number of after-image extents necessary to handle one week of processing 28 extents (22512MB / 804MB)