User Guide

After-image extent sizing based on weekly data

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

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) |

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Progress® OpenEdge® Release 11.7