Interstage Shunsaku Data Manager Operator's Guide - Microsoft(R) Windows(R) 2000/ Microsoft(R) Windows Server(TM) 2003 - - UNIX -

D.3.2 The Size of Operation Log Files

The formula for estimating the size of operation log files is shown below.

Definition unit	Variable elements	Size (bytes)
Operation log file	Standard record size (bytes) Number of records updated during the backup cycle Safety factor (at least 1.3)	(100 + standard record size) x number of records updated during the backup cycle x safety factor

The number of records updated during the backup cycle is the number of records that are added, deleted, or updated from one backup of the director data files to the next.

Example Calculation

An example calculation for the size of an operation log file is shown below.

If the variable elements are as follows:

• Standard record size: 4,000 (bytes)
• Number of records updated during the backup cycle: 10,000
• Safety factor: 1.3

(100 + 4,000) x 10,000 x 1.3 = 53,300,000 bytes (approx. 51 MB)

Specify the calculation result for the size of a director data file to the MaxDataFileSize parameter in the director environment file.