Interstage Shunsaku Data Manager Management Console Guide - Microsoft(R) Windows(R) 2000/ Microsoft(R) Windows Server(TM) 2003 -

2.1.2 Optimizing Director Data Files

After many deletions and updates, the amount of wasted space in the director data storage area may increase and affect the search function. Optimizing the director data removes the wasted storage area from the director data and solves the problem of deteriorating search times.

[Figure 2-3 Optimizing Director Data Files]

Evaluate the fragmentation rate to determine if the director data Files needs to be optimized.

Data fragmentation refers to the condition that occurs when data that should exist as a single block becomes scattered. The access efficiency deteriorates in proportion to the degree of fragmentation.

The fragmentation rate indicates the amount of unnecessary data left behind when processing is cancelled during deletion or update operations, as a percentage of the amount of required data stored in the director data file. Higher fragmentation rates indicate greater amounts of unnecessary data.

Figure 2-4 shows the task flow for optimizing the director data Files.

[Figure 2-4 Task Flow for Optimizing the Director Data Files]

1. In the navigation frame, click the director identifier.

   

2. In the operations frame, click the Status tab, and click the Refresh button to check the fragmentation rate.

   

3. If an increase in the fragmentation rate indicates that director data Files optimization is required, click the Tuning operations tab

   In Reallocate/Optimize, select the Optimize, then click the Execute button to optimize the director data Files.

   

4. Click the Status tab, and then click the Refresh button to verify that the fragmentation rate after optimization of the director data Files is 0%.

   

   

   • Data cannot be updated while the director data Files is being optimized.
   • An area twice the size of the director data file is used temporarily while the director data Files is being optimized.