Integrated File System Introduction

 

Auxiliary storage requirements

Auxiliary storage requirements should be considered before converting the directories in a file system to the *TYPE2 format. There are several issues regarding auxiliary storage requirements:

• The final size of the directories after they have been converted to the *TYPE2 format
• Additional storage required while the conversion function is running

In many cases, the final size of a *TYPE2 directory is smaller than a *TYPE1 directory. Typically, *TYPE2 directories that have less than 350 objects require less auxiliary storage than *TYPE1 directories with the same number of objects. *TYPE2 directories with more than 350 objects are ten percent larger (on average) than *TYPE1 directories.

While the conversion function is running, additional storage is required. The conversion function requires that a number of directories have both a *TYPE1 version and a *TYPE2 version in existence simultaneously. This number is dependent on the iSeries server configuration and the directory structure of the file system being converted.

The *ESTIMATE option on the CVTDIR command will provide information indicating the amount of auxiliary storage estimated to be needed during conversion.

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