Show TOC

 Configuring Other Global Data File Parameters

Use

The Display settings for data extraction screen allows you to specify various global parameters for the extracted files, such as maximum file size.

Procedure

  1. From the main DART menu, choose

    Configuration → Data extracts → Technical settings .

    The Display settings for data extraction screen appears first in display mode.

  2. Choose Display<-> Change to place the screen in change mode.

  3. Enter data into the Technical settings screen as described below.

Field

Description

Maximum file size (MB)

This field specifies the maximum size of the file created by the Extraction utility. Size is specified in Megabytes. If the amount of extracted data is too large to fit into the file, the system creates multiple physical files for the extracted data.

If you intend to store the resulting files directly on a CD-ROM, specify maximum file size of no more than 600 MB.

Also, consider the limit set by your operating system for file size in a single directory.

Maximum memory allocation for index (MB)

Increase or decrease the maximum memory allocation on the application server for building data segment indexes.

Package size for data collection

Change package size . By default the extraction utility selects data from the database in packages of 100 records at a time. You can increase or decrease this number. In some cases a smaller value should be chosen in order to reduce memory consumption.

Require ISO 9660 compliant file names

ISO 9660 is a standard for CD-ROM file systems. Most CD-ROM readers are able to read CD-ROM disks written using this standard.

If you set this indicator, the system only accepts file names that follow the ISO 9660 standard. In most cases, there is no need to set this indicator.

Enable test run with limited data volume

If you set this indicator, then the Extract data screen displays the Maximum number of documents field, allowing the user to run a test extract with a limited amount of records.

Running a test extraction is useful for creating a base case for estimating the size, run time, and other parameters of extractions on your application server.

Compress data

If you set this indicator, the Compress data indicator appears as set by default when the user calls the Extract data screen. The user can then turn this indicator off or on.

If data compression is on, then the resulting extract files are smaller, but execution time increases.

Calculate data checksums

If you set this indicator, the Calculate data checksums indicator appears as set by default when the user calls the Extract data screen. The user can then turn this indicator off or on. See the topic Enabling Checksum Calculations .

If Calculate data checksums is on, the system calculates checksum numbers for each of the segments that are extracted. You can use these checksums later to verify the integrity of the data extract file .