Allocate a New VSAM Data Set

Use the Allocate New VSAM Data Set wizard to create a new VSAM data set.

Follow these steps:

1. Select Add to Directory List view if you want the new data set displayed in your Directory List view.

2. Complete the Model Data Set Name field if you want your new data set to copy the properties of another data set.

   1. Enter the name of a data set that exists on the server.

   2. Click Confirm.

3. Complete the fields in the Component DSNs section to define the data set name, location, and file type.

4. Select and complete one of the following sections:

   • Volume -- Complete the Data and Index fields to specify the volume that contains the data component of the VSAM that you are defining.

   • SMS Class -- Complete the Storage Class, Data Class, and Management Class fields to define the location and attributes of your new data set.

5. Select options for additional functionalities in the Options section. If you select Multiple Volumes, click Edit to open the Add Multiple Volumes dialog. For more information on the Add Multiple Volumes dialog, see Add Multiple Volumes.

6. Click Next.

7. Define the allocation parameters. Specify the following parameters:

   • CI Size
     Control size for the data and index components of the file

   • Unit
     Space allocation unit. Select one of the following options:

     • TRKS
       Tracks

     • CYL
       Cylinders

     • REC
       Records

     • K
       Kilobytes

     • M
       Megabytes

   • Primary
     Primary space allocation

   • Secondary
     Secondary space allocation

   • Key position
     Position of key for VSAM file

   • Key length
     Key length for VSAM file

   • Avg record size
     Average length of records

   • Max record size
     Length of largest record allowed

   • Owner ID
     ID of owner associated with file

   • Percent free CI and CA
     Amount of empty space allocated in each control interval when file is initially loaded

   • Share options crossregion
     Specifies how the file can be shared among regions using Global Resource Serialization. Select one of the following options:

     • 1
       Unlimited read OR one read/write

     • 2
       Unlimited read AND one read/write

     • 3
       Shared fully

     • 4
       Shared fully and updated/refreshed immediately

   • Share options crosssystem
     Specifies how the file can be shared among systems using Global Resource Serialization. Select one of the following options:

     • 3
       Shared fully

     • 4
       Shared fully and updated/refreshed immediately

   • Buffer Space
     Minimum buffer space allocated when file is accessed

8. Click Finish.