Disk space requirements on z/OS

The WebSphere Event Broker for z/OS installation uses approximately 400 MB of disk space; you should plan on using 500 MB which will also allow for new service to be applied and also for the component directories.

When you apply service, if you do not replace your existing install (for example you apply the new fix pack level alongside your existing install) then you need to plan the same amount of disk space for the higher service level libraries.

If you are transferring the files using tar to package them, you need approximately 200 MB of space for the .tar file.

You can check how much space is used and how much is free in a file system using the OMVS command:
 df -P /pathname
100 MB is 3 276 800 512 byte sectors.
The following table gives guidance on the space required for a minimum installation (base installation and verification test) of WebSphere Event Broker for z/OS components.
Component Space required Purpose
DB2 database (broker only) 6 MB Holds the broker system tables.
Component directory 20 MB Holds the runtime information and output directories for the component.

This includes trace files and other user problem determination data, which can become large.

Component PDSE 1 MB Holds the customization and administration jobs, procedures, and data for the component.

The data set must be allocated with a fixed record length of 80 (LRECL=80) and a format of FB 80. Reserve directory space for 50 members, or use a PDSE if possible.

Started task user ID home directory 8 GB Collect diagnostic materials, for example dumps. Dumps are usually more than 500MB in size.

8 GB of space needs to be available in the file system, but many user IDs can have their home directory in the file system.

The Component directory and the Started task user ID home directory must be different to ensure that, when dumps are taken in the Started task user ID home directory, they do not cause problems with the runtime broker that still needs to write to the Component directory.

Related tasks
Using the file system on z/OS