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Using the Hierarchical File System on z/OS

This is part of the larger task of customizing your z/OS environment.

If you have more than one MVS image, consider how you will use the HFS file system. You can share files in an HFS across different members of a sysplex. The file system is mounted on one MVS image and requests to the file are routed to the owning system using XCF from systems which do not have it mounted.

Moving a broker or User Name Server from one image to another is straightforward and the files for each broker or User Name Server can be shared.

However, there is a performance overhead when using files shared between images in an HFS because the data flows through the Coupling Facility (this is true for trace and other diagnostic data).

Space requirements

For details of the disk space required, see Disk space requirements (z/OS).



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