Consider
the following circumstances when creating nested filesets:
You
cannot access a nested fileset if the metadata server
that is hosting the parent fileset is unavailable. In other words, if the
metadata server hosting a fileset is offline, any nested filesets, even if
hosted by a different metadata server, would also be offline.
A FlashCopy® image
is created at the individual fileset level and does not include any nested
filesets. You cannot make a FlashCopy image of a fileset and any nested
filesets in a single operation. This can be of concern if you are required
to have a consistent image of a fileset and its nested filesets. Making FlashCopy images
in multiple operations could lead to ordering or consistency issues.
To
detach a fileset, you must first detach all of its nested filesets.
It is not possible to revert to a FlashCopy image when nested filesets exist
within the fileset. You must manually detach the nested filesets before reverting
to the image. You can reattach the nested filesets after the fileset is reverted.
When creating nested filesets, attach them only directly to other filesets.
Do not attach filesets to client-created directories because a large-scale
restore will be more complex.