... VxFS¹

VxFS is a journalling file system from Veritas Software.
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... WAFL²

Write Any-where File Layout(WAFL) is a file system from NetApp.
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... garbage³

In LFS garbage collection is done by a process, allowing the 
log to wrap around.
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... broadcast⁴

Message sent to each and every node in a group of cluster,
which has registered for certain service, like snapshot service.
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