WRITE ANYWHERE FILE LAYOUT
LAMBERT M. SURHONE, MARIAM T. TENNOE, SUSAN F. HENSSONOW
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The Write Anywhere File Layout (WAFL) is a file layout that supports large, high-performance RAID arrays, quick restarts without lengthy consistency checks in the event of a crash or power failure, and growing the filesystems size quickly.
It was designed by NetApp for use in its storage appliances.
WAFL is not a file system.
WAFL provides mechanisms that enable a variety of file systems and technologies that want to access disk blocks.