I don’t have live access to current news right now. Based on the latest information I can recall, WAFL (Write Anywhere File Layout) is NetApp’s proprietary file system used in ONTAP for managing in-storage metadata, snapshots, and efficient writes, with mechanisms like redirect-on-write for snapshots. However, I can’t verify the very latest news without checking up-to-date sources.
If you’d like, I can search for the most recent articles and patents about WAFL and summarize them with citations. Would you like me to do that?
Sources
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mystory.todayThe Write Anywhere File Layout (WAFL) is a proprietary file system 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
wikimili.comA file system layout apportions an underlying physical volume into one or more virtual volumes (vvols) of a storage system. The underlying physical vo
www.cnblogs.comThe present invention provides a method for keeping a file system in a consistent state and for creating read-only copies of a file system. Changes to the file system are tightly controlled. The file system progresses from one self-consistent state to another self-consistent state. The set of self-consistent blocks on disk that is rooted by the root inode is referred to as a consistency point. To implement consistency points, new data is written to unallocated blocks on disk. A new consistency...
patents.google.comA file system layout apportions an underlying physical volume into one or more virtual volumes (vvols) of a storage system. The underlying physical volume is an aggregate comprising one or more groups of disks, such as RAID groups, of the storage system. The aggregate has its own physical volume block number (pvbn) space and maintains metadata, such as block allocation structures, within that pvbn space. Each vvol has its own virtual volume block number (vvbn) space and maintains metadata,...
patents.google.com