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ProVersion
sauber edited this page Jan 21, 2012
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Should ABFS reach a state where it can be offered for sale, these value adding features can be added.
Each Inode can have a layout option for how to assemble files from blocks. Default is a straight-forward raid0( concat) of blocks. more advanced options can be raid1 (mirror), raid5(parity), raid6(2 parity blocks). Layout option can be applied to dirs and recursively applied to subdirs and files.
Normally ABFS deletes least recently accessed blocks when more space is needed for new blocks. Obviously files will disappear this way. It can be made optional to preserve blocks that are in use by files by keeping a block reference database. All blocks that are referred by inodes are not to be deleted.