Published at LXer:
One might well think that, at this point, there has been sufficient discussion of the design decisions built into the ext4 "delayed allocation" feature and the user-space implications of those decisions. And perhaps that is true, but there should be room for a summary of the relevant issues. The key question has little to do with the details of filesystem design, and a lot to do with the kind of API that the Linux kernel should present to its user-space processes.
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