On Thu, Dec 19, 2024 at 09:12:48AM -0800, Bart Van Assche wrote: > Using zone append operations defeats two of the advantages of zoned > storage. One of the advantages of zoned storage is that filesystems have > control over the layout of files on flash memory with regular writes. I'm not sure what you mean, but not they absolutely do not. The FTL will reorder in any way it fits. With zones it will genrally do less so (at least for sensible implementations), but that does not depend on using write or zone append. > That advantage is lost when using zone append operations because it is > allowed to reorder these operations. It is allowed but doesn't do in practice. It will reorder in exactly the case where your scheme doesn't work at all. > Another advantage that is lost is > the reduction in size of the FTL translation table. When using zone > append operations, the filesystem has to store the offsets returned by > zone append operations somewhere. With regular writes this is not > necessary. The file system always has to track the extents. Bart, I'm not sure where you get the lines your spewing here from, but they are completely decouple from technical reality. Please spend some time actually understanding the technologies you make claims about.
