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Hi all, I plan on having about 100M files totaling about 8.5TiBytes. To see how ext3 would perform with large numbers of files I've written a test program which creates a configurable number of files into a configurable number of directories, reads from those files, lists them and then deletes them. Even up to 1M files ext3 seems to perform well and scale linearly; the time to execute

Is there a way to find the holes in sparse files, other than assuming contiguous blocks of zeroes are holes? Thanks, Sean