random read generates zero filled file

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Hi,

I'm trying out FIO, and rand a random read job with a 12GB file.
It seems that the "Laying out IO file(s) " process generates a zero-filled file. This means that when compression is activated (on ZFS), no reads actually happens.

I tried adding a "buffer_compress_percentage=10" section to tell generated data should compress from only "10%" but this seems to apply only to actual benchmark job, not the 'laying out file's.

Am I missing something?

Thanks

Michel

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