Hi,
I set "dedupe_percentage " to let FIO generate some duplicated data. I also want read these data back and verify it.
But, there is no duplicated data after setting "verify" parameter.
checking the source code, I found that function do_io in file backend.c fill the buffer twice. the source code is as below.
do_io()
{
io_u = get_io_u(td);
.....
if (io_u->ddir == DDIR_WRITE && td->flags & TD_F_DO_VERIFY)
populate_verify_io_u(td, io_u);
}
In function get_io_u, the buffer is filled with data as the "dedupe_percentage " specified.
In function populate_verify_io_u, the buffer is refilled with random data. So, there would be no duplicated data.
Is this a bug?
