Using LFSR

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Hi,

How is LFSR used?

When running the job file:

[global]
readwrite=randwrite
size=64k
bs=8192
random_generator=lfsr
[test_job]

fio returns:

"fio: failed allocating random map. If running a large number of jobs,
try the 'norandommap' option or set 'softrandommap'. Or give a larger
--alloc-size to fio."

I tried the recommendations in the message above to no avail. I also
tried other combinations of size, bs, and readwrite.

Thank you,
Juan
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