Thank you it worked with both access patterns and blocksizes!
On 18/07/18 19:44, Jeff Furlong wrote:
I'm using FIO for testing some distributed file systems and I am interested in running a single test where I have a mix of both reading and writing. The problem is that I want to have different access patterns (e.g. sequential writing and random reading) and different block sizes. How can I run such a job?
I recently went through a similar exercise. Several options allow for read/write/trim settings to be unique. For example, consider setting the percentage_random to 100 for reads and 0 for writes:
fio --name=rr_sw --ioengine=libaio --direct=1 --rw=randrw --norandommap --randrepeat=0 --filename=/dev/nvme0n1 --runtime=10s --time_based --percentage_random=100,0
You can use the same concept for blocksize and invoke rwmixread to further control the amount of reads/writes.
Regards,
Jeff
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