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axboe / fio

Flexible I/O Tester
GNU General Public License v2.0
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in 3.36, randwrite in zbd zonemode can only write to 128 zones which lead to high iops in randwrite #1717

Open pilife opened 9 months ago

pilife commented 9 months ago

Please acknowledge the following before creating a ticket

Description of the bug: in 3.36, randwrite in zbd zonemode can only write to 128 zones which lead to high iops in randwrite

Environment: 5.10.134-13.an8.x86_64

fio version: 3.36

Reproduction steps

fio --name=zbc --filename=/dev/sdr --direct=1 --zonemode=zbd --offset=969z --numjobs=4 --group_reporting=1 --runtime=30 --ioengine=libaio --iodepth=4 --rw=randwrite --bs=256K

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pilife commented 9 months ago

by using zbc_report_zones command, it turns out that there are only 128 implicit open zones were written