Hi, dbench throughput on xfs over hardware limit(6Gb/s=750MB/s). Is this a bug or some feature of performance optimization? Disk: TOSHIBA PX05SMQ040 This is a 12Gb/s SAS SSD disk, but connect to 6Gb/s SAS HBA, so it works with 6Gb/s. dbench -s -t 60 -D /xfs 32 #Throughput 884.406 MB/sec (sync open) dbench -s -t 60 -D /xfs 1 #Throughput 149.172 MB/sec (sync open) we test the same disk with ext4 filesystem, the throughput is very close to, but less than the hardware limit. dbench -s -t 60 -D /ext4 32 #Throughput 740.95 MB/sec (sync open) dbench -s -t 60 -D /ext4 1 #Throughput 124.67 MB/sec (sync open) linux kernel: 5.4.70, 5.9.0 Best Regards 王玉贵 2020/10/13 -------------------------------------- 北京京垓科技有限公司 王玉贵 wangyugui@xxxxxxxxxxxx 电话：+86-136-71123776
