[ceph-users] Re: why performance difference between 'rados bench seq' and 'rados bench rand' quite significant

rep3datapool pg num is 512, Average number of PG replicas per OSD is 139 scrubs, balancer and pg autoscaler was disabled RAM is 128G, swap is 0 From: Anthony D'Atri Date: 2024-10-30 12:03 To: Louisa CC: ceph-users Subject: Re: [ceph-users] why performance difference between 'rados bench

[ceph-users] why performance difference between 'rados bench seq' and 'rados bench rand' quite significant

Hi all, We used 'rados bench' to test 4k object read and write operations. Our cluster is pacific, one node, 11 bluestore osd ,db and wal share the block device. Block device is HDD. 1. testing 4k write with command 'rados bench 120 write -t 16 -b 4K -p rep3datapool --run-name 4kreadwrite --n