try 4MB that is the default not? > -----Original Message----- > Sent: 10 February 2021 09:30 > To: ceph-users <ceph-users@xxxxxxx>; dev <dev@xxxxxxx>; ceph-qa@xxxxxxx > Subject: struggling to achieve high bandwidth on Ceph dev > cluster - HELP > > Hi, > > Hello I am using rados bench tool. Currently I am using this tool on > the > development cluster after running vstart.sh script. It is working fine > and > I am interested in benchmarking the cluster. However I am struggling to > achieve a good bandwidth i.e. bandwidth (MB/sec). My target throughput > is > at least 50 MB/sec and more. But mostly I am achieving is around 15-20 > MB/sec. So, very poor. > > I am quite sure I am missing something. Either I have to change my > cluster > through vstart.sh script or I am not fully utilizing the rados bench > tool. > Or may be both. i.e. not the right cluster and also not using the rados > bench tool correctly. > > Some of the shell examples I have been using to build the cluster are > bellow: > MDS=0 RGW=1 ../src/vstart.sh -d -l -n --bluestore > MDS=0 RGW=1 MON=1 OSD=4../src/vstart.sh -d -l -n --bluestore > > While using rados bench tool I have been trying with different block > sizes > 4K, 8K, 16K, 32K, 64K, 128K, 256K, 512K. And I have also been changing > the > -t parameter in the shell to increase concurrent IOs. > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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