Hi,
we're playing around with ceph but are not quite happy with the IOs. 3 node ceph / proxmox cluster with each: LSI HBA 3008 controller 4 x MZILT960HAHQ/007 Samsung SSD Transport protocol: SAS (SPL-3) 40G fibre Intel 520 Network controller on Unifi Switch Ping roundtrip to partner node is 0.040ms average. Transport protocol: SAS (SPL-3) fio reports on a virtual machine with --randrepeat=1 --ioengine=libaio --direct=1 --gtod_reduce=1 --name=test --filename=test --bs=4k --iodepth=64 --size=4G --readwrite=randrw --rwmixread=75 on average 5000 iops / write on average 13000 iops / read We're expecting more. :( any ideas or is that all we can expect? money is not a problem for this test-bed, any ideas howto gain more IOS is greatly appreciated. Thank you. Stefan
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