Hello, I'm trying to benchmark *correctly* my lab setup. Pretty simple : 2 proxmox nodes setup, protocol C, ZFS RAID1 HDDs backend with mirror log and cache on SSDs. DRBD9, 10Gbps Ethernet network, tuned latency by reading a lot of papers on this.
What I'm trying : run fio with below parameters on 2 VMs running on hypervisor A and two nodes running on hypervisor 2. VMs are really simple Ubuntu 17.10 with 5G disks. fio command line : fio --filename=/tmp/test.dat --size=1G --direct=1 --rw=randrw --rwmixwrite=30 --refill_buffers --norandommap --randrepeat=0 --ioengine=libaio --bs=128k --iodepth=16 --numjobs=1 --time_based --runtime=600 --group_reporting --name=benchtest Which means : 1G test file, read 70%, write 30%, block size 128k, iodepth 16. I'm not really sure about others parameters. My final goal is to get a clue of how many VMs I will be able to run on those hypervisors with a typical workload on ~500kB/s write and ~2MB/s read. What would be *really* cool : ability to instanciate a bunch of VMs running this workload and see when the hypervisors overload. Even cooler : dynamic workload with threshold (500kB/s at a time and +/-10% randomness one minute later). Does anyone have an example of such code piece ? How to you benchmark your disks for 'real life' workload ? Thank you ! Julien _______________________________________________ drbd-user mailing list [email protected] http://lists.linbit.com/mailman/listinfo/drbd-user
