Re: [ovirt-users] Ovirt with bad IO performance

Hi Nir, thanks for the answer *The nfs server is in the host?* Yes, i choose NFS to use as storage on ovirt host *- Is this 2.9GiB/s or 2.9 MiB/s?* Is MiB/s, i put the full test on paste bin centos guest on ovirt: http://pastebin.com/d48qfvuf centos guest on xenserver: http://pastebin.com/gqN3du29 how the test works: https://www.howtoforge.com/how-to-benchmark-your-system- cpu-file-io-mysql-with-sysbench *- Are you testing using NFS in all versions?* i am using the v3 version *- What is the disk format?* partion size format / 20Gb xfs swap 2 Gb xfs /dados rest of disk xfs (note, this is the partition where i save the ISOs,exports and VM disks) *- How do you test io on the host?* I do a clean install of centos and do the test before i install the ovirt the test: http://pastebin.com/7RKU7778 *- What kind of nic is used? (1G, 10G?)* Is only a 100mbps :(

*We need much more details to understand what do you test here.* I have problems to upload the benchmark test on orvirt to novabench site, so here is the screenshot(i make a mistake on the last email i get the wrong value), is 86 Mb/s:

​ And the novabench on xenserver: https://novabench.com/compare.php?id=ba8dd628e4042dfc1f3d39670b164a b11061671 *- For Xenserver - detailed description of the vm and the storage configuration?* The host is the same(i install xenserver, do the tests before i install centos), the VM i use the same configuration of ovirt, 2 cores, 4 Gb of ram and 60 Gb disk(in the default xenserver SR) *- For ovirt, can you share the vm command line, available in /var/log/libvirt/qemu/vmname.**log?* 2016-09-01 12:50:28.268+0000: starting up libvirt version: 1.2.17, package: 13.el7_2.5 (CentOS BuildSystem <http://bugs.centos.org>;, 2016-06-23-14:23:27, worker1.bsys.centos.org), qemu version: 2.3.0 (qemu-kvm-ev-2.3.0-31.el7.16.1) LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin QEMU_AUDIO_DRV=none /usr/libexec/qemu-kvm -name vmcentos -S -machine pc-i440fx-rhel7.2.0,accel=kvm,usb=off -cpu Haswell-noTSX -m size=4194304k,slots=16,maxmem=4294967296k -realtime mlock=off -smp 2,maxcpus=16,sockets=16,cores=1,threads=1 -numa node,nodeid=0,cpus=0-1,mem=4096 -uuid 21872e4b-7699-4502-b1ef-2c058eff1c3c -smbios type=1,manufacturer=oVirt,product=oVirt Node,version=7-2.1511.el7. centos.2.10,serial=03AA02FC-0414-05F8-D906-710700080009, uuid=21872e4b-7699-4502-b1ef-2c058eff1c3c -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain- vmcentos/monitor.sock,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=2016-09-01T09:50:28,driftfix=slew -global kvm-pit.lost_tick_policy=discard -no-hpet -no-shutdown -boot strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x3 -device virtio-serial-pci,id=virtio-serial0,max_ports=16,bus=pci.0,addr=0x4 -drive file=/rhev/data-center/mnt/ovirt.kemi.intranet:_dados_ iso/52ee9f87-9d38-48ec-8003-193262f81994/images/11111111- 1111-1111-1111-111111111111/CentOS-7-x86_64-NetInstall- 1511.iso,if=none,id=drive-ide0-1-0,readonly=on,format=raw -device ide-cd,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0,bootindex=2 -drive file=/rhev/data-center/00000001-0001-0001-0001- 0000000002bb/4ccdd1f3-ee79-4425-b6ed-5774643003fa/images/ 2ecfcf18-ae84-4e73-922f-28b9cda9e6e1/800f05bf-23f7- 4c9d-8c1d-b2503592875f,if=none,id=drive-virtio-disk0, format=raw,serial=2ecfcf18-ae84-4e73-922f-28b9cda9e6e1, cache=none,werror=stop,rerror=stop,aio=threads -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x6,drive=drive- virtio-disk0,id=virtio-disk0,bootindex=1 -chardev socket,id=charchannel0,path=/var/lib/libvirt/qemu/channels/ 21872e4b-7699-4502-b1ef-2c058eff1c3c.com.redhat.rhevm.vdsm,server,nowait -device virtserialport,bus=virtio-serial0.0,nr=1,chardev= charchannel0,id=channel0,name=com.redhat.rhevm.vdsm -chardev socket,id=charchannel1,path=/var/lib/libvirt/qemu/channels/ 21872e4b-7699-4502-b1ef-2c058eff1c3c.org.qemu.guest_agent.0,server,nowait -device virtserialport,bus=virtio-serial0.0,nr=2,chardev= charchannel1,id=channel1,name=org.qemu.guest_agent.0 -device usb-tablet,id=input0 -vnc 192.168.0.189:0,password -k pt-br -device VGA,id=video0,vgamem_mb=16,bus=pci.0,addr=0x2 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 -msg timestamp=on 2016-09-01T12:50:28.307173Z qemu-kvm: warning: CPU(s) not present in any NUMA nodes: 2 3 4 5 6 7 8 9 10 11 12 13 14 15 2016-09-01T12:50:28.307371Z qemu-kvm: warning: All CPU(s) up to maxcpus should be described in NUMA config qemu: terminating on signal 15 from pid 1 2016-09-01 19:13:47.899+0000: shutting down Thanks 2016-09-02 11:05 GMT-03:00 Nir Soffer <nsoffer(a)redhat.com&gt;: > On Fri, Sep 2, 2016 at 4:44 PM, Gabriel Ozaki <gabriel.ozaki(a)kemi.com.br&gt; > wrote: > >> Hi >> i am trying Ovirt 4.0 and i am getting some strange results when >> comparing with Xenserver >> >> **The host machine* >> Intel Core i5-4440 3.10GHz running at 3093 MHz >> 8 Gb of RAM (1x8) >> 500 Gb of Disk (seagate st500dm002 7200rpm) >> CentOS 7 (netinstall for the most updated and stable packages) >> >> >> >> **How i am testing:* >> I choose two benchmark tools, sysbench(epel-repo on centos) and >> novabench(for windows guest, https://novabench.com ), then i make a >> clean install of xenserver and create two guests(CentOS and Windows 7 SP1) >> >> >> **The Guest specs* >> 2 cores >> 4 Gb of RAM >> 60 Gb of disk (using virtIO in a NFS storage) >> > > The nfs server is in the host? > > >> Important note: only the testing guest are up on benchmark and i have >> installed the drivers in guest >> >> >> **The Sysbench disk test(creates 10Gb of data and do the bench):* >> # sysbench --test=fileio --file-total-size=10G prepare >> # sysbench --test=fileio --file-total-size=10G --file-test-mode=rndrw >> --init-rng=on --max-time=300 --max-requests=0 run >> >> Host result: 2.9843Mb/sec >> Ovirt result: 1.1561Mb/sec >> Xenserver result: 2.9006Mb/sec >> > > - Is this 2.9GiB/s or 2.9 MiB/s? > - Are you testing using NFS in all versions? > - What is the disk format? > - How do you test io on the host? > - What kind of nic is used? (1G, 10G?) > > >> >> **The novabench test:* >> Ovirt result: 79Mb/s >> Xenserver result: 101Mb/s >> > > We need much more details to understand what do you test here. > > - For ovirt, can you share the vm command line, available in > /var/log/libvirt/qemu/vmname.log? > - For Xenserver - detailed description of the vm and the storage > configuration? > > Nir > _______________________________________________ Users mailing list Users(a)ovirt.org http://lists.ovirt.org/mailman/listinfo/users