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

Hi Yaniv Sorry guys, i don't explain well on my first mail, i notice a bad IO performance on *disk* benchmarks, the network are working really fine

2016-09-02 12:04 GMT-03:00 Yaniv Kaul <ykaul(a)redhat.com&gt;: > On Fri, Sep 2, 2016 at 5:33 PM, Gabriel Ozaki <gabriel.ozaki(a)kemi.com.br&gt; > wrote: > >> 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 :( >> > > 100Mbps will not get you more than several MB/s. 11MB/s on a very bright > day... > >> >> *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: >> > > Which is not possible on the wire. Unless it's VM to VM? And the storage > is local, which means it's the bandwidth of the physical disk itself? > Y. > > > >> >> ​ >> And the novabench on xenserver: >> https://novabench.com/compare.php?id=ba8dd628e4042dfc1f3d396 >> 70b164ab11061671 >> >> *- 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-0414-0 >> 5F8-D906-710700080009,uuid=21872e4b-7699-4502-b1ef-2c058eff1c3c >> -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/va >> r/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/52 >> ee9f87-9d38-48ec-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-virti >> o-disk0,id=virtio-disk0,bootindex=1 -chardev >> socket,id=charchannel0,path=/var/lib/libvirt/qemu/channels/2 >> 1872e4b-7699-4502-b1ef-2c058eff1c3c.com.redhat.rhevm.vdsm,server,nowait >> -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel >> 0,id=channel0,name=com.redhat.rhevm.vdsm -chardev >> socket,id=charchannel1,path=/var/lib/libvirt/qemu/channels/2 >> 1872e4b-7699-4502-b1ef-2c058eff1c3c.org.qemu.guest_agent.0,server,nowait >> -device virtserialport,bus=virtio-serial0.0,nr=2,chardev=charchannel >> 1,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 >> >> >