On Wed, Jun 13, 2018 at 10:43 AM, Hari Prasanth Loganathan < hariprasanth.l@msystechnologies.com> wrote:
Hi Yedidyah,
I tried the read also, same result 0,
You keep reading virtual devices that read only from the kernel/memory... Please try reading from your disk. It's likely /dev/sda, or you can check using e.g. 'df /', 'lsblk', etc. And please check with vmstat/iostat that you see the reads. If you don't, try until you do. Only then check what oVirt has to say. Best regards,
On Wed, Jun 13, 2018 at 12:54 PM, Yedidyah Bar David <didi@redhat.com> wrote:
On Wed, Jun 13, 2018 at 9:53 AM, Hari Prasanth Loganathan < hariprasanth.l@msystechnologies.com> wrote:
Hi Yedidyah,
*I tried running the 'dd if=/dev/zero of=/root/hari/test' and I received the following output in VM oVirt console and meanwhile I checked this API https://172.30.60.42/ovirt-engine/api/disks/f78c8adf-23f9-4f52-a29b-0de3d844... <https://172.30.60.42/ovirt-engine/api/disks/f78c8adf-23f9-4f52-a29b-0de3d844652e/statistics> and the value is received as '0' always *
*where, * * f78c8adf-23f9-4f52-a29b-0de3d844652e - disk ID attached to that VM*
*Anything wrong? *
You only wrote 300 MB, are you sure it was enough to cause an actual write (and not cached)?
Did you check vmstat/iostat?
Perhaps try reading instead of writing.
dd if=/dev/somedev of=/dev/null
*Thanks,*
*Hari *
On Wed, Jun 13, 2018 at 11:56 AM, Yedidyah Bar David <didi@redhat.com> wrote:
Hi Yedidyah,
Thanks for your response. I also tried creating the file, writing some content to the VM guest console. Still, I didn't see any increase in
On Wed, Jun 13, 2018 at 8:45 AM, Hari Prasanth Loganathan <hariprasanth.l@msystechnologies.com> wrote: the
values, It is always 0.
Not sure I understand. "Creating the file" - which one?
Perhaps try something like:
dd if=/dev/zero of=/root/myfile1
In any case, please test that the OS sees your IO. Use e.g. vmstat, iostat or something like that. oVirt (and metrics) will only show what the OS reports - if you see there '0', that's what you should get in metrics.
Best regards,
On Wed, Jun 13, 2018 at 10:58 AM, Yedidyah Bar David <didi@redhat.com
wrote:
On Tue, Jun 12, 2018 at 1:24 PM, Hari Prasanth Loganathan <hariprasanth.l@msystechnologies.com> wrote: > Hi Team, > > I use the following API to get the disk statistics as per the
oVirt rest
> API > documentation. > > > http://ovirt.github.io/ovirt-engine-api-model/4.2/#types/dis k/links/statistics > > > > https://172.30.X.X/ovirt-engine/api/disks/f78c8adf-23f9-4f52 -a29b-0de3d844652e/statistics > > > { > "statistic": [ > { > "kind": "gauge", > "type": "decimal", > "unit": "bytes_per_second", > "values": { > "value": [ > { > "datum": 0 > } > ] > }, > "disk": { > "href": "/ovirt-engine/api/disks/f78c8 adf-23f9-4f52-a29b-0de3d844652e", > "id": "f78c8adf-23f9-4f52-a29b-0de3d844652e" > }, > "name": "data.current.read", > "description": "Read data rate", > "href": > > "/ovirt-engine/api/disks/f78c8adf-23f9-4f52-a29b-0de3d844652 e/statistics/33b9212b-f9cb-3fd0-b364-248fb61e1272", > "id": "33b9212b-f9cb-3fd0-b364-248fb61e1272" > }, > { > "kind": "gauge", > "type": "decimal", > "unit": "bytes_per_second", > "values": { > "value": [ > { > "datum": 0 > } > ] > }, > "disk": { > "href": "/ovirt-engine/api/disks/f78c8 adf-23f9-4f52-a29b-0de3d844652e", > "id": "f78c8adf-23f9-4f52-a29b-0de3d844652e" > }, > "name": "data.current.write", > "description": "Write data rate", > "href": > > "/ovirt-engine/api/disks/f78c8adf-23f9-4f52-a29b-0de3d844652 e/statistics/2f23addd-4ebd-3d82-a449-c28778bc33eb", > "id": "2f23addd-4ebd-3d82-a449-c28778bc33eb" > } > ] > } > > > Unfortunately, the values are always coming as '0'. > > Steps to reproduce : > > 1) I logged into the VM console and run the following command to copy > the > file and I see the write rate is 300mb/sec > > dd if=/dev/zero of=/dev/null
This command does not access the disk. Perhaps try to read or write to one, then check stats.
Best regards,
> > 2) During this time, I am trying to execute this API and receiving as 0 > always. > > Is this API useless? > > Thanks, > Hari > > _______________________________________________ > Users mailing list -- users@ovirt.org > To unsubscribe send an email to users-leave@ovirt.org > Privacy Statement: https://www.ovirt.org/site/privacy-policy/ > oVirt Code of Conduct: > https://www.ovirt.org/community/about/community-guidelines/ > List Archives: > > https://lists.ovirt.org/archives/list/users@ovirt.org/messag e/7TGIUQ2REOMSTJBGD3OPY5RE2KOSSFWM/ >
-- Didi
-- Didi
-- Didi
-- Didi
