On Wed, Jun 13, 2018 at 8:45 AM, Hari Prasanth Loganathan
<hariprasanth.l@msystechnologies.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 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/disk/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/f78c8adf-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-0de3d844652e/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/f78c8adf-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-0de3d844652e/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
>> >
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>> >
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>> >
>>
>>
>>
>> --
>> Didi
>
>

--
Didi