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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--
Didi