On Tue, Jul 17, 2018 at 3:27 PM, Hari Prasanth Loganathan <hariprasanth.l@msystechnologies.com> wrote:

Hi Team,

We are using the following API to collect the disk statistics,

https://X.X.X.2/ovirt-engine/api/disks/2331bad7-71ec-4fad-95bb-2b3449f3dbda/statistics

I found one issue in the disk statistics. In case If the Virtual Machine has this disk (2331bad7-71ec-4fad-95bb-2b3449f3dbda) attached to it and I perform some read / write operation in the VM and it increases the corresponding disk level Read data rate / Write data rate / disk.read.latency / disk.write.latency.

Example, I received the following values for this disk, But the problem is even when I bring down the VM still the last known value is received continuously. Is it a known issue Or any workaround is available?

Expected : All values should go to Zero
Actual : All values retains the last known values when the VM was in UP state.

{
    "statistic": [
        {
            "kind": "gauge",
            "type": "decimal",
            "unit": "bytes_per_second",
            "values": {
                "value": [
                    {
                        "datum": 2184
                    }
                ]
            },
            "disk": {
                "href": "/ovirt-engine/api/disks/2331bad7-71ec-4fad-95bb-2b3449f3dbda",
                "id": "2331bad7-71ec-4fad-95bb-2b3449f3dbda"
            },
            "name": "data.current.read",
            "description": "Read data rate",
            "href": "/ovirt-engine/api/disks/2331bad7-71ec-4fad-95bb-2b3449f3dbda/statistics/33b9212b-f9cb-3fd0-b364-248fb61e1272",
            "id": "33b9212b-f9cb-3fd0-b364-248fb61e1272"
        },
        {
            "kind": "gauge",
            "type": "decimal",
            "unit": "bytes_per_second",
            "values": {
                "value": [
                    {
                        "datum": 41202005
                    }
                ]
            },
            "disk": {
                "href": "/ovirt-engine/api/disks/2331bad7-71ec-4fad-95bb-2b3449f3dbda",
                "id": "2331bad7-71ec-4fad-95bb-2b3449f3dbda"
            },
            "name": "data.current.write",
            "description": "Write data rate",
            "href": "/ovirt-engine/api/disks/2331bad7-71ec-4fad-95bb-2b3449f3dbda/statistics/2f23addd-4ebd-3d82-a449-c28778bc33eb",
            "id": "2f23addd-4ebd-3d82-a449-c28778bc33eb"
        },
        {
            "kind": "gauge",
            "type": "decimal",
            "unit": "seconds",
            "values": {
                "value": [
                    {
                        "datum": 0.12
                    }
                ]
            },
            "disk": {
                "href": "/ovirt-engine/api/disks/2331bad7-71ec-4fad-95bb-2b3449f3dbda",
                "id": "2331bad7-71ec-4fad-95bb-2b3449f3dbda"
            },
            "name": "disk.read.latency",
            "description": "Read latency",
            "href": "/ovirt-engine/api/disks/2331bad7-71ec-4fad-95bb-2b3449f3dbda/statistics/3a7b3f72-d035-3bb9-b196-e86a4eb34993",
            "id": "3a7b3f72-d035-3bb9-b196-e86a4eb34993"
        },
        {
            "kind": "gauge",
            "type": "decimal",
            "unit": "seconds",
            "values": {
                "value": [
                    {
                        "datum": 1.4
                    }
                ]
            },
            "disk": {
                "href": "/ovirt-engine/api/disks/2331bad7-71ec-4fad-95bb-2b3449f3dbda",
                "id": "2331bad7-71ec-4fad-95bb-2b3449f3dbda"
            },
            "name": "disk.write.latency",
            "description": "Write latency",
            "href": "/ovirt-engine/api/disks/2331bad7-71ec-4fad-95bb-2b3449f3dbda/statistics/b1e75c7b-cea4-37d2-8459-f7d68efc69a3",
            "id": "b1e75c7b-cea4-37d2-8459-f7d68efc69a3"
        },
        {
            "kind": "gauge",
            "type": "decimal",
            "unit": "seconds",
            "values": {
                "value": [
                    {
                        "datum": 0
                    }
                ]
            },
            "disk": {
                "href": "/ovirt-engine/api/disks/2331bad7-71ec-4fad-95bb-2b3449f3dbda",
                "id": "2331bad7-71ec-4fad-95bb-2b3449f3dbda"
            },
            "name": "disk.flush.latency",
            "description": "Flush latency",
            "href": "/ovirt-engine/api/disks/2331bad7-71ec-4fad-95bb-2b3449f3dbda/statistics/9c17ad7b-9ef1-3e8d-ad0a-ff8bee3925f0",
            "id": "9c17ad7b-9ef1-3e8d-ad0a-ff8bee3925f0"
        }
    ]
}

Thanks,
Hari

This email message, contents and its attachments may contain confidential, proprietary or legally privileged information and is intended solely for the use of the individual or entity to whom it is actually intended. If you have erroneously received this message, please permanently delete it immediately and notify the sender. If you are not the intended recipient of the email message,you are notified strictly not to disseminate,distribute or copy this e-mail.E-mail transmission cannot be guaranteed to be secure or error-free as Information could be intercepted, corrupted, lost, destroyed, incomplete or contain viruses and MSysTechnologies LLC accepts no liability for the contents and integrity of this mail or for any damage caused by the limitations of the e-mail transmission.