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16.4. Sub-Collections
16.4.1. Statistics Sub-Collection
Each floating disk exposes a
statistics sub-collection for disk-specific statistics. Each statistic contains the following elements:
| Element | Type | Description |
|---|---|---|
name | string | The unique identifier for the statistic entry. |
description | string | A plain text description of the statistic. |
unit | string | The unit or rate to measure the statistical values. |
type | One of GAUGE or COUNTER | The type of statistic measures. |
values type= | One of INTEGER or DECIMAL | The data type for the statistical values that follow. |
value | complex | A data set that contains datum. |
datum | see values type | An individual piece of data from a value. |
disk id= | relationship | A relationship to the containing disk resource. |
The following table lists the statistic types for floating disks.
|
Name
|
Description
|
|---|---|
data.current.read |
The data transfer rate in bytes per second when reading from the disk.
|
data.current.write |
The data transfer rate in bytes per second when writing to the disk.
|
Example 16.3. An XML representation of a virtual machine's statistics sub-collection
<statistics>
<statistic id="33b9212b-f9cb-3fd0-b364-248fb61e1272"
href="/ovirt-engine/api/disks/f28ec14c-fc85-43e1-818d-96b49d50e27b/statistics/
33b9212b-f9cb-3fd0-b364-248fb61e1272">
<name>data.current.read</name>
<description>Read data rate</description>
<values type="DECIMAL">
<value>
<datum>0</datum>
</value>
</values>
<type>GAUGE</type>
<unit>BYTES_PER_SECOND</unit>
<disk id="f28ec14c-fc85-43e1-818d-96b49d50e27b"
href="/ovirt-engine/api/disks/f28ec14c-fc85-43e1-818d-96b49d50e27b"/>
</statistic>
...
</statistics>
Note
This
statistics sub-collection is read-only.
