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Viewing EVS Disk Monitoring Data

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Description

This section describes monitored metrics reported by EVS to Cloud Eye as well as their namespaces and dimensions. You can use the console or APIs provided by Cloud Eye to query the metrics of the monitored objects and alarms generated for EVS.

Namespace

SYS.EVS

Prerequisites

EVS disks have been attached to the servers.

Impact of Metrics on the System

If the detected bandwidth or IOPS of an EVS disk is high or exceeds the upper limit, no data will be lost. However, service read/write speeds will be affected, and I/O operations may even be blocked. In such cases, you are advised to switch to a disk type with higher specifications. For details, see Changing the EVS Disk Type.

Metrics

Table 1 EVS metrics

Metric ID

Metric Name

Description

Value Range

Unit

Conversion Rule

Dimension

Monitoring Period (Raw Data)

disk_device_read_bytes_rate

Disk Read Bandwidth

Number of bytes read from the monitored disk per second

≥ 0

bytes/s

1024 (IEC)

EVS disk

5 minutes (instantaneous value at the collection point)a

disk_device_write_bytes_rate

Disk Write Bandwidth

Number of bytes written to the monitored disk per second

≥ 0

bytes/s

1024 (IEC)

EVS disk

5 minutes (instantaneous value at the collection point)a

disk_device_read_requests_rate

Disk Read IOPS

Number of read requests sent to the monitored disk per second

≥ 0

requests/s

N/A

EVS disk

5 minutes (instantaneous value at the collection point)a

disk_device_write_requests_rate

Disk Write IOPS

Number of write requests sent to the monitored disk per second

≥ 0

requests/s

N/A

EVS disk

5 minutes (instantaneous value at the collection point)a

Note

a: Because metric collection precision has been improved, some regions now use a 1-minute collection period (based on the average value of the collection points). The actual collection interval takes precedence.

b: Because metric collection precision has been improved, some regions now use a 1-minute collection period (based on the Boolean value). The actual collection interval takes precedence.

Viewing Monitoring Metrics on the EVS Console

  1. Sign in to the console.
  2. Choose Storage > Elastic Volume Service.

    The Elastic Volume Service page is displayed.

  3. In the EVS disk list, click the name of the disk for which you want to view monitoring data.

    The disk details page is displayed.

  4. On the Servers tab, locate the row that contains the server and click View Metric in the Operation column.

    The Monitoring Metrics page is displayed.

  5. View the disk monitoring data by metric or monitored duration.

    For more information about Cloud Eye, see the Cloud Eye User Guide.

Dimension

Key

Value

disk_name

  • ECS ID-Drive letter, for example, 6f3c6f91-4b24-4e1b-b7d1-a94ac1cb011d-vda (vda is the drive letter). It is suitable for KVM ECSs.
  • ECS ID-volume-Disk ID, for example, 6f3c6f91-4b24-4e1b-b7d1-a94ac1cb011d-volume-31f45764-38b3-44ad-aaca-4015c83371e6

    Volume ID. It is suitable for QingTian ECSs.