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Disk throughput and latency metrics

Availability: This command is available to cluster administrators at the advanced privilege level.

Description

This command continuously displays performance data for disks at a regular interval. The command output displays data in the following columns:

  • Disk - disk name.

  • Node - node name.

  • Busy (%) - percentage of time there was at least one outstanding request to the disk.

  • Total Ops - total operations per second.

  • Read Ops - read operations per second.

  • Write Ops - write operations per second.

Parameters

[-disk <text>] - Disk (privilege: advanced)

Selects the disk for which you want to display performance data.

[-node {<nodename>|local}] - Node (privilege: advanced)

Selects the node for which you want to display performance data.

[-sort-key <text>] - Column to Sort By (privilege: advanced)

If this parameter is specified, the command displays statistics sorted by the specified column.

-interval <integer> - Interval (privilege: advanced)

Specifies, in seconds, the interval between statistics updates. The default setting is 5 seconds.

-iterations <integer> - Iterations (privilege: advanced)

Specifies the number of iterations the command runs before terminating. The default setting is 1. If the number is 0 (zero), the command continues to run until you interrupt it by pressing Ctrl-C.

-max <integer> - Maximum Number of Instances (privilege: advanced)

Specifies the maximum number of disks to display. The default setting is 25.

Examples

The following example displays disk statistics:

cluster1::> statistics disk show
cluster1 : 12/31/1969 16:00:04

                   Busy *Total Read Write
 Disk         Node  (%)    Ops  Ops   Ops
 -------- -------- ---- ------ ---- -----
 VMw-1.31    node2    0      2    2     0
 VMw-1.30    node2    0      3    0     3
 VMw-1.3     node1    0      0    0     0
 VMw-1.29    node2    0      1    0     1

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