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Advanced O&M Command Reference

OceanStor 2000, 5000, and 6000 V3 Series V300R006

This document is applicable to OceanStor 2200 V3, 2600 V3 Video Surveillance Edition, 2600 V3, 5300 V3, 5500 V3, 5600 V3, 5800 V3, and 6800 V3. Based on the CLI, this document describes how to use various commands classified by functionsand how to set the CLI and manage the storage system through these commands. The document that you browse online matches the latest C version of the product. Click Download to download documents of other C versions.
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change noma rtt_jitter

change noma rtt_jitter

Function

The change noma rtt_jitter command is used to change values of NOMA algorithm parameters.

Format

change noma rtt_jitter { lower=? | upper=? | base_rtt_update_peroids=? | debug_switch=? | init_switch=? | log_switch=? | policy_nono_congestion=? | policy_congestion=? | controller_add_step_unblock=? | update_policy_threshold=? | controller_add_step=? | controller_original_policy=? | threshold_original_policy=? | update_policy_congestion=? | update_policy_parameter1=? | modify_peroids_switch=? | modify_peroids=? | threshold_add_step=? | base_rtt_update_switch=? } *

Parameters

Parameter

Description

Value

lower=?

Lower limit of delay variation.The default value is 20.

The value ranges from 1 to 2147483647.

upper=?

Upper limit of delay variation.The default value is 80.

The value ranges from 1 to 2147483647.

base_rtt_update_peroids=?

Interval between two times of BASE_RTT update. The default value is 60 (unit: s).

The value ranges from 1 to 4294967295.

init_switch=?

Switch that configures whether to initialize the NOMA algorithm when the CA_EVENT_TX_START event occurs. The default value on.

The value can be set to on or off.

debug_switch=?

Configure whether to switch on the debug mode. The default value is off.

The value can be set to on or off.

log_switch=?

Switch that configures whether to log the NOMA algorithm when the CA_EVENT_TX_START event occurs. The default value is off.

The value can be set to on or off.

policy_nono_congestion=?

Set the policy on updating the slow start threshold and that on increasing the congestion window when the CA_EVENT_COMPLETE_CWR event is being processed and congestion does not occur. The default value is 1.

The value ranges from 0 to 1.

policy_congestion=?

Set the policy on updating the slow start threshold and that on increasing the congestion window when the CA_EVENT_COMPLETE_CWR event is being processed and congestion occurs. The default value is 1.

The value ranges from 0 to 2.

controller_add_step_unblock=?

Set the steps by which the congestion window is increased during fake congestion. The default value is 10.

The value ranges from 0 to 4294967295.

update_policy_threshold=?

Set the update policy for the threshold of slow start during congestion. The default value is 1.

The value ranges from 0 to 1.

controller_add_step=?

Set the steps by which the congestion window is increased when congestion ceases or the TCP connection state transits. The default value is 10.

The value ranges from 0 to 4294967295.

controller_original_policy=?

Set the initialization policy for the congestion window during link initialization. The default value is 0.

The value ranges from 0 to 1.

threshold_original_policy=?

Set the initialization policy for the threshold of slow start during link initialization. The default value is 0.

The value ranges from 0 to 1.

update_policy_congestion=?

Set the update policies for the congestion window and the threshold of slow start when the TCP connection state is restored to OPEN from another state. The default value is 1.

The value ranges from 1 to 4294967295.

update_policy_parameter=?

During fake congestion, adjust the congestion window and the threshold of slow start according to the adjustment policies. The default value is 200.

The value ranges from 0 to 4294967295.

modify_peroids_switch=?

Switch that configures whether to change the bandwidth estimation period. The default value is off.

The value can be set to on or off.

modify_peroids=?

Bandwidth estimation period. The default value is 25 (unit: jiffy).

The value ranges from 0 to 4294967295.

threshold_add_step=?

Set the steps by which the threshold of slow start is increased during congestion. The default value is 0.

The value ranges from 0 to 4294967295.

base_rtt_update_switch=?

Switch that configures whether to update BASE_RTT. The default value is off.

The value can be set to on or off.

Views

Developer view

Usage Guidelines

  • This command must be used under the guidance of R&D personnel.
  • This command may cause the disconnection of services on the link that uses the NOMA algorithm.
  • This command may cause performance fluctuation.
  • The recommended ranges for the upper and lower limit of RTT delay variation are both from 10 to 100.
  • OceanStor 6800 V3/5300 V3/5500 V3/5600 V3/5800 V3 storage systems support this command.

Example

Set parameters of the NOMA algorithm.

developer:/>change noma rtt_jitter lower=20 
WARNING: You are about to modify the NOMA algorithm parameters. This operation may cause the disconnection of services on the link that has used the NOMA algorithm and cause performance fluctuation. 
Suggestion: Before performing this operation, confirm that multiple links are normally connected.  
Have you read warning message carefully?(y/n)y 
Are you sure you really want to perform the operation?(y/n)y 
Command executed successfully.

System Response

None

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Updated: 2019-03-30

Document ID: EDOC1000138402

Views: 449646

Downloads: 644

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