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Advanced O&M Command Reference

OceanStor 18000 V3 Series V300R006

This document is applicable to OceanStor 18500 V3 and 18800 V3. Based on the CLI, this document describes how to use various commands classified by functions and 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 cache prefetch

change cache prefetch

Function

The change cache prefetch command is used to set the prefetch parameter.

Format

change cache prefetch [ max_prefetch_length=? ] [ max_intel_prefetch_length=? ] [ min_intel_prefetch_length=? ] [ intel_prefetch_length_factor=? ]

Parameters

Parameter

Description

Value

max_prefetch_length=?

Max prefetch length.

The value ranges from 1 to 32768.

max_intel_prefetch_length=?

Max intel prefetch length, and the value must be greater than or equal to that of the min_intel_prefetch_length.

The value ranges from 1 to 32768.

min_intel_prefetch_length=?

Min intel prefetch length, and the value must be smaller than or equal to that of the max_intel_prefetch_length.

The value ranges from 1 to 32768.

intel_prefetch_length_factor=?

Intel prefetch length factor, and the value must be greater than the ratio of Read Ahead identifier location to the prefetch length (the value of the ratio of Read Ahead identifier location to the prefetch length is 4 by default).

The value ranges from 1 to 32768.

Views

Developer view

Usage Guidelines

The change cache prefetch command is used to set the prefetch parameter.

Example

Set max_prefetch_length to 16384.

developer:/>change cache prefetch max_prefetch_length=16384 
WARNING: You are about to modify the cache prefetch parameter. The operation affects system performance.  
Suggestion: Before performing the operation, confirm that the cache prefetch parameter is correct. 
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: 2019-07-12

Document ID: EDOC1000138389

Views: 498073

Downloads: 85

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