No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

Advanced O&M Command Reference

OceanStor 2800 V3 V300R006

This document is applicable to OceanStor 2800 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.
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
cache show prefetch

cache show prefetch

Function

The cache show prefetch command is used to view the prefetch information in a Cache.

Format

cache show prefetch info volumeId

cache show prefetch intelfactor

cache show prefetch maxlength

Parameters

Parameter

Description

Value

info

Type of prefetch information.

The value can be wastepages, status, or list.

  • wastepages: volume Cache and stripe Cache.
  • status: volume Cache.
  • list: stripe Cache.

volumeId

Volume ID.

The value ranges from 0 to 2^64 - 1.

intelfactor

Parameter for intelligent prefetch of Cache.

-

maxlength

The maximum length of prefetch.

The value can be from 4096 to 16384.

Views

Diagnostic view

Usage Guidelines

None

Example

View the number of waste prefetch pages in the cache object of volume 0.

admin:/diagnose>cache show prefetch wastepages 0 
Obj [0] prefetch waste pages detail:  
  Total prefetch pages(volume layer)       : 1 = 0(MB) 
  Total prefetch waste pages(volume layer) : 0 = 0(MB)

System Response

The following table describes the parameter meanings.

Parameter

Meaning

Total prefetch pages(volume layer)

Number of prefetched pages in layer 1 Cache.

Total prefetch waste pages(volume layer)

Number of wasted prefetched pages in layer 1 Cache.

Async prefetch status

Status of asynchronous prefetch.

Async prefetch threshold

Threshold of asynchronous prefetch.

Async prefetch threshold percent:

Percentage threshold of asynchronous prefetch.

volumeId

Volume ID of a Cache object.

objectId

ID of the Cache object.

lba

LBA of a request on the prefetch linked list.

len

Length of data in the REQ on the prefetch linked list.

endLba

LBA of the REQ end on the prefetch linked list.

step

Current prefetch progress.

req

REQ address on the prefetch linked list.

opCode

Operation code of the prefetch.

Max length

Maximum prefetch length.

Min length

Minimum prefetch length.

Translation
Download
Updated: 2019-07-12

Document ID: EDOC1000138381

Views: 671060

Downloads: 36

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next