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Advanced O&M Command Reference
OceanStor 18000 and 18000F V5 Series V500R007

This document is applicable to OceanStor 18500 V5, 18800 V5, 18500F V5, and 18800F V5. 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.

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cache show iomode

cache show iomode

Function

The cache show iomode command is used to query information about cache I/O model identification including cache model identification threshold and detailed information about a cache object.

Format

cache show iomode prefetchthreshold

cache show iomode volumeid

cache show iomode volumeid type

cache show iomode volumeid bucket buckettype

cache show iomode volumeid bucket buckettype bucketinfo

Parameters

Parameter

Description

Value

prefetchthreshold Queried prefetch threshold.

-

volumeid Volume ID.

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

type I/O model statistical type.

The value is "bandwidth", "seqnum", "updatetime", "threshold", or "readdisktime", where:

  • "bandwidth": bandwidth statistics.
  • "seqnum": number of sequence flows.
  • "updatetime": update time.
  • "threshold": object prefetch threshold.
  • "readdisktime": duration of reading disks.
bucket I/O statistical bucket.

-

buckettype I/O statistical bucket type based on the I/O size.

The value is an integer ranging from 0 to 3.

  • "0": The I/O size ranges from 0 to 64 KB.
  • "1": The I/O size ranges from 64 KB to 256 KB.
  • "2": The I/O size ranges from 256 KB to 1 MB.
  • "3": The I/O size ranges from 1 MB to ∞.
bucketinfo Bucket statistics.

The value is "readhit", "hitprefetch", "flowtype", "flowmulti", or "threshold", where:

  • "readhit": hit count.
  • "hitprefetch": hit prefetch count.
  • "flowtype": count of sequence flow types.
  • "flowmulti": sequence flow length count.
  • "threshold": threshold.

Views

Diagnostic view

Usage Guidelines

None

Example

Query the statistics of the cache object whose volume ID is 0 and the bucket whose I/O statistical type is 0.

ibc_os_hs:/diagnose>cache show iomode 0 bucket 0
cur bucket is:0_to_64KB
read hit record:
missHit   :0         :0         :0         :0         :0         :0         :0         
normalHit :3088      :47517     :47341     :47335     :47468     :47422     :126877668 
reHit     :0         :0         :0         :0         :0         :0         :1591      
fakeHit   :0         :2         :0         :0         :0         :0         :530
:totalCnt  :3988      :47521     :47341     :47335     :47468     :47422     :126920950 
lastest 5 period readHit ratio:
missHit    ratio:0
normalHit  ratio:99
reHit      ratio:0
fakeHit    ratio:0
hit prefetch page record:
seqFlow    hitprefetch:35976     :380136    :378728    :378672    :379744    :379376    :1015019785
seqFlow    prefetch   :38592     :379616    :379008    :378432    :379584    :379584    :1015060137
conFlow    hitprefetch:0         :0         :0         :0         :0         :0         :128       
conFlow    prefetch   :0         :0         :0         :0         :0         :0         :1344      
diffFlow   hitprefetch:0         :0         :0         :0         :0         :0         :0         
diffFlow   prefetch   :0         :0         :0         :0         :0         :0         :0         
hit prefetch chunk record:
seqFlow    hitprefetch:791       :5940      :5918      :5917      :5933      :5928      :15860064  
seqFlow    prefetch   :828       :5932      :5922      :5913      :5931      :5931      :15861012  
conFlow    hitprefetch:0         :0         :0         :0         :0         :0         :16        
conFlow    prefetch   :0         :0         :0         :0         :0         :0         :21        
diffFlow   hitprefetch:0         :0         :0         :0         :0         :0         :0         
diffFlow   prefetch   :0         :0         :0         :0         :0         :0         :0         
 
lastest 5 period waste page ratio:
seqFlow    waste page ratio:0
conFlow    waste page ratio:0
diffFlow   waste page ratio:0
lastest 5 period waste chunk ratio:
seqFlow    waste chunk ratio:0
conFlow    waste chunk ratio:0
diffFlow   waste chunk ratio:0
flow Type record:
seqFlow   :8478      :47521     :47341     :47335     :47468     :47422     :126923829 
conFlow   :0         :0         :0         :0         :0         :0         :16        
diffFlow  :0         :0         :0         :0         :0         :0         :0         
flow Type record:
0 multiple:0         :1         :0         :0         :0         :0         :38311     
1 multiple:0         :1         :0         :0         :0         :0         :3414      
2 multiple:0         :1         :0         :0         :0         :0         :267       
3 multiple:0         :1         :0         :0         :0         :0         :42        
4 multiple:0         :1         :0         :0         :0         :0         :42        
5 multiple:0         :1         :0         :0         :0         :0         :38        
6 multiple:0         :1         :0         :0         :0         :0         :37        
7 multiple:0         :1         :0         :0         :0         :0         :37        
8 multiple:0         :1         :0         :0         :0         :0         :40        
9 multiple:11934     :47512     :47341     :47335     :47468     :47422     :126885070 
bucket threshold:
seqFlowPrefetchThreshold        :2
conFlowPrefetchThreshold        :4
difFlowPrefetchThreshold        :4
maxShortSeqPrefetchMulti        :8
isFirstPrefetch                 :0
index                           :4
periodBitmap                  :31

System Response

None

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Updated: 2020-03-19

Document ID: EDOC1000181602

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