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 Data ONTAP® PowerShell Toolkit
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Cmdlet: Set-NcQosPolicyReadAhead
NAME
Set-NcQosPolicyReadAhead
SYNOPSIS
Modify a read-ahead policy.
SYNTAX
Set-NcQosPolicyReadAhead [-Name] <String> [-AlignBlocks <Int32>] [-Default [
<Boolean>]] [-DiskResponseFactor <Int32>] [-DiskResponseWeight <Int32>] [-Ea
rlyCount <Int32>] [-ForceDump [<Boolean>]] [-ForceFull [<Boolean>]] [-ForceN
one [<Boolean>]] [-InterarrivalWeight <Int32>] [-Jitter <Int32>] [-MaxBlocks
<Int32>] [-MaxDeadline <Int32>] [-MaxDiskResponseTime <Int32>] [-MaxGap <In
t32>] [-MaxRange <Int32>] [-MetadataBlocks <Int32>] [-MinBlocks <Int32>] [-M
inDiskResponseTime <Int32>] [-MinRange <Int32>] [-Overshoot <Int32>] [-Small
fileBlocks <Int32>] [-UseAsync [<Boolean>]] [-UseFeedback [<Boolean>]] [-Use
Timing [<Boolean>]] [-MinRetireTime <Int32>] [-MaxRetireTime <Int32>] [-UseH
istogram [<Boolean>]] [-Controller <NcController[]>] [<CommonParameters>]
DESCRIPTION
Modify a read-ahead policy.
PARAMETERS
-Name <String>
Name of QoS read ahead policy.
Required? true
Position? 1
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-AlignBlocks <Int32>
Block Alignment
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-Default [<Boolean>]
Default
Required? false
Position? named
Default value
Accept pipeline input? false
Accept wildcard characters? false
-DiskResponseFactor <Int32>
Disk Response Time Factor
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-DiskResponseWeight <Int32>
Weight for Disk Response Time Aging (%)
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-EarlyCount <Int32>
Number of IO Operations Cautiously Predicted
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-ForceDump [<Boolean>]
Force DUMP-Style Readahead
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-ForceFull [<Boolean>]
Force Full-File Readahead
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-ForceNone [<Boolean>]
Disable Readahead
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-InterarrivalWeight <Int32>
Weight for Interarrival Time Aging (%)
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-Jitter <Int32>
Threshold for Detecting Jitter (%)
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-MaxBlocks <Int32>
Maximum Blocks to Speculate
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-MaxDeadline <Int32>
Maximum Deadline Offset (us)
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-MaxDiskResponseTime <Int32>
Maximum Disk Response Time (us)
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-MaxGap <Int32>
Maximum Speculative Blocks Outstanding
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-MaxRange <Int32>
Maximum Range Used When Aging Streams (Blocks)
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-MetadataBlocks <Int32>
Minimum Blocks for Which Metadata is Predicted
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-MinBlocks <Int32>
Minimum Blocks to Speculate
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-MinDiskResponseTime <Int32>
Minimum Disk Response Time (us)
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-MinRange <Int32>
Minimum Range Used When Aging Streams (Blocks)
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-Overshoot <Int32>
Allowable Overshoot (%)
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-SmallfileBlocks <Int32>
Maximum Blocks for Small-File Handling
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-UseAsync [<Boolean>]
Use Asynchronous Speculation
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-UseFeedback [<Boolean>]
Provide Cache-Miss Feedback
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-UseTiming [<Boolean>]
Use Timing Algorithms
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-MinRetireTime <Int32>
Minimum Time Before a Stream is Retired (us)
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-MaxRetireTime <Int32>
Maximum Time Before a Stream is Retired (us)
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-UseHistogram [<Boolean>]
If true, use Histogram-based predictions.
Required? false
Position? named
Default value
Accept pipeline input? true (ByPropertyName)
Accept wildcard characters? false
-Controller <NcController[]>
A clustered Data ONTAP controller to receive this cmdlet, as embodied by
an NcController object. This parameter is returned by the Connect-NcCo
ntroller cmdlet. If not specified, the value in the global variable Cur
rentNcController is used. In the latter case, if CurrentNcController co
ntains a collection of NcController objects, this cmdlet is invoked on e
ach controller in succession.
Required? false
Position? named
Default value
Accept pipeline input? true (ByValue, ByPropertyName)
Accept wildcard characters? false
<CommonParameters>
This cmdlet supports the common parameters: Verbose, Debug,
ErrorAction, ErrorVariable, WarningAction, WarningVariable,
OutBuffer and OutVariable. For more information, type,
"get-help about_commonparameters".
INPUTS
OUTPUTS
DataONTAP.C.Types.Qos.QosPolicyReadAheadInfo
NOTES
Category: qos
API: qos-policy-read-ahead-modify,qos-settings-read-ahead-modify
Family: cluster
-------------- Example 1 --------------
C:\PS>Set-NcQosPolicyReadAhead test -ForceNone:$true -Overshoot 30
Set some properties on the given quality of service read ahead policy.
ReadAheadPolicyName : test
ReadAheadClass : user_defined
AlignBlocks : 64
Default : False
DiskResponseFactor : 3
DiskResponseWeight : 80
EarlyCount : 10
ForceDump : False
ForceFull : False
ForceNone : True
InterarrivalWeight : 80
Jitter : 80
MaxBlocks : 192
MaxDeadline : 1000000
MaxDiskResponseTime : 50000
MaxGap : 1024
MetadataBlocks : 64
MinBlocks : 128
MinDiskResponseTime : 1000
MinRange : 3840
Overshoot : 30
SmallfileBlocks : 16
UseAsync : True
UseFeedback : True
UseTiming : True
RELATED LINKS
Get-NcQosPolicyReadAhead
New-NcQosPolicyReadAhead
Remove-NcQosPolicyReadAhead
Update-NcQosPolicyReadAhead
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Data ONTAP® PowerShell Toolkit
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