PolicyUnit Struct

Definizione

Spazio dei nomi:

System.IO.Log

Assembly:

System.IO.Log.dll

Rappresenta una misura della dimensione nei criteri dell'archivio dei log.

public value class PolicyUnit

public struct PolicyUnit

type PolicyUnit = struct

Public Structure PolicyUnit

Ereditarietà

Object

ValueType

PolicyUnit

Esempio

In questo esempio viene illustrato come utilizzare la classe LogPolicy e la struttura PolicyUnit per impostare criteri per una sequenza di record del registro.

// SET LOG POLICY

LogPolicy policy = sequence.LogStore.Policy;

// Set AutoGrow policy. This enables the log to automatically grow
// when the existing extents are full. New extents are added until
// we reach the MaximumExtentCount extents.
// AutoGrow policy is supported only in Windows Vista and not available in R2.

//policy.AutoGrow = true;

// Set the Growth Rate in terms of extents. This policy specifies
// "how much" the log should grow.
policy.GrowthRate = new PolicyUnit(2, PolicyUnitType.Extents);

// Set the AutoShrink policy. This enables the log to automatically
// shrink if the available free space exceeds the shrink percentage.
// AutoGrow/shrink policy is supported only in Windows Vista and not available in R2.

//policy.AutoShrinkPercentage = new PolicyUnit(30, PolicyUnitType.Percentage);

// Set the PinnedTailThreshold policy.
// A tail pinned event is triggered when there is no
// log space available and log space may be freed by advancing the base.
// The user must handle the tail pinned event by advancing the base of the log.
// If the user is not able to move the base of the log, the user should report with exception in
// the tail pinned handler.
// PinnedTailThreashold policy dictates the amount of space that the TailPinned event requests
// for advancing the base of the log. The amount of space can be in percentage or in terms of bytes
// which is rounded off to the nearest containers in CLFS. The default is 35 percent.

policy.PinnedTailThreshold = new PolicyUnit(10, PolicyUnitType.Percentage);

// Set the maximum extents the log can have.
policy.MaximumExtentCount = 6;

// Set the minimum extents the log can have.
policy.MinimumExtentCount = 2;

// Set the prefix for new containers that are added.
// when AutoGrow is enabled.
//policy.NewExtentPrefix = "MyLogPrefix";

// Set the suffix number for new containers that are added.
// when AutoGrow is enabled.
policy.NextExtentSuffix = 3;

// Commit the log policy.
policy.Commit();

// Refresh updates the IO.Log policy properties with current log policy
// set in the log.
policy.Refresh();

// LOG POLICY END
//

' SET LOG POLICY

Dim policy As LogPolicy = sequence.LogStore.Policy

' Set AutoGrow policy. This enables the log to automatically grow
' when the existing extents are full. New extents are added until
' we reach the MaximumExtentCount extents.
' AutoGrow policy is supported only in Windows Vista and not available in R2.

'policy.AutoGrow = true;

' Set the Growth Rate in terms of extents. This policy specifies
' "how much" the log should grow. 
policy.GrowthRate = New PolicyUnit(2, PolicyUnitType.Extents)

' Set the AutoShrink policy. This enables the log to automatically
' shrink if the available free space exceeds the shrink percentage. 
' AutoGrow/shrink policy is supported only in Windows Vista and not available in R2.

'policy.AutoShrinkPercentage = new PolicyUnit(30, PolicyUnitType.Percentage);

' Set the PinnedTailThreshold policy.
' A tail pinned event is triggered when there is no
' log space available and log space may be freed by advancing the base.
' The user must handle the tail pinned event by advancing the base of the log. 
' If the user is not able to move the base of the log, the user should report with exception in
' the tail pinned handler.
' PinnedTailThreashold policy dictates the amount of space that the TailPinned event requests 
' for advancing the base of the log. The amount of space can be in percentage or in terms of bytes 
' which is rounded off to the nearest containers in CLFS. The default is 35 percent.


policy.PinnedTailThreshold = New PolicyUnit(10, PolicyUnitType.Percentage)

' Set the maximum extents the log can have.
policy.MaximumExtentCount = 6

' Set the minimum extents the log can have.
policy.MinimumExtentCount = 2

' Set the prefix for new containers that are added. 
' when AutoGrow is enabled.
'policy.NewExtentPrefix = "MyLogPrefix";

' Set the suffix number for new containers that are added.
' when AutoGrow is enabled. 
policy.NextExtentSuffix = 3

' Commit the log policy.
policy.Commit()

' Refresh updates the IO.Log policy properties with current log policy 
' set in the log. 
policy.Refresh()

' LOG POLICY END
'

Commenti

La struttura PolicyUnit rappresenta una misura della dimensione nei criteri dell'archivio dei log. L'enumerazione PolicyUnitType elenca le unità di misura che possono essere rappresentate.

Per determinare la dimensione della misura, è possibile utilizzare la proprietà Value. Per determinare l'unità di misura, utilizzare la proprietà Type. È possibile convertire altri tipi di dati in una struttura PolicyUnit utilizzando i metodi Percentage e Extents.

Costruttori

PolicyUnit(Int64, PolicyUnitType)

Inizializza una nuova istanza della struttura PolicyUnit con il valore e il tipo specificati.

Proprietà

Type	Ottiene il tipo di unità dell'oggetto PolicyUnit.
Value	Ottiene il valore dell'oggetto PolicyUnit.

Metodi

Equals(Object)	Indica se questa istanza e un oggetto specificato sono uguali.
Extents(Int64)	Crea una struttura PolicyUnit di tipo Extents a partire dal numero specificato.
GetHashCode()	Fornisce un codice hash univoco per questo oggetto.
Percentage(Int64)	Crea una struttura PolicyUnit di tipo Percentage a partire dal numero specificato.
ToString()	Restituisce una rappresentazione sotto forma di stringa dell'oggetto corrente.

Operatori

Equality(PolicyUnit, PolicyUnit)	Confronta due istanze PolicyUnit per determinarne l'uguaglianza.
Inequality(PolicyUnit, PolicyUnit)	Confronta due istanze PolicyUnit per determinare se sono diverse.

Vedi anche

• LogPolicy
• PolicyUnitType