PolicyUnit Structure

Définition

Espace de noms:

System.IO.Log

Assembly:

System.IO.Log.dll

Représente une mesure de la taille dans une stratégie du magasin des journaux.

public value class PolicyUnit

public struct PolicyUnit

type PolicyUnit = struct

Public Structure PolicyUnit

Héritage

Object

ValueType

PolicyUnit

Exemples

Cet exemple indique comment utiliser la classe LogPolicy et la structure PolicyUnit pour définir la stratégie d'une séquence d'enregistrement du journal.

// 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
'

Remarques

La structure PolicyUnit représente une mesure de la taille dans une stratégie du magasin des journaux. L'énumération PolicyUnitType répertorie les unités de mesure qui peuvent être représentées.

Vous pouvez utiliser la propriété Value pour déterminer la taille de la mesure. Pour déterminer l'unité de mesure, utilisez la propriété Type. Vous pouvez convertir d'autres types de données en PolicyUnit à l'aide des méthodes Percentage et Extents.

Constructeurs

PolicyUnit(Int64, PolicyUnitType)

Initialise une nouvelle instance de la structure PolicyUnit avec la valeur et le type spécifiés.

Propriétés

Type	Obtient le type d'unité de PolicyUnit.
Value	Obtient la valeur de PolicyUnit.

Méthodes

Equals(Object)	Indique si cette instance et un objet spécifié sont égaux.
Extents(Int64)	Crée un PolicyUnit de type Extents à partir du nombre spécifié.
GetHashCode()	Fournit un code de hachage unique pour cet objet.
Percentage(Int64)	Crée un PolicyUnit de type Percentage à partir du nombre spécifié.
ToString()	Retourne une représentation sous forme de chaîne de cet objet.

Opérateurs

Equality(PolicyUnit, PolicyUnit)	Compare deux instances PolicyUnit pour déterminer s'ils sont égaux.
Inequality(PolicyUnit, PolicyUnit)	Compare deux instances PolicyUnit pour déterminer si elles ne sont pas égales.

Voir aussi

• LogPolicy
• PolicyUnitType