LogPolicy.Refresh 方法
定义
public:
void Refresh();
public void Refresh ();
member this.Refresh : unit -> unit
Public Sub Refresh ()
例外
安装在日志上的策略集是无效的。The set of policies installed on the log is invalid.
- 或 --or-
日志的某个策略阻止完成此操作。A policy of the log prevented this operation from completing.
由于出现意外的 I/O 异常,因此无法执行该请求。The request could not be performed because of an unexpected I/O exception.
在当前平台上不支持设置此策略。Setting this policy is not supported on the current platform.
该方法是在序列已释放之后调用的。The method was called after the sequence has been disposed of.
没有足够的内存来继续执行该程序。There is not enough memory to continue the execution of the program.
记录序列已满。The record sequence is full.
操作系统拒绝了对指定的日志存储区的访问。Access for the specified log store is denied by the operating system.
示例
此示例演示如何使用 LogPolicy 类来设置日志记录序列的策略。This example shows how to use the LogPolicy class to set policy for a log record sequence.
// 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
'