什么是强迫缓存过期ASP.NET中的最好方法？ [英] What's the best method for forcing cache expiration in ASP.NET?

问题描述

假设我有跨多个Web服务器上运行的负载平衡器后面的ASP.NET应用程序：

Suppose I have an ASP.NET application running across several web servers behind a load balancer:

我可以：

• 力的OutputCache（页和/或控制电平）在全球范围内过期？

• Force OutputCache (Page and/or Control level) to expire globally?

力数据缓存（即Cache.Insert）到期？

Force Data Cache (i.e. Cache.Insert) to expire?

从一个中央位置监控ASP.NET缓存使用（键，RAM等）？

Monitor ASP.NET caching usage (keys, RAM, etc) from a central location?

一种可能的解决办法是有高速缓存的每次使用检查文件依赖更改。该文件可能被触及这将过期的所有高速缓存。然而，这要求开发人员在其所有code的依赖。是他们的一个更好的解决方案？

One possible solution would be to have every usage of cache check a file dependency for changes. The file could be touched which would expire all cache. However, this requires developers to include the dependency in all their code. Is their a better solution?

推荐答案

有许多方法可以使这些缓存过期，如页面的OutputCache通过

There are many ways to make these caching expire, like page outputcache by

Page.Response.Cache.SetCacheability(HttpCacheability.NoCache)

基于时间的依赖性仅仅在一个时间限定点过期的项目

Time-based dependency simply expires the item at a defined point in time.

Response.Cache.SetExpires(DateTime.Now.AddSeconds(360));
Response.Cache.SetCacheability(HttpCacheability.Private)
Response.Cache.SetSlidingExpiration(true);

现在，当涉及到监测缓存，除非上的缓存来告诉你一个API，那么有没有直接的方法。

Now when it comes to monitoring cache, unless there is an API on the cache to tell you, then there is no direct way.

您当然可以列举缓存，键 - 值对，然后计算存储每个项目的大小。犯规听起来很容易吧??

You could of course enumerate the cache,key-value pairs and then calculate the size of each item stored. Doesnt sound easy right??

的使缓存监控方便。坦白说，我从来没有使用过自己，但你可以试试看，增加一个dll到你的应用程序只是此事。

So here's to make your cache monitoring easy. Frankly saying i never used it myself, but you can give it a try, just the matter of adding a dll to your application.

和这里的东西为你的缓存键查看，

And here's something for your cache keys view,

' display contents of the ASP.NET Cache
If Cache.Count > 0 Then    
  cc.Append("<b>Contents of the ASP.NET Cache (" _    
          & Cache.Count.ToString() & " items):</b><br />")    
  For Each item As Object In Cache    
    cc.Append("Key:'" & item.Key & "' Type:" _    
            & item.Value.GetType().ToString() & "<br />")    
  Next    
Else    
  cc.Append("<b>ASP.NET Cache is empty</b>")    
End If

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