Click here to Skip to main content
15,393,377 members
Articles / .NET
Article
Posted 7 May 2012

Tagged as

Stats

27.9K views
14 bookmarked

.NET Interview Questions: Mention LeaseTime, SponsorshipTime, RenewonCallTime and LeaseManagerPollTime

Rate me:
Please Sign up or sign in to vote.
4.33/5 (5 votes)
8 May 2012CPOL2 min read
This is a very important question from a practical implementation point of view.

This is a very important question from a practical implementation point of view. Companies who have specific requirement for Remoting projects will expect this question to be answered.

In normal .NET environment objects garbage collector manages lifetime. However, in remoting environment remote clients can access objects, which are out of control of garbage collector. Garbage collector boundary is limited to a single PC on which framework is running; any remote client across physical PC is out of control of GC (Garbage Collector).

This constraint of garbage collector leads to a new way of handling lifetime for remoting objects, by using concept called as “LeaseTime”. Every server side object is assigned by default a “LeaseTime” of five minutes. This lease time is decreased at certain intervals. Again, for every method call a default of two minutes is assigned. When I say method call means every call made from client. This is called as “RenewalOnCallTime”.

Let’s put the whole thing in equation to make the concept more clear.

Total Remoting object life time = LeaseTime + (Number of method calls) X (RenewalTime).

Then default Remote Object Life Time = 5 + (1) X 2 = 10 minutes (Everything is in minutes)

When total object lifetime is reduced to zero, then it queries the sponsor that should the object be destroyed. Sponsor is an object, which decides should object Lifetime be renewed. So it queries any registered sponsors with the object, if does not find any then the object is marked for garbage collection. After this garbage, collection has whole control on the object lifetime. If we do not foresee how long a object will be needed specify the “Sponsorship Timeout” value. Sponsorship Timeout is time unit a call to a sponsor is timed out.

“LeaseManagerPollTime” defines the time the sponsor has to return a lease time extension.

View the following video on Garbage Collector, Gen 0, 1 & 2 asked in C# .NET interview: video.

Learn more on .NET interview questions.

From more on author’s blog related to .NET interview questions click and visit.

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Share

About the Author


Comments and Discussions

 
GeneralMy vote of 1 Pin
dvptUml3-Mar-13 1:48
MemberdvptUml3-Mar-13 1:48 
codeproject is codeproject, not another internet site
GeneralRe: My vote of 1 Pin
Shivprasad koirala3-Mar-13 4:01
MemberShivprasad koirala3-Mar-13 4:01 
GeneralMy vote of 5 Pin
Rupesh Kumar Tiwari14-May-12 5:11
MemberRupesh Kumar Tiwari14-May-12 5:11 
QuestionRemote Object Life Time Pin
Biegal9-May-12 4:06
MemberBiegal9-May-12 4:06 
AnswerRe: Remote Object Life Time Pin
srihari.sridharan13-Nov-12 20:22
Membersrihari.sridharan13-Nov-12 20:22 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.