Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. Once more considering the RPC mechanism consider the exactly once semantic. Does the algorithm for implementing this semantic implement correctly even if the ACK message back to the client is lost due to a network problem? Explain the sequence of messages and whether exactly once is still preserved.
Answer: The exactly once semantics make sure that a more procedure will be executed exactly once and only once. The universal algorithm for ensuring this combines an acknowledgment (ACK) scheme combined with timestamps (or some other incremental counter that allows the server to distinguish between duplicate messages).
The universal strategy is for the client to send the RPC to the server along with a timestamp. The client will as well start a timeout clock. The client will after that wait for one of two occurrences: (1) it will receive an ACK as of the server indicating that the remote procedure was performed or (2) it will time out If the client times out it presume the server was unable to perform the remote procedure so the client invokes the RPC a second time sending a later timestamp. The client mayn't receive the ACK for one of two reasons (1) the original RPC was never received by the server or (2) the RPC was correctly received-and performed-by the server however the ACK was lost. In situation (1) the use of ACKs permits the server ultimately to receive and perform the RPC. In situation (2) the server will obtain a duplicate RPC and it will use the timestamp to identify it as a duplicate so as not to perform the RPC a second time. It is significant to note that the server must send a second ACK back to the client to inform the client the RPC has been performed.
In a multiprogramming and time-sharing environment, several users share the system simultaneously. This situation can result in various security problems. a
Define thread cancellation & target thread. The thread cancellation is the task of terminating a thread before it has completed. A thread that is to be cancelled is often refer
Question: OS Installation / File system a) Why is NTFS portioning preferred over FAT16 or FAT32 when security is of primary concern? b) State a situation or an application w
What is protection of input output?
Questiion 1 What is RTOS? What are its requirements? Questiion 2 Explain the structural elements of a real time system mode Questiion 3 What is kernel? Explain abo
Q. Consider a system that holds 5000 users. Presume that you want to allow 4990 of these users to be able to access one file. a. How would you denote this protection scheme in
At the end of this lecture, and into the next lecture, we will discuss the last major type of logical error that can occurwhen programming with threads. A deadlock occurswhen two t
Q. Operating System as User Interface? • Every general purpose computer comprises the operating system, hardware, system programs and application programs. The hardware compris
combined approaches (ULT/KLT)
When programming with threads, there are three very common mistakes that programmers often make: 1. locking twice (depending on the system and type of lock, can cause crashes, h
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd