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Which are the concurrency control protocols ensure both conflict serializability and freedom from deadlock?
Wiki User
∙ 12y ago
TIMESTAMP PROTOCOL.
The protocol manages concurrent execution such that the timestamps
determine the serializability order.
Timestamp protocol ensures freedom from deadlock as no
transaction ever waits.
Wiki User
∙ 12y ago
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What problem is solved by banker's algorithm?
deadlock avoidance
What is a readers writers problem without deadlock and starvation?
When using threads, the entire point of a reader/writer problem is to avoid deadlock and starvation. The only way to avoid deadlock or starvation without the use of semaphores is for there to be only one possible process that could run, that is one reader and one writer only.
How deadlock is achieved in java?
A Deadlock is a situation of indefinite waiting where the system is stuck at a particular point and would do nothing useful. For example Method A is waiting for B's input while B is waiting for C's input and C in turn is waiting for A's input. Here all the 3 methods would continue to wait because they are waiting on one another and the system is stuck. A deadlock usually occurs while using threads. Threads can lock objects on which they are processing and when multiple threads are waiting for the same object a Dead lock may occur. The use of the synchronize keyword can be used to avoid such deadlock situations.
What is the difference between deadlock and a race condition?
Race ConditionsA race condition occurs when two threads access a shared variable at the same time. The first thread reads the variable, and the second thread reads the same value from the variable. Then the first thread and second thread perform their operations on the value, and they race to see which thread can write the value last to the shared variable. The value of the thread that writes its value last is preserved, because the thread is writing over the value that the previous thread wrote.DeadlocksA deadlock occurs when two threads each lock a different variable at the same time and then try to lock the variable that the other thread already locked. As a result, each thread stops executing and waits for the other thread to release the variable. Because each thread is holding the variable that the other thread wants, nothing occurs, and the threads remain deadlocked.
What is the difference between infiltration and run off?
A "run off" is a situation where deadlock/tied competition exists and deciding contest is required to settle the issue. Infiltration on the other hand means entering illegally and secretly in an organization's, institution's premises/territory in order to spy on. Cabdulqaadir Axmed Warsame
What is the difference among deadlock avoidance detection and prevention?
Deadlock avoidance involves ensuring that the system never enters a deadlock state by using techniques like resource allocation strategies (e.g., Banker's algorithm) to ensure that resources are allocated in a way that avoids deadlock. Deadlock detection, on the other hand, involves periodically checking the system to see if a deadlock has occurred after it has happened. Deadlock prevention focuses on designing algorithms and protocols in a way that eliminates one of the conditions necessary for deadlock to occur, such as by ensuring that resources are requested in a specific order.
What is the difference between deadlock prevention and deadlock avoidance?
DEADLOCK PREVENTION:Preventing deadlocks by constraining how requests for resources can be made in the system and how they are handled (system design).The goal is to ensure that at least one of the necessary conditions for deadlock can never hold.DEADLOCK AVOIDANCE:The system dynamically considers every request and decides whether it is safe to grant it at this point,The system requires additional apriori information regarding the overall potential use of each resource for each process.Allows more concurrency.
What are the various strategies are used to handle deadlock and what is centralized and distributed deadlock detection and prevention?
There are four strategies of dealing with deadlock problem:1. The Ostrich ApproachJust ignore the deadlock problem altogether.2. Deadlock Detection and RecoveryDetect deadlock and, when it occurs, take steps to recover.3. Deadlock AvoidanceAvoid deadlock by careful resource scheduling.4. Deadlock PreventionPrevent deadlock by resource scheduling so as to negate at least one of the four conditions.
What is an antonym for the word deadlock?
The antonym for deadlock is agreement.
When was Holy Deadlock created?
Holy Deadlock was created in 1934.
When was Deadlock - film - created?
Deadlock - film - was created in 1931.
When was Wedlock Deadlock created?
Wedlock Deadlock was created in 1947.
What are the differences between deadlock avoidance and deadlock prevention in operating systems?
Deadlock Prevention: o Preventing deadlocks by constraining how requests for resources can be made in the system and how they are handled (system design). o The goal is to ensure that at least one of the necessary conditions for deadlock can never hold. * Deadlock Avoidance: o The system dynamically considers every request and decides whether it is safe to grant it at this point, o The system requires additional apriori information regarding the overall potential use of each resource for each process. o Allows more concurrency. Similar to the difference between a traffic light and a police officer directing traffic. * Deadlock deduction:- Often, neither avoidance nor deadlock prevention may be used. Instead deadlock detection and process restart are used by employing an algorithm that tracks resource allocation and process states, and rolls back and restarts one or more of the processes in order to remove the deadlock. Detecting a deadlock that has already occurred is easily possible since the resources that each process has locked and/or currently requested are known to the resource scheduler or OS. Detecting the possibility of a deadlock before it occurs is much more difficult and is, in fact, generally undecidable, because the halting problem can be rephrased as a deadlock scenario. However, in specific environments, using specific means of locking resources, deadlock detection may be decidable. In the general case, it is not possible to distinguish between algorithms that are merely waiting for a very unlikely set of circumstances to occur and algorithms that will never finish because of deadlock. Deadlock detection techniques include, but is not limited to, Model checking. This approach constructs a Finite State-model on which it performs a progress analysis and finds all possible terminal sets in the model. These then each represent a deadlock.
What are the release dates for House of Dreams - 2004 To Deadlock or Not to Deadlock 1-3?
House of Dreams - 2004 To Deadlock or Not to Deadlock 1-3 was released on: USA: 22 January 2004
How many pages does Holy Deadlock have?
Holy Deadlock has 311 pages.
What are the different method for handling deadlock?
deadlock handling by 2phase protocol
How was the deadlock broken in the 1860's?
The deadlock in the 1860s was broken through the American Civil War, which resulted in the defeat of the Confederate states and the preservation of the Union. This conflict led to the abolition of slavery and the passage of the 13th, 14th, and 15th Amendments to the U.S. Constitution, addressing key issues dividing the nation.
