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!
Explain Deadlock detection and recovery
Deadlock Detection - A deadlock is said to take place when there is a circular chain of transaction, every waiting for the release of a data - item held by the next transaction in the chain, the algorithm to detect a deadlock is relies on the detection of such type of a circular chain in the current system in wait - for - graph. The algorithm produces the wait - for - graph at regular intervals and observes it for a chain. The algorithm begins with the assumption that there is no deadlock.
Deadlock Recovery - To recover from deadlock. The cycles in the wait - for - graph should be broken. The general method of doing this is to roll back one or much more transactions in the cycles till the system shows no further deadlock situation. The procedure of deadlock recovery must make sure that a given transaction is not constantly the one chosen for rollback. The selection of the transaction to be rolled back is relies on the following considerations:
Properties of a Transaction A transaction has four main properties. These are: Atomicity Consistency Isolation or Independence Durability or Permanen
What type of view of total database content? Data base content Conceptual view of total database contain.
What are the two types of serializability? The two types of serializability is a) Conflict serializability b) View serializability
What are the disadvantages of relational data ? Disadvantages • Performance - If the number of tables among that relationships to be established are large and the tables t
what is binary relationship
Attributes attached to an entity can be of various types. Simple The attribute that cannot be further separated into smaller parts and shows the basic meaning is known as a
Ask questApollo Hospitals (AH) is a popular medical service provider in Oman. AH wants to automate its business functions into an information system. The proposed information syst
Adding Redundant Associations for Efficient Access Redundant associations do not add any type of information, therefore during design we should actually examine structure of o
Drawbacks of Data Distribution: The primary drawbacks of distributed database systems are the added complexity needed to ensure proper coordination between the sites. This increas
Critically evaluate the bulleted list of information-related items in this case study. How are each contradictory to the notion of being an information-literate knowledge worker?
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