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!
Suppose that a DBMS recognizes increment, which increments an integervalued object by 1, and decrement as actions, in addition to reads and writes. A transaction that increments an object need not know the value of the object; increment and decrement are versions of blind writes. In addition to shared and exclusive locks, two special locks are supported: An object must be locked in I mode before incrementing it and locked in D mode before decrementing it. An I lock is compatible with another I or D lock on the same object, but not with S and X locks.
1. Illustrate how the use of I and D locks can increase concurrency. (Show a schedule allowed by Strict 2PL that only uses S and X locks. Explain how the use of I and D locks can allow more actions to be interleaved, while continuing to follow Strict 2PL.)
2. Informally explain how Strict 2PL guarantees serializability even in the presence of I and D locks. (Identify which pairs of actions conflict, in the sense that their relative order can affect the result, and show that the use of S, X, I, and D locks according to Strict 2PL orders all conflicting pairs of actions to be the same as the order in some serial schedule.)
List all the data for all fields of the table the user selects.
consider the following scenarioas a network administrator for a company you want to configure an ip route between two
Client of yours is concerned about external intrusion on their corporate network, and those inside their environment that they seek to fire! They've heard about firewalls and they need your professional opinion as to whether, with the implementation ..
For example, if the input is 1011, then the output will be 1. You can assume that the input word is guaranteed to contain only 0s and 1s.
An observer wants to estimate the height of a building. At herfirst measurement, the angle of elevation to the top of thebuilding is 45 degrees. She walks 300 feet closer to the building and determines the angle of elevation to be 60 degrees
Modify the main method of the Transactions class to demonstrate this new capability.
Determine the smallest force P that will cause impending motion.
Based on the topic and outline from previous units, you will make a formal oral presentation to your instructor and peers. You will be required to present for 10-12 minutes using the Adobe Connect technology within the course area. Specifically, y..
The cylinder at E has a mass of 10 kg, and the coefficient of static friction between the cord and the peg is µs =01
As part of project to assess security risks for determining infrastructure, you have found that other managers often have various ideas on severity and levels of risk.
Find the PMF of Y, the number of points scored in a 1
What do you need to do. What do you base the preliminary assessment on. the platform. the software. the user's Internet browsing history. other
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: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd