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Differentiate Optimistic concurrency control and pessimistic concurrency control?
Wiki User
∙ 13y ago
concurrency control algorithm
Wiki User
∙ 13y ago
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What are disadvantages of concurrency control?
I think the following could be the disadvantages of concurrency control: 1: resource consumption
Which are the concurrency control protocols ensure both conflict serializability and freedom from deadlock?
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.
What is vf speed control?
It is used for sensorless motor control. With vf speed control u can control speed of any induction motor.
What is a congestion control mechanism?
Congestion control mechanisms are tools that control how backed up a substance may get. Traffic congestion control mechanisms can be stop lights, for example.
What is a derivative control?
Derivative control applied in control engineering, usually for the operation of control valves and its importance came during valve tuning. Derivative control is popularly known as anticipatory control. ( controller starts its control action, by anticipating the trend of present value (PV) of parameter.) Derivative control anticipates parameter values and and it will take control action to control the parameter with in set point. Eg: In a water heating system, water temperature is controlled by controlling steam valve opening. Let set point for water is 80°C, and derivative control will check the status of water temperature and if it is slowly increasing range ( may be due to some load change), controller will starts to control temperature by slowly closing steam valve. ( and vice versa) Actually this type control action just observe at control parameter values and initiates control action.
What are disadvantages of concurrency control?
I think the following could be the disadvantages of concurrency control: 1: resource consumption
What is concurrency control techniques?
several problems can occur when concurrent transaction execute in an uncontrolled manner.
Difference between coordination and control mixed?
differentiate coordination and control
The dbms or some other related software components which enforce certain recovery and concurrency control are called are?
that's auto-recovery!
Differentiate between conditional and unconditional transfer control?
لااعلم
How are locking techniques used for concurrency control?
Concurrency means use of database by many users at the same time.Concurrency control techniques (Different techniques) are used control multiple transactions interfere each other to produce wrong results. therefore one of the main techniques used to control concurrent execution of transaction is based on the concept of locking of data item. A lock is a variable associated with a data item in the database and describes the status of that item with respect to possible operation that can be applied to that item. Generally there is a one lock for each data item in the database.
What is disadvantages of concurrency control?
Disadvantage of concurrent control: Since concurrent control uses a series of checks throughout the process/project chain, clarity about the standards required at each control point is essential. This requires a thorough and detailed understanding of the specific tasks involved and their relationship to the desired end product/project outcomes.
What are the three most common concurrent transaction execution problems?
The three most common concurrent transaction executive problems are uncommitted data, lost updates, and inconsistent retrievals. It is believed that concurrency control can help these problems.
What nice character trait starts with the letter o?
People can be described as being obedient, obnoxious, obscene, observant, odd, oddball, offensive, old-fashioned, optimistic, outgoing, outrageous, outstanding, overbearing or overconfident. They begin with the letter o.
Which are the concurrency control protocols ensure both conflict serializability and freedom from deadlock?
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.
Bypass the crankshaft positon sensor on dodge Dakota?
You can't. The engine's control unit needs it to differentiate between spark and fuel injection events.
What is the difference between control characters and frame delimiters?
Yes we can differentiate the control character from frame delimiters, as there is need to distinguish between data being send and control information so frame delimiters arrange for sending side to change the data slightly before it is sent
