When we say that a schedule is conflict equivalent What do we mean by that?

Conflict Equivalent: Two schedules are said to be conflict equivalent when one can be transformed to another by swapping non-conflicting operations.

Why all conflict serializable schedules are view serializable?

View equivalence is also based purely on reads and writes alone. A schedule S is view serializable if it is ie w equivalent to a serial schedule. Every conflict serializable schedule is also view serializable. Every view serializable schedule which is not conflict serializable has blind writes.

Can a schedule be conflict serializable but not serializable?

It’s true that conflict serializable schedules are a subset of view serializable schedules, but your second sentence is incorrect. A schedule can be VIEW serializable but also not be CONFLICT serializable (not the other way around).

Is the schedule conflict serializable?

A schedule is called conflict serializability if after swapping of non-conflicting operations, it can transform into a serial schedule. The schedule will be a conflict serializable if it is conflict equivalent to a serial schedule.

What is the difference conflict equivalent and conflict serializable?

1. Two schedules are said to be conflict equivalent if all the conflicting operations in both the schedule get executed in the same order. If a schedule is a conflict equivalent to its serial schedule then it is called Conflict Serializable Schedule.

Is this schedule conflict serializable or not justify your answer?

Solution: The schedule is not conflict serializable because the precedence graph contains a cycle. The graph has an edge T0 → T1 because the schedule contains w0[A] → r1[A]. The graph has an edge T1 → T0 because the schedule contains r1[B] → wo[B].

How does conflict serializable schedule differ from view serializable?

Two schedules are said to be conflict equivalent if all the conflicting operations in both the schedule get executed in the same order. If a schedule is view equivalent to its serial schedule then it is called View Serializable Schedule.

What is view equivalent schedule?

Prerequisite – Types of Schedules in DBMS. View serializability is a concept that is used to compute whether schedules are View-Serializable or not. A schedule is said to be View-Serializable if it is view equivalent to a Serial Schedule (where no interleaving of transactions is possible).

Are all conflict serializable schedule view serializable?

A schedule S is view serializable if it is view equivalent to a serial schedule. Every conflict serializable schedule is also view serializable.

How do you find equivalent conflicts?

To check whether the given schedules are conflict equivalent or not,

1. We will write their order of pairs of conflicting operations.
2. Then, we will compare the order of both the schedules.
3. If both the schedules are found to have the same order, then they will be conflict equivalent.

How do you identify whether a given schedule is serializable or not?

If a precedence graph for schedule S contains a cycle, then S is non-serializable. If the precedence graph has no cycle, then S is known as serializable.

How will you determine whether a schedule is serializable or not?

A schedule will view serializable if it is view equivalent to a serial schedule. If a schedule is conflict serializable, then it will be view serializable. The view serializable which does not conflict serializable contains blind writes.

What is the difference between conflict serializable and conflict equivalent?

If a schedule S can be transformed into a schedule S´ by a series of swaps of non-conflicting instructions, we say that S and S´ are conflict equivalent. We say that a schedule S is conflict serializable if it is conflict equivalent to a serial schedule. Conflict serializable means conflict equuivalent to any serial schedule.

What is confconflict serializable schedule?

Conflict Serializable: A schedule is called conflict serializable if it can be transformed into a serial schedule by swapping non-conflicting operations. Conflicting operations: Two operations are said to be conflicting if all conditions satisfy: They belong to different transactions They operate on the same data item

Is S1 conflict serializable?

S12 is a serial schedule in which all operations of T1 are performed before starting any operation of T2. Since S has been transformed into a serial schedule S12 by swapping non-conflicting operations of S1, S1 is conflict serializable. Let us take another Schedule: Two transactions will be:

What is the difference between view serializable schedule and serial schedule?

If a schedule is view equivalent to its serial schedule then it is called View Serializable Schedule. 2. If a schedule is view serializable then it may or may not be conflict serializable. If a schedule is conflict serializable then it is also view serializable schedule. 3.