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Recent questions tagged timestamp-ordering

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1

Raghuramkrishnan
T1: R(X), T2: W(X), T2: commit, T1: W(X), T1: commit, T3: R(X), T3: commit is this allowed in Thomas write rule? if yes then what will be the serial order

aditi19 asked in Databases Dec 1, 2018

1.1k views

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0 answers

2

Self_doubt_Timestamps_Ordering
Comment on Statement : When a Transaction rolled back or aborted due to some reason by another transaction,and same transaction wakes up after random time ,It holds new Timestamp.

saxena0612 asked in Databases Dec 13, 2017

412 views

83 votes

4 answers

3

GATE CSE 2017 Set 1 | Question: 42
In a database system, unique timestamps are assigned to each transaction using Lamport's logical clock. Let $TS(T_{1})$ and $TS(T_{2})$ be the timestamps of transactions $T_{1}$ and $T_{2}$ ... -free. The database system is starvation-free, but not deadlock-free. The database system is neither deadlock-free nor starvation-free.

Arjun asked in Databases Feb 14, 2017

by Arjun

26.9k views

3 votes

1 answer

4

[DBMS] Time stamp Ordering Protocol
Schedule S:- R1(A) R2(B) R3(C) R1(B) R2(C)R3(D)W1(C)W2(D)W3(E) , following is the dependency graph Which of the transaction is rollbacked if Time stamp order is? a.) (T1,T2,T3)=(10,30,20) b.)(T1,T2,T3)=(20,10,30) Please explain approach to this?

rahul sharma 5 asked in Databases Jan 8, 2017

by rahul sharma 5

1.7k views

9 votes

1 answer

5

Basic Time Stamp Protocol
Which of the following schedule is allowed under basic time stamp protocol? S1: R1(X) R3(X) W1(X) R2(X) W3(X) S2: R1(X) R3(X) W3(X) W1(X) R2(X) S3: R3(X) R2(X) W3(X) R1(X) W1(X) S4: R1(X) R3(X) R2(X) W1(X) W3(X) A. S1 B. S2 C. S3 D. S4

Samujjal Das asked in Databases Nov 12, 2016

by Samujjal Das

4.3k views

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Recent questions tagged timestamp-ordering