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Recent questions tagged timestamp-ordering
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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
T1: R(X), T2: W(X), T2: commit, T1: W(X), T1: commit, T3: R(X), T3: commitis this allowed in Thomas write rule?if yes then what will be the serial order
aditi19
1.1k
views
aditi19
asked
Dec 1, 2018
Databases
databases
transaction-and-concurrency
concurrency
timestamp-ordering
view-serializable
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0
votes
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.
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 Ti...
saxena0612
399
views
saxena0612
asked
Dec 13, 2017
Databases
timestamp-ordering
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–
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.
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 ...
Arjun
26.7k
views
Arjun
asked
Feb 14, 2017
Databases
gatecse-2017-set1
databases
timestamp-ordering
deadlock-prevention-avoidance-detection
normal
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–
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?
Schedule S:- R1(A) R2(B) R3(C) R1(B) R2(C)R3(D)W1(C)W2(D)W3(E) , following is the dependency graphWhich of the transaction is rollbacked if Time stamp order is?a.) (T1,...
rahul sharma 5
1.7k
views
rahul sharma 5
asked
Jan 8, 2017
Databases
databases
timestamp-ordering
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–
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
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) W...
Samujjal Das
4.2k
views
Samujjal Das
asked
Nov 12, 2016
Databases
databases
timestamp-ordering
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