Flashcard on Distributed Transactions

Front

What is a globally unique transaction timestamp?

Back

A timestamp issued by the first coordinator accessed by a transaction.

Front

What is the purpose of global validation in distributed transactions?

Back

To ensure the serializability of the combined orderings from individual servers.

Front

What is the MVGV algorithm designed to favor?

Back

Read-only transactions.

Front

What is a commitment deadlock?

Back

A situation where two transactions are waiting for each other to commit.

Front

What is the challenge of distributed transactions compared to single-server transactions?

Back

They take longer due to the two-phase commit protocol.

Front

What is the main goal of optimistic concurrency control?

Back

To validate transactions before they are allowed to commit.

Front

What is the purpose of the global wait-for graph?

Back

To theoretically construct a combined view of local wait-for graphs from multiple servers.