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Snapshot isolation has received a considerable amount of attention in the context of full database replication. Such popularity is mainly because read-only transactions executing under snapshot isolation are never blocked or aborted. In partial replication, where each replica holds only a part of the database, transactions may require access to remote databases. Each remote read operation of the transaction...
Replication has been told to be a solution to provide scalability and high availability in databases. Unfortunately, the cost of ensuring isolated and consistent executions is sometimes too high. Weakest isolation models have proved to be a way to reduce this cost but they can violate some applications transactions isolation needs. In stand-alone systems, models supporting different isolation restrictions...
One of the weaknesses of database replication protocols, compared to centralized DBMSs, is that they are unable to manage concurrent execution of transactions at different isolation levels. In the last years, some theoretical works related to this research line have appeared but none of them has proposed and implemented a real replication protocol with support to multiple isolation levels. This paper...
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