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Fine-grained Refresh Strategies for Managing Replication in Database Clusters

by Stephane Gancarski, Cecile Le Pape, Cécile Le, Hubert Naacke - In VLDB Wshp. on Design, Implementation and Deployment of Database Replication , 2005
"... Relaxing replica freshness has been exploited in database clusters to optimize load balancing. In this paper, we propose to support... ..."
Abstract - Cited by 1 (1 self) - Add to MetaCart
Relaxing replica freshness has been exploited in database clusters to optimize load balancing. In this paper, we propose to support...

Transaction Routing with Freshness Control in a Cluster of Replicated Databases

by Hubert Naacke, François Dang Ngoc, Patrick Valduriez - in « Actes des 19e Journées Bases de Donnéees Avancéees (BDA’2003) », 2003. ATLAS 13
"... ABSTRACT: We consider the use of a cluster system with a shared nothing architecture for update-intensive autonomous databases. To optimize load balancing, we use optimistic database replication with freshness control. We propose a solution to transaction routing that preserves database and applicat ..."
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and application autonomy and a cost model to estimate replica freshness. Then we propose an algorithm for transaction routing that takes into account freshness requirements of transactions and replica freshness. We implemented our solution on a Linux cluster running Oracle 8i and performed extensive performance

The leganet system: Freshness-aware transaction routing in a database cluster

by Stéphane Gançarski, Hubert Naacke , Esther Pacitti , Patrick Valduriez , 2007
"... ... databases can be update-intensive and must remain autonomous. In this paper, we describe the Leganet system which performs freshness-aware transaction routing in a database cluster. We use multi-master replication and relaxed replica freshness to increase load balancing. Our transaction routing ..."
Abstract - Cited by 10 (4 self) - Add to MetaCart
... databases can be update-intensive and must remain autonomous. In this paper, we describe the Leganet system which performs freshness-aware transaction routing in a database cluster. We use multi-master replication and relaxed replica freshness to increase load balancing. Our transaction routing

Refresco: Improving Query Performance Through Freshness Control in a Database Cluster

by Cécile Le Pape , Stéphane Gançarski , Patrick Valduriez - In Int. Conf. On Cooperative Information Systems (CoopIS , 2004
"... Abstract. We consider the use of a cluster system for managing autonomous databases. In order to improve the performance of read-only queries, we strive to exploit user requirements on replica freshness. Assuming mono-master lazy replication, we propose a freshness model to help specifying the requ ..."
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Abstract. We consider the use of a cluster system for managing autonomous databases. In order to improve the performance of read-only queries, we strive to exploit user requirements on replica freshness. Assuming mono-master lazy replication, we propose a freshness model to help specifying

Replica Refresh Strategies in a Database Cluster

by Cecile Le Pape, Stephane Gancarski, Patrick Valduriez - in "Journées Bases de Données Avancées (BDA05 , 2005
"... We consider the use of a cluster system for managing autonomous databases. In order to improve the performance of read-only queries, we study the impact of refresh strategies on the query response time. Assuming mono-master lazy replication, we propose a model for refresh strategies and a workload g ..."
Abstract - Cited by 1 (0 self) - Add to MetaCart
on the workload conflict rate (ratio of queries conflicting with running update transactions) and on the level of freshness required by transactions.

Fine-Grained Replication and Scheduling with Freshness and Correctness Guarantees

by Fuat Akal, Yuri Breitbart, Torsten Grabs, Lourens Veen - in Proceedings of the 31st International Conference on Very Large Data Bases (VLDB’05 , 2005
"... Lazy replication protocols provide good scalabil-ity properties by decoupling transaction execution from the propagation of new values to replica sites while guaranteeing a correct and more efficient transaction processing and replica maintenance. However, they impose several restrictions that are o ..."
Abstract - Cited by 16 (2 self) - Add to MetaCart
that are often not valid in practical database settings, e.g., they require that each transaction executes at its initiation site and/or are restricted to full replica-tion schemes. Also, the protocols cannot guaran-tee that the transactions will always see the fresh-est available replicas. This paper presents a

A Fresh Look at the Reliability of Long-term Digital Storage

by Mary Baker, Mema Roussopoulos, Mehul Shah, Petros Maniatis, Prashanth Bungale, TJ Giuli, David S. H. Rosenthal , 2006
"... Emerging Web services, such as email, photo sharing, and web site archives, must preserve large volumes of quickly accessible data indefinitely into the future. The costs of doing so often determine whether the service is economically viable. We make the case that these applications' demands on ..."
Abstract - Cited by 52 (6 self) - Add to MetaCart
it cheaper and faster, and increasing the independence of data replicas.

Update Propagation Strategies to Improve Freshness of Data in Lazy Master Schemes

by Esther Pacitti, Esther Pacitti, Eric Simon, Eric Simon, Projet Rodin - VLDB Journal , 1997
"... : Many distributed database applications need to replicate data to improve data availability and query response time. The two-phase-commit protocol guarantees mutual consistency of replicated data but does not provide good performance. Lazy replication has been used as an alternative solution. In th ..."
Abstract - Cited by 38 (1 self) - Add to MetaCart
. In this case, mutual consistency is relaxed and the concept of freshness is used to measure the deviation between replica copies. In this paper we present a framework for lazy replication and focus on a special replication scheme called lazy master. In this scheme the common update propagation strategy used

Fine-Grained Lazy Replication with Strict Freshness and Correctness Guarantees

by Fuat Akal, Can Türker, Hans-jörg Schek, Yuri Breitbart, Fuat Akal, Can Türker, Hans-jörg Schek, Yuri Breitbart, Fuat Akal, Can Türker, Hans-jörg Schek - In Proc. International Conference on Very Large Data Bases (VLDB , 2004
"... Eager replication management is known to generate unacceptable performance as soon as the update rate or the number of replicas increases. Lazy replication protocols tackle this problem by decoupling transaction execution from the propagation of new values to replica sites while guaranteeing a corre ..."
Abstract - Cited by 2 (1 self) - Add to MetaCart
Eager replication management is known to generate unacceptable performance as soon as the update rate or the number of replicas increases. Lazy replication protocols tackle this problem by decoupling transaction execution from the propagation of new values to replica sites while guaranteeing a

Refresco: Improving Query Performance through Freshness Control in a Database Clus- ter

by Cécile Le, Pape Stéphane, Gançarski Patrick Valduriez
"... ABSTRACT. We consider the use of a cluster system for managing autonomous databases. In order to improve the performance of read-only queries, we strive to exploit user requirements on replica freshness. Assuming mono-master lazy replication, we propose a freshness model to help specifying the requi ..."
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ABSTRACT. We consider the use of a cluster system for managing autonomous databases. In order to improve the performance of read-only queries, we strive to exploit user requirements on replica freshness. Assuming mono-master lazy replication, we propose a freshness model to help specifying
Results 1 - 10 of 60