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Concurrency Control in Mobile Environments: Issues & Challenges

Salman Abdul Moiz, Supriya N.Pal, Jitendra Kumar, Lavanya, Deepak Chandra Joshi, Venkataswamy
2011 International Journal of Database Management Systems  
This paper analyzes and compares various concurrency control strategies in mobile environments proposed in literature.  ...  Transactions requiring the same shared data item may simultaneously perform a write operation leading to inconsistency of data items.  ...  Sequential Order with Dynamic Adjustment (SODA) Strategy SODA [6] guarantees consistency of concurrent transactions in mobile P2P databases.  ... 
doi:10.5121/ijdms.2011.3411 fatcat:b2innmhqsjhmnay25t424ynhvm

Implementing Optimistic Concurrency Control for Persistence Middleware Using Row Version Verification

Martti Laiho, Fritz Laux
2010 2010 Second International Conference on Advances in Databases, Knowledge, and Data Applications  
However, most vendors of relational database management systems implement only locking schemes for concurrency control.  ...  Middleware technology providers recommend the use of Optimistic Concurrency Control (OCC) mechanism to avoid the risk of blocked resources.  ...  Providers of enterprise architecture frameworks (like Java Enterprise Edition (JEE)) and persistence middleware (like object relational mappers) propose to use optimistic concurrency control to avoid the  ... 
doi:10.1109/dbkda.2010.25 dblp:conf/dbkda/LaihoL10 fatcat:lqtf2dnqlfefpjiexfsza5inky


Takeshi Mishima, Hiroshi Nakamura
2009 Proceedings of the VLDB Endowment  
In this paper, we propose Pangea, a new eager database replication middleware guaranteeing snapshot isolation that solves the drawbacks of existing middleware by exploiting the property of the first updater  ...  However, it is a big challenge to propose middleware which can enhance performance and scalability without modification of database servers because the restriction may cause extra overhead.  ...  We proposed a new concurrency control which exploits the first updater wins rule effectively and avoids a hidden deadlock.  ... 
doi:10.14778/1687627.1687747 fatcat:hyo7fpxfmfgtpmivwurld4tbum


Takeshi Mishima, Yasuhiro Fujiwara
2015 Proceedings of the 2015 ACM SIGMOD International Conference on Management of Data - SIGMOD '15  
To efficiently address the hot spot problem, we propose a middleware approach called Madeus that conducts database live migration.  ...  Unfortunately, a hot spot can lead to violation of service level agreements and destroy customer satisfaction.  ...  If all dependencies of database R m are also mirrored on database R s , database R s achieves consistency with database R m . We assume that databases R m and R s are consistent at first.  ... 
doi:10.1145/2723372.2724578 dblp:conf/sigmod/MishimaF15 fatcat:fmql5lerufb2pfyaill73hdo7y

Adaptive Middleware for Data Replication [chapter]

Jesús M. Milan-Franco, Ricardo Jiménez-Peris, Marta Patiño-Martínez, Bettina Kemme
2004 Lecture Notes in Computer Science  
An extensive performance analysis shows that the proposed adaptive replication solution can provide high throughput, good scalability, and low response times for changing loads and workloads with little  ...  Its novelty lies in combining load-balancing techniques with feedback driven adjustments of multiprogramming levels (number of transactions that are allowed to execute concurrently).  ...  Adaptive MPL Implementation Middle-R implements this approach with all proposed optimizations at the middleware layer by controlling the connection pool.  ... 
doi:10.1007/978-3-540-30229-2_10 fatcat:kcsfmacrejeqrhjkgdyw2uzcce

A Multi-Agent Framework for Testing Distributed Systems

Hany El Yamany, Miriam M. Capretz, Luiz Capretz
2006 30th Annual International Computer Software and Applications Conference (COMPSAC'06)  
Software testing is a very expensive and time consuming process. It can account for up to 50% of the total cost of the software development. Distributed systems make software testing a daunting task.  ...  Web-based application is examined as a case study to validate the proposed framework.  ...  The second one -Middleware Controller Agent (MCA) -is located at the middleware and is the kernel of the proposed framework.  ... 
doi:10.1109/compsac.2006.98 dblp:conf/compsac/YamanyCC06 fatcat:yslf4j6cwbczfmqfmrg6fkwhmq

A Strategy to prioritize the waiting transactions to achieve Concurrency Control in Mobile Environments

Salman Abdul Moiz
2018 International Journal for Research in Applied Science and Engineering Technology  
In this paper a concurrency control mechanisms is proposed which predicts the expected time for execution of transaction and can proceed for transaction execution based on the desired timer value.  ...  The inherent features of mobile environments makes concurrency control in mobile environments a challenging problem.  ...  In this paper a concurrency control methodology suitable for mobile database environments is proposed. The proposed algorithm predicts the time for execution of a transaction.  ... 
doi:10.22214/ijraset.2018.1060 fatcat:b3atxmeg4rczraufmk5zws3itu

Middleware-based fault recovery technique for replicated DRTDBS

Udai Shanker, Pratik Shrivastava
2021 International Journal of Intelligent Information and Database Systems  
In the current paper, middleware has been proposed for recovering the abandoned replica site and synchronising the consistency among replica sites.  ...  Our objective is to propose the recovery algorithm that simultaneously allows the processing of admitted RTTs and recovery of recovering failed replica site.  ...  This database system is also called a traditional database system whose correctness depends upon the logical consistency irrespective of timeliness.  ... 
doi:10.1504/ijiids.2021.10033775 fatcat:p2plszqnszb7tnovoniezbrffm

Managing Multiple Isolation Levels in Middleware Database Replication Protocols [chapter]

Josep M. Bernabé-Gisbert, Raúl Salinas-Monteagudo, Luis Irún-Briz, Francesc D. Muñoz-Escoí
2006 Lecture Notes in Computer Science  
However, it also requires a tight coordination among replicas and might generate high abortion rates with some workloads.  ...  So, other isolation levels have also been considered, such as snapshot isolation and cursor stability, but none of the previous works has proposed an overall support for more than one isolation level at  ...  Conclusions This paper has presented a general scheme for designing middleware database replication protocols supporting multiple isolation levels.  ... 
doi:10.1007/11946441_49 fatcat:w737ot4vabg57nzyrpbypjxo7i

pH1: A Transactional Middleware for NoSQL

Fabio Andre Castanheira Luis Coelho, Francisco Miguel Barros da Cruz, Ricardo Manuel Pereira Vilaca, Jose Orlando Pereira, Rui Carlos Mendes de Oliveira
2014 2014 IEEE 33rd International Symposium on Reliable Distributed Systems  
In this work we propose pH1, a generic middleware layer over NoSQL databases that offers transactional guarantees with Snapshot Isolation.  ...  This contrasts with OMID, a previous proposal that takes advantage of HBase's support for multiple versions, with a throughput penalty of 76% in the same conditions  ...  This work was part-funded by project CoherentPaaS: A Coherent and Rich PaaS with a Common Programming Model (FP7-611068) and ERDF-European Regional Development Fund through the COMPETE Programme (operational  ... 
doi:10.1109/srds.2014.23 dblp:conf/srds/CoelhoCVPO14 fatcat:kochkj2ncradxndp2frkkwul64

Extending Middleware Protocols for Database Replication with Integrity Support [chapter]

F. D. Muñoz-Escoí, M. I. Ruiz-Fuertes, H. Decker, J. E. Armendáriz-Íñigo, J. R. González de Mendívil
2008 Lecture Notes in Computer Science  
So, if, in addition to the consistency of transactions and replicas, also the consistency of integrity constraints is to be supported, some more care must be taken.  ...  Current middleware database replication protocols take care of read-write conflict evaluation. If there are no such conflicts, protocols sanction transactions to commit.  ...  Acknowledgments This work has been partially supported by EU FEDER and the Spanish MEC under grants TIN2006-14738-C02 and BES-2007-17362.  ... 
doi:10.1007/978-3-540-88871-0_43 fatcat:omr37fwjbzhuxd3invil3l3eju

Middleware based data replication providing snapshot isolation

Yi Lin, Bettina Kemme, Marta Patiño-Martínez, Ricardo Jiménez-Peris
2005 Proceedings of the 2005 ACM SIGMOD international conference on Management of data - SIGMOD '05  
Many cluster based replication solutions have been proposed providing scalability and fault-tolerance. Many of these solutions perform replica control in a middleware on top of the database replicas.  ...  In such a setting concurrency control is a challenge and is often performed on a table basis.  ...  A main challenge, however, is to coordinate replica control with concurrency control.  ... 
doi:10.1145/1066157.1066205 dblp:conf/sigmod/LinKPJ05 fatcat:d7nk6x2pyrha3mw2squhgt2cvq

Consistent Data Replication: Is It Feasible in WANs? [chapter]

Yi Lin, Bettina Kemme, Marta Patiño-Martínez, Ricardo Jiménez-Peris
2005 Lecture Notes in Computer Science  
We identify the most crucial bottlenecks of the existing protocols, and propose optimizations that alleviate the identified problems.  ...  Recent proposals have shown that database replication providing 1copy-serializability can have excellent performance in LAN environments by using powerful multicast primitives.  ...  In order to allow transactions to execute concurrently, many approaches do concurrency control at the middleware.  ... 
doi:10.1007/11549468_70 fatcat:53ptdocdibhhbh56kqj4ftjrje


Sameh Elnikety, Steven Dropsho, Fernando Pedone
2006 Proceedings of the 2006 EuroSys conference on - EuroSys '06  
Tashkent-MW is a pure middleware solution that combines ordering and durability in the middleware and treats an unmodified database as a black box.  ...  Under high update transaction loads at 15 replicas, we show both Tashkent systems greatly improve scalability and outperform Base by factors of 5 and 3 times, respectively, in throughput with lower response  ...  Willy Zwaenepoel from EPFL for his insightful suggestions and valuable feedback. We also thank the anonymous reviewers for their constructive feedback.  ... 
doi:10.1145/1217935.1217947 dblp:conf/eurosys/ElniketyDP06 fatcat:seis6reftvbhdibpbofaquzgga


Sameh Elnikety, Steven Dropsho, Fernando Pedone
2006 ACM SIGOPS Operating Systems Review  
Tashkent-MW is a pure middleware solution that combines ordering and durability in the middleware and treats an unmodified database as a black box.  ...  Under high update transaction loads at 15 replicas, we show both Tashkent systems greatly improve scalability and outperform Base by factors of 5 and 3 times, respectively, in throughput with lower response  ...  Willy Zwaenepoel from EPFL for his insightful suggestions and valuable feedback. We also thank the anonymous reviewers for their constructive feedback.  ... 
doi:10.1145/1218063.1217947 fatcat:xgsxdw35izeqfdoohp5mprqdeq
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