scholarly journals Implementasi Basisdata Terdistribusi Pada Sistem Kenaikan Gaji Berkala Dinas Infokom Provinsi Maluku

Author(s):  
Anastasya Latubessy ◽  
Ahmad Ashari

AbstrakKemampuan socket yang bekerja pada komunikasi low level dalam melakukan transfer data antar aplikasi, diharapkan dapat diterapkan dalam sistem basis data terdistribusi. Beberapa alasan untuk membangun basis data terdistribusi adalah pemakaian bersama, kehandalan, ketersediaan, dan kecepatan pemrosesan query. Dengan pertimbangan tersebut, instansi-instansi baik pemerintah maupun swasta mulai tertarik untuk menggunakan sistem terdistribusi dalam pengelolaan pekerjaan pada instansinya. Hal ini dijadikan alasan untuk membangun sistem kenaikan gaji berkala otomatis di Dinas Informasi dan Komunikasi (Infokom) Provinsi Maluku. Selain itu, belum adanya sistem terkomputerisasi yang menangani sistem ini. Sistem kenaikan gaji berkala merupakan sistem yang bersifat kritis atau penting karena berhubungan dengan masalah uang, sehingga diperlukan juga sebuah sistem yang fault tolerant.Arsitektur sistem dibangun dengan metode client server yang memanfaatkan socket sebagai middleware dalam proses komunikasi pada jaringan. Menggunakan pendekatan full replica dengan pendekatan file replication using a group untuk menjamin konsistensi data. SQL Statement yang dikirimkan client akan diubah kedalam format XML yang kemudian akan dikirimkan ke kedua basisdata server menggunakan socket. Model redundansi data dan rendundansi proses diatur oleh middleware socket. Hasil yang diperoleh dalam penelitian ini adalah aplikasi socket sebagai middleware yang menangani distribusi data dari aplikasi web client ke basisdata server yang diimplementasikan pada sistem kenaikan gaji berkala otomatis di Dinas Infokom Provinsi Maluku.  Kata kunci— Socket, basisdata terdistribusi, client server AbstractSockets ability to transfer data between application  that work on the low level communication was expected to be implemented in a distributed database system. Some of the reasons for building a distributed database was data sharing, reliability, availability, and query processing speed. With these considerations, both government agencies and private sector became interested to use distributed systems to manage their job at the office. It is used as a reason to build an automated KGB system of Infokom Department in Province of Moluccas. Furthermore, there was no computerized system to handle this system before. Because of it was a critical or important system, then it was requires to build a system that has a fault tolerant capability.The system architecture was built by client server method using sockets as middleware in the process of network communicaton. The system method was used full replica, and used file replication using a group to ensure data consistency. The SQL Statement was sent by the client would be converted into an XML format which then would be sent to the server using a socket. Data redundancy model and process redundancy model managed by socket middleware.The results of this research was a middleware application using socket that handle the distribution of databases from client applications to database server that were implemented on a periodic system of automatic salary increases in the Office of Information and Communication in Province of Moluccas.  Keywords— Socket, distributed database, replication

Author(s):  
HOANG PHAM ◽  
DAVID POTOSKI

A distributed database system often replicates data across its servers to provide a fault-resistant application, which maximizes server availability. Various replication control protocols have been developed to ensure data consistency. In this paper, we develop optimal design methods for the quorum-consensus replication protocol, which (1) maximizes availability of the distributed database systems and (2) minimizes the total system cost by calculating the optimal read quorum and the optimal number of system servers. Several numerical examples and applications are provided to illustrate the results.


2014 ◽  
Vol 490-491 ◽  
pp. 1342-1346 ◽  
Author(s):  
Ainul Azila Che Fauzi ◽  
A. Noraziah ◽  
Wan Maseri Binti Wan Mohd ◽  
A. Amer ◽  
Tutut Herawan

Replication in distributed database is the process of copying and maintaining database objects in multiple databases that make up a distributed database system. In this paper, we will manage fragmented database replication and transaction management for Malaysian Greater Research Network (MyGRANTS) using a new proposed algorithm called Binary Vote Assignment on Cloud Quorum (BVACQ). This technique will combine replication and fragmentation. Fragmentation in distributed database is very useful in terms of usage, efficiency, parallelism and also for security. This strategy will partition the database into disjoint fragments. The result shows that managing replication and transaction through proposed BVACQ able to preserve data consistency. It also increases the degrees of parallelism. This is because by using fragmentation, replication and transaction can be divided into several subqueries that operate on the fragments.


2008 ◽  
Vol 2008 ◽  
pp. 1-13 ◽  
Author(s):  
N. Eva Wu ◽  
Matthew C. Ruschmann ◽  
Mark H. Linderman

Optimal state information-based control policy for a distributed database system subject to server failures is considered. Fault-tolerance is made possible by the partitioned architecture of the system and data redundancy therein. Control actions include restoration of lost data sets in a single server using redundant data sets in the remaining servers, routing of queries to intact servers, or overhaul of the entire system for renewal. Control policies are determined by solving Markov decision problems with cost criteria that penalize system unavailability and slow query response. Steady-state system availability and expected query response time of the controlled database are evaluated with the Markov model of the database. Robustness is addressed by introducing additional states into the database model to account for control action delays and decision errors. A robust control policy is solved for the Markov decision problem described by the augmented state model.


2020 ◽  
Vol 7 (5) ◽  
pp. 440-451
Author(s):  
Sese Tuperekiye E.

In recent years it has been observed that the federal road safety commission FRSC has been having some challenges on how to handle traffic rule and traffic offences committed by road users both commercial and private. Based on the in ability of the FRSC to handle these problems this paper critically looked into the behavioural pattern of the drivers towards traffic rules and offences committed and found that there was a great need for the Organisation to have a good database, that will be able to keep records of traffic offences and offenders, which can be called upon at any time on reference basis. The aim of this study is to create a distributed Federal Road Safety commission traffic offence system that can access data from any state of the Federation. The system consists of a relational database of FRSC variables which could be shared by the various States and Local Government Areas in the country. Each of the local government area will form a website, and the database will be hosted by the server at the Federal Road Safety Commission Head Quarters at Abuja and at the various state capital. . All LGAs will access the database via a distributed network. The client/server distributed network architecture is used in the design and implementation of the system. The system is capable of monitoring all road offences and traffic offenders records at all levelsfrom  any part of the country and generation of reports concerning offenders and also access information from the local government at all times.


2014 ◽  
Vol 13 (9) ◽  
pp. 4859-4867
Author(s):  
Khaled Saleh Maabreh

Distributed database management systems manage a huge amount of data as well as large and increasingly growing number of users through different types of queries. Therefore, efficient methods for accessing these data volumes will be required to provide a high and an acceptable level of system performance.  Data in these systems are varying in terms of types from texts to images, audios and videos that must be available through an optimized level of replication. Distributed database systems have many parameters like data distribution degree, operation mode and the number of sites and replication. These parameters have played a major role in any performance evaluation study. This paper investigates the main parameters that may affect the system performance, which may help with configuring the distributed database system for enhancing the overall system performance.


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