scholarly journals SIFAT-SIFAT ROLLBACK RECOVERY MENGGUNAKAN UNCOORDINATED CHECKPOINTING BERBASIS CAUSALITY STRENGTH

2018 ◽  
Vol 15 (2) ◽  
pp. 74
Author(s):  
Junianto Sesa
Keyword(s):  
Fault Tolerance ◽  
Rollback Recovery ◽  
Domino Effect ◽  
Alternative Approach ◽  
Tolerance Approach

AbstractFault tolerance approach is the most popular computing application on computer devices in which depends on checkpoint uncoordinated. This alternative approach is based on checkpoint uncoordinated and logging message requiring all records, imposing works, memories and overhead becomes significant to communication. Recent studies have found that many applications on computer are send-determinism which can possibly design a new fault tolerance protocol. Thus, this research uses checkpoint uncoordinated protocol based causality strength, a send-determinism feature to record one part of the messages without restarting the process systematically when the error occurs. By drawing the protocol and proving its validity are required as the effective methods of this research. With this alternative approach, the protocol can functionally work where the only small portion of the message is recorded and domino effect does not occur.Keywords : Causality Strength, Domino Effect, Rollback Recovery, Uncoordinated Checkpointing  AbstrakPendekatan toleransi kesalahan yang paling populer untuk aplikasi komputasi pada perangkat komputer bergantung pada checkpoint uncoordinated. Alternatif pendekatan tersebut berdasarkan pada checkpoint uncoordinated dan logging pesan mengharuskan pencatatan semua pesan, memaksakan pekerjaan memori/penyimpanan tinggi dan overhead yang signifikan pada komunikasi. Baru-baru ini telah diamati bahwa banyak aplikasi pada komputer bersifat send-determinism yang memungkinkan untuk mendesain protokol toleransi kesalahan baru. Sehingga penelitian ini menggunakan protokol checkpoint uncoordinated berbasis causality strength yang bersifat send-determinism yang hanya mencatat satu bagian dari pesan dan tidak perlu me-restart secara sistematis semua proses ketika kegagalan terjadi. Untuk menunjukkan bahwa penelitian ini berjalan sesuai dengan metode yang digunakan yaitu dengan menggambarkan protokol dan membuktikan kebenarannya. Dengan menggunakan pendekatan tersebut, dapat ditunjukkan bahwa protokol ini benar-benar berhasil dimana hanya mencatat sebagian kecil dari pesan dan tidak terjadi efek domino.Kata kunci : Causality Strength, Efek Domino, Rollback Recovery, Uncoordinated Checkpointing

Fault Tolerant Guidance of Under-Actuated Satellite Formation Flying Using Inter-Vehicle Coulomb Force

2019 ◽  
Vol 2 (1) ◽  
pp. 43-52
Author(s):  
Alireza Alikhani ◽  
Safa Dehghan M ◽  
Iman Shafieenejad
Keyword(s):  
Fault Tolerance ◽  
Formation Flying ◽  
Fault Tolerant ◽  
Coulomb Force ◽  
Control Law ◽  
Triangular Form ◽  
Satellite Formation Flying ◽  
Satellite Formation ◽  
Guidance Law ◽  
Tolerance Approach

In this study, satellite formation flying guidance in the presence of under actuation using inter-vehicle Coulomb force is investigated. The Coulomb forces are used to stabilize the formation flying mission. For this purpose, the charge of satellites is determined to create appropriate attraction and repulsion and also, to maintain the distance between satellites. Static Coulomb formation of satellites equations including three satellites in triangular form was developed. Furthermore, the charge value of the Coulomb propulsion system required for such formation was obtained. Considering Under actuation of one of the formation satellites, the fault-tolerance approach is proposed for achieving mission goals. Following this approach, in the first step fault-tolerant guidance law is designed. Accordingly, the obtained results show stationary formation. In the next step, tomaintain the formation shape and dimension, a fault-tolerant control law is designed.

PECA

2011 ◽  
Vol 6 (1) ◽  
pp. 49-58 ◽  
Author(s):  
Maytham Safar ◽  
Hasan Al-Hamadi ◽  
Dariush Ebrahimi
Keyword(s):  
Fault Tolerance ◽  
Power Consumption ◽  
Cluster Algorithm ◽  
The Self ◽  
Wireless Sensor ◽  
Electronic Circuits ◽  
Power Efficient ◽  
Tolerance Approach ◽  
Made In ◽  
Network Power

Wireless sensor networks (WSN) have emerged in many applications as a platform to collect data and monitor a specified area with minimal human intervention. The initial deployment of WSN sensors forms a network that consists of randomly distributed devices/nodes in a known space. Advancements have been made in low-power micro-electronic circuits, which have allowed WSN to be a feasible platform for many applications. However, there are two major concerns that govern the efficiency, availability, and functionality of the network—power consumption and fault tolerance. This paper introduces a new algorithm called Power Efficient Cluster Algorithm (PECA). The proposed algorithm reduces the power consumption required to setup the network. This is accomplished by effectively reducing the total number of radio transmission required in the network setup (deployment) phase. As a fault tolerance approach, the algorithm stores information about each node for easier recovery of the network should any node fail. The proposed algorithm is compared with the Self Organizing Sensor (SOS) algorithm; results show that PECA consumes significantly less power than SOS.

scholarly journals A Comprehensive Study of Load Balancing Approaches in the Cloud Computing Environment and a Novel Fault Tolerance Approach

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 130500-130526
Author(s):  
Muhammad Asim Shahid ◽  
Noman Islam ◽  
Muhammad Mansoor Alam ◽  
Mazliham Mohd Su'ud ◽  
Shahrulniza Musa
Keyword(s):  
Cloud Computing ◽  
Fault Tolerance ◽  
Load Balancing ◽  
Computing Environment ◽  
Cloud Computing Environment ◽  
Tolerance Approach ◽  
Comprehensive Study
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