BUKU ABSTRAK - Universiti Putra Malaysia

Science, Technology & Engineering
Keywords: Pineapple, peeler and corer, slicer, dicer
Quorum-based Data Replication in Data Grid
Dr. Rohaya Latip
Hamidah Ibrahim
Faculty of Computer Science and Information Technology, University Putra Malaysia,
43400 UPM Serdang, Selangor, Malaysia.
+603-8946 6536; rohaya@fsktm.upm.edu.my
Replication is a useful technique for distributed database systems and can be implemented in a grid
computation environment to provide a high availability, fault tolerant, and enhance the performance of the
system. This research discusses a new protocol named Enhanced Diagonal Data Replication in 2D Mesh structure
(EDR2M) protocol where the performance addressed are communication cost and data availability which are
compared with the previous replication protocols, Diagonal Data Replication in 2D Mesh structure (DR2M).
EDR2M protocol is organized in a logical two dimensional mesh structure and by using quorums and voting
techniques to improve the performance of communication cost and data availability of the replication protocol
where it reduces the number of copies of data replication for read or write operations. The data file is copied at the
selected node of the diagonal site in a quorum of the network. Selecting the middle node and grouping the nodes
in quorum have reduced the communication cost and high in availability since all nodes have the equal number
of requests and data accessing in the network. The algorithm in this paper also calculates the best number of
nodes in each quorum and how many quorums are needed for N number of nodes in a network. EDR2M protocol
also ensures that the data for read and write operations is consistent, by proofing that the quorum must not have
a nonempty intersection quorum. To evaluate EDR2M protocol, we developed a simulation model in Java. Our
results prove that EDR2M protocol improves the performance of the communication cost and data availability
compare to the previous data replication protocol, DR2M.
Keywords: Data grid, grid computing, replica control protocol
Pineapple Multi-peeler Plus
Dr. Rosnah Shamsudin
Johari Endan and Siti Zaharah Mustapa
Faculty of Engineering, University Putra Malaysia,
43400 UPM Serdang, Selangor, Malaysia.
+603-8946 6366; rosnahs@eng.upm.edu.my
Pineapple Multi-peeler Plus machine was designed and constructed based on three major functions, which
are peeling and coring, slicing, and dicing. It was designed and developed to overcome the issues faced in current
pineapple machine. This machine is affordable, suitable for domestic uses, as well as for application in the
pineapple processing industry. It is not only capable of saving energy and time but also ensures a hygienic
process. This machine is made from stainless steel. Pineapple with a height of 145 mm is placed at the peeler
and corer to remove the skin and core to obtain the pineapple flesh. Then the pineapple is sliced using slicer and
finally diced using pineapple dicer. Depending on the industrialists’ preferences, Pineapple 3 in 1 machine can be
operated either manually or automatically.
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