NDLI: Dynamic Random Access for Hadoop Distributed File System

Content Provider	IEEE Xplore Digital Library
Author	Wei Zhou Jizhong Han Zhang Zhang Jiao Dai
Copyright Year	2012
Abstract	Recently, Hadoop Distributed File System (HDFS) has been widely used to manage the large-scale data due to its high scalability. HDFS can natively support sequential queries, which are the most common queries in the applications. However, there still exist many applications that need to apply random queries of large-scale data. So the random queries in large-scale data are becoming more and more important. Unfortunately, the HDFS is not optimized for random reads, hence there are many disadvantages in random access to HDFS. In this paper, we present three methods to solve these issues, which can optimize the random accesses to HDFS and guarantee the sequential access performance at the same time. The methods are as follows: 1) proposing dynamic methods to set the size of data packet in transmission, 2) reusing the TCP connections in localized random accesses, 3) transferring the random accesses to the same server to make full use of the TCP connections. Experimental evaluations based on real world data show that our works are effective and our solutions efficiently support sequential access and random access compared to the original methods.
Starting Page	17
Ending Page	22
File Size	513458
Page Count	6
File Format	PDF
ISBN	9781467314237
ISSN	15450678
e-ISBN	9781467314237
DOI	10.1109/ICDCSW.2012.74
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-18
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Servers Optimization Protocols File systems Distributed databases Scalability Data models transfer model dynamic setting random access
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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