NDN 파일 시스템에서의 병목현상 감소 방안
Reducing File Operation Overhead of NDN File Systems
- 주제(키워드) Future Internet , Repository , NDN , CCN
- 발행기관 아주대학교
- 지도교수 고영배
- 발행년도 2017
- 학위수여년월 2017. 2
- 학위명 석사
- 학과 및 전공 일반대학원 소프트웨어특성화학과
- 실제URI http://www.dcollection.net/handler/ajou/000000024333
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Named data networking (NDN) has been researched to be a substitute of the conventional IPv4 Internet. Its advantages are strong security, in-network caching, and mobility support. In terms of network architecture, it emphasizes contents rather than its locations to access data after the consumer’s interest is routed at each node. In contrast to many NDN researches on routing, node architecture, caching, security, and other research domains, there has been a little effort on the design and architecture development of NDN based repository and its file system to save contents efficiently. So far, there are two NDN repositories, such as NDNFS and Repo-ng. They are designed to store files in NDN way so that data is sent and received over NDN network more efficiently. However, its biggest problem is the overhead when they run at I/O intensive environment, such as serving science-modelling data, which is large, sometimes over 3GB. In the performance evaluation of this paper, the extent of its severity is depicted. Moreover, the investigations on those architectures will help one notice the source of the overhead. According to our findings, an enhanced metadata scheme and its management strategy will be put forward to alleviate this problem. Furthermore, some of the implementation considerations for the NDN based distributed file system for I/O intensive environment will be discussed.
more목차
CONTENTS
CHAPTER 1 INTRODUCTION １
1.1 Motivation １
1.2 Overview of the Dissertation 4
CHAPTER 2 BACKGROUND AND PROBLEM STATEMENT 5
2.1 NDNFS 5
2.2 Repo-ng 7
CHAPTER 3 ENHANCED SCHEME FOR NDN REPOSITORY 10
3.1 Observations on SQLite table 10
3.2 Problems of SQLite and its DB tables 12
3.3 Metadata management with xattr 13
3.4 Avoiding Signature Write 14
CHAPTER 4 PERFORMANCE EVALUATION 15
CHAPTER 5 CONCLUSIONS 20
