数据存储在广域网加速系统中的研究与应用
发布时间：2018-10-11 19:23
【摘要】：目前,企业级用户的广域网传输问题主要来自两方面,即链路与应用。链路问题包括带宽受限、网络时延大、丢包率严重等;应用的问题则集中于大数据量的传输,以及应用自身在广域网环境下的低传输效率。 广域网加速技术提供了对以上网络传输和应用交互问题的一整套优化技术。广域网加速技术起源于21世纪初,主要用于解决企业级用户广域网的数据传输及应用访问问题。在广域网加速中有多种技术可以达到加速的目的,论文主要研究基于数据替换与TCP优化技术为基础的广域网加速技术,这两种技术结合起来在广域网加速中的效果明显。在广域网加速技术中,数据存储的地位至关重要,因为加速的原理是通过数据替换实现的,数据替换的基础就是数据存储。发送端发送的数据到达广域网加速系统后,首先被存储起来,然后被存储的数据进行分析,分析后进行数据替换,把大块的数据用少量的特殊索引进行替换,最后把替换后的数据发送到目的地址。在目的网络中,接收到的少量的特殊索引进行反向的查找,找到相应的大块的数据进行还原,还原后发送到目的地址。对于目的地址返回给发送方的信息也是经过同样的流程。从加速的原理可以看出,广域网加速系统主要包含了TCP透明代理模块,用来接收局域网中发送出来的数据,并且把数据需要重新组合成为大块的数据,供替换使用,同时需要能够把替换后的数据重新分片发送出去;特征数据替换模块,主要负责选择数据块进行替换,选择替换的数据块的索引;数据库同步模块,发送端与接收端必须要能保证完整的数据库同步,才能正常的完成替换功能,实现广域网加速的效果。如何有效组织数据存储以及数据的同步,更新等是论文研究的重点。 测试结果表明,文中采用的各种数据结构以及方法可以达到加速的效果,能突破链路的限制,有效的提高多种应用在广域网环境中的传输效率。
[Abstract]:At present, the problem of wide area network (WAN) transmission for enterprise users mainly comes from two aspects: link and application. The link problems include limited bandwidth, large network delay, serious packet loss rate and so on, while the application problems focus on the transmission of large amount of data and the low transmission efficiency of the application in WAN environment. WAN acceleration technology provides a complete set of optimization techniques for the above network transmission and application interaction problems. WAN acceleration technology originated in the beginning of the 21st century, mainly used to solve the problem of data transmission and application access of enterprise wide area network (WAN). There are many kinds of technologies to accelerate the WAN. This paper mainly studies the WAN acceleration technology based on data replacement and TCP optimization technology. The combination of these two technologies is effective in WAN acceleration. In WAN acceleration technology, the position of data storage is very important, because the principle of acceleration is realized by data replacement, which is based on data storage. When the data sent by the sender reaches the WAN acceleration system, it is stored first, then the stored data is analyzed, then the data is replaced, and the bulk of the data is replaced with a small number of special indexes. Finally, the replaced data is sent to the destination address. In the destination network, a small number of special indexes received are searched in reverse, the corresponding chunks of data are found and restored, and then sent to the destination address. Information returned to the sender from the destination address goes through the same process. From the principle of acceleration, we can see that the WAN acceleration system mainly contains TCP transparent proxy module, which is used to receive the data sent out from LAN, and to recombine the data into large pieces of data for replacement. At the same time, we need to be able to send the replaced data back into pieces; the feature data replacement module is mainly responsible for selecting the data block to replace, selecting the index of the replaced data block; the database synchronization module, The sender and receiver must be able to ensure the complete synchronization of the database in order to complete the replacement function normally and realize the effect of WAN acceleration. How to effectively organize data storage and data synchronization and update is the focus of this paper. The test results show that all kinds of data structures and methods used in this paper can achieve the acceleration effect, break through the limitation of link, and effectively improve the transmission efficiency of many applications in WAN environment.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP393.2;TP333
本文编号：2264975
[Abstract]:At present, the problem of wide area network (WAN) transmission for enterprise users mainly comes from two aspects: link and application. The link problems include limited bandwidth, large network delay, serious packet loss rate and so on, while the application problems focus on the transmission of large amount of data and the low transmission efficiency of the application in WAN environment. WAN acceleration technology provides a complete set of optimization techniques for the above network transmission and application interaction problems. WAN acceleration technology originated in the beginning of the 21st century, mainly used to solve the problem of data transmission and application access of enterprise wide area network (WAN). There are many kinds of technologies to accelerate the WAN. This paper mainly studies the WAN acceleration technology based on data replacement and TCP optimization technology. The combination of these two technologies is effective in WAN acceleration. In WAN acceleration technology, the position of data storage is very important, because the principle of acceleration is realized by data replacement, which is based on data storage. When the data sent by the sender reaches the WAN acceleration system, it is stored first, then the stored data is analyzed, then the data is replaced, and the bulk of the data is replaced with a small number of special indexes. Finally, the replaced data is sent to the destination address. In the destination network, a small number of special indexes received are searched in reverse, the corresponding chunks of data are found and restored, and then sent to the destination address. Information returned to the sender from the destination address goes through the same process. From the principle of acceleration, we can see that the WAN acceleration system mainly contains TCP transparent proxy module, which is used to receive the data sent out from LAN, and to recombine the data into large pieces of data for replacement. At the same time, we need to be able to send the replaced data back into pieces; the feature data replacement module is mainly responsible for selecting the data block to replace, selecting the index of the replaced data block; the database synchronization module, The sender and receiver must be able to ensure the complete synchronization of the database in order to complete the replacement function normally and realize the effect of WAN acceleration. How to effectively organize data storage and data synchronization and update is the focus of this paper. The test results show that all kinds of data structures and methods used in this paper can achieve the acceleration effect, break through the limitation of link, and effectively improve the transmission efficiency of many applications in WAN environment.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP393.2;TP333
【引证文献】
相关硕士学位论文 前1条
1 潘驰;基于广域网数据压缩TCP代理的安全性设计与改进[D];南京邮电大学;2013年
，本文编号：2264975
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