![]() In the era of big data and cloud-based applications and storage, wide area networks (WANs) have become increasingly burdened with huge files and massive volumes of data, which can increase packet loss. In real-world conditions, however, it’s common for packets traversing a network to occasionally drop, especially when moving large volumes of data at high speed. ![]() Under ideal situations, a network doesn’t lose data in transit. Have you ever noticed that your average upload and download speeds over the Internet often fail to closely match your available bandwidth? There is a reason for this. But when round-trip time (RTT) of a packet transfer inevitably increases with distance, performance and efficiency suffer. The TCP transfer algorithm proves efficient when data movement occurs over shorter distances and when networks are not congested. At the same time, the protocol will slow down the packet send rate to ensure reliable in-order delivery of packets and to minimize network congestion. Should a receipt acknowledgement not complete within the TCP window, the protocol will retransmit the lost or delayed packet. ![]() As packets are delayed, TCP slows the rate of transmission with a smaller window size that further limits the number of unacknowledged packets allowed.įigure 1 – Diagram showing TCP waits to send each data packet based on receiving acknowledgement from the receiving side. The figure 1 diagram below is a simplified representation that shows the TCP algorithm sending small packets over the network and how the TCP window controls how much data can be transmitted without acknowledgement. To do so, TCP uses an algorithm that establishes a connection between sender and receiver, serially creates transfer requests, and then splits the data into small packets that are individually sent over the network without acknowledgment until it reaches a defined limit of unacknowledged packets (this is referred to as the TCP window). To provide this reliability, TCP will guarantee that application data transmitted within a single TCP connection is delivered to an application at the receiver in the same order that it was sent. Originally developed in the early 1970s when networks were local and data files were small, TCP served as the underlying protocol that enabled data to move efficiently and reliably over LANs with very little bandwidth. Given its relative reliability versus other transport protocols, TCP is the most commonly used IP transport layer, which is used to create connections between specific network systems and applications. The Internet Protocol is the ubiquitous communications protocol for the Internet, serving as the primary means of relaying data across networks that essentially form the Internet. This is due to the inherent limitations of the Internet’s underlying transfer technology called the Transmission Control Protocol (TCP). However, most enterprise tools in use today cannot reliably and securely move large files and data volumes at high speed over global distances. Today, businesses across industries are facing greater challenges moving large files and massive sets of data quickly and reliably between global sites and teams.įailing to meet these challenges can limit an organization’s ability to meet critical business imperatives that yield increased revenues, reduced costs, improved customer service, and new or improved business models.īig data movement can include virtually any number of use cases, such as quickly sending a patient’s genomic sequencing data to a medical expert across the world for critical analysis or securely uploading massive volumes of new video content to online media providers so subscribers have access to the latest movies, music and TV shows.Īs the size and volume of data continues to explode and permeate more business processes and decisions, the speed that data moves over the WAN becomes more crucial. But I can't think of any solution (like how to write multiple chunks on data output stream with correct offset and how to reassemble them at receiving end.Finding a better big data transport solution I was thinking of fragmenting large files into smaller chunks of 1Kb each before sending them to client. ![]() This code does not work for larger files for obvious reasons. It uses Data output stream and readFully() method of data input stream. I have written a small client-server code for transferring small file.
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