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A task-level flow scheduling method in data center

A data center network and central scheduling algorithm technology, applied in data exchange networks, digital transmission systems, electrical components, etc., can solve problems such as inability to guarantee completion, and achieve the effect of improving throughput, saving network resources, and avoiding task transmission failures.

Active Publication Date: 2017-11-14
TSINGHUA UNIV
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  • Claims
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Problems solved by technology

However, most applications in the current data center network obey the Partition-Aggregate structure. A task in the network contains multiple network flows. If one flow can be completed before the deadline, it does not guarantee that all the flows in the task can be completed before the deadline.

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  • A task-level flow scheduling method in data center

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Embodiment Construction

[0021] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings.

[0022] The present invention proposes a task-level flow scheduling method in a data center network, the main goal of which is to maximize the number of tasks completed before a deadline. The priority of the network flow is determined by the deadline of the network flow and the size of the network flow. At the same time, the higher priority network flow should be processed and transmitted first, which means that the higher priority flow can preempt the lower priority flow. bandwidth of the stream. In order to reduce the average network flow completion time, at most one network flow can be transmitted on a link at a time. This means that when a network flow starts to transmit, this network flow will monopolize the entire link bandwidth.

[0023] Steps of the present invention specifically include:

[0024] (1) When a new task arrives at the sending server, the n...

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Abstract

The invention belongs to the field of data center networks, and in particular relates to a task-level flow scheduling method in a data center, comprising: adding an SDN controller to the data center network, and encapsulating the network flow information of the task after a server receives a new task into the message, and send the encapsulated information message to the SDN controller; the SDN controller runs the central scheduling algorithm to judge whether the task should be received or discarded; for the received task, the SDN controller according to the central scheduling algorithm Calculate the result, send the routing table entry of the task to the intermediate switch, and send the transmission time slice of the task to the corresponding server at the same time. The invention enables the emergency network flow to be dispatched in priority so as to be completed before the deadline, improves the network throughput rate, reduces the average network flow transmission time, and realizes the maximization of the number of tasks completed before the deadline.

Description

technical field [0001] The invention belongs to the field of data center networks, and in particular relates to a task-level flow scheduling method in a data center. Background technique [0002] Data center network is an important direction of today's network research. With more and more delay-sensitive applications in the field of data center network, the requirements of data center network for transmission delay are increasing. In order to transmit network traffic more efficiently, so that the network flow can be transmitted before the deadline, the research on reasonable scheduling of network flow combined with the deadline information of network flow is attracting more and more attention from academia and industry. In the traditional data center network, the traditional transmission control protocol TCP is generally used. However, the average bandwidth allocation mechanism of TCP is not suitable for the delay-sensitive data center network. Some urgent network flows are ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/865H04L29/06H04L47/6275
Inventor 刘莉莉李丹吴建平
Owner TSINGHUA UNIV
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