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A hybrid caching method for streaming video on demand copy based on cloud server group

A cloud server and video-on-demand technology, which is applied in the field of cloud storage, can solve the problem of low cache space utilization and achieve the effects of avoiding copying and deletion, increasing hit rate, and improving utilization rate

Inactive Publication Date: 2016-07-13
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] Purpose of the invention: This invention mainly solves the problem of low cache space utilization when multiple copies are placed, improves the on-demand hit rate, speeds up the on-demand response, and self-adaptively smooths the problem of the influence of changes in video popularity

Method used

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  • A hybrid caching method for streaming video on demand copy based on cloud server group
  • A hybrid caching method for streaming video on demand copy based on cloud server group
  • A hybrid caching method for streaming video on demand copy based on cloud server group

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Embodiment Construction

[0098] A copy hybrid caching strategy for streaming video-on-demand based on a cloud server group, including the following content:

[0099] Content 1, according to figure 1 data, a new dynamic prefix chunking method based on video duration is proposed. Depend on figure 1 It can be seen that the shorter the duration of the video, the greater the proportion of it being watched by the user; on the contrary, the longer the duration of the video, the greater the probability of interruption in the middle.

[0100] Dynamic prefix chunking of video copies based on video duration. Provide n video programs V={V 1 , V 2 , V 3 ,...,V n}, its video duration set is T, T={T 1 ,T 2 , T ３ ,...,T n}, each video copy dynamic prefix block set in video V is P, P={P 1 , P 2 , P 3 ,...,P n}.

[0101] For the video copy to be chunked, get the video duration. When the video duration is 0-1000 (sec), the video copy is prefixed with the full video.

[0102] When the video duration is 1...

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Abstract

The invention discloses a method for efficiently caching a video copy of streaming media video on demand in a cloud server group. The method performs dynamic partitioning of the prefix of the video copy based on the video duration, and adopts a mixed storage strategy of dynamic prefix and complete copy to improve system efficiency. To improve the quality of user experience, this method first determines the number of copies required based on factors such as video popularity, and determines two types of copies based on the on-demand rate: a complete copy and a prefix copy. For the prefix copy, the prefix part is dynamically divided based on the video duration. Generate a prefix copy; when the storage space is sufficient, the copy is placed using a combination of heat balancing and load balancing. When the storage space is insufficient, the video copy whose popularity has been reduced is smoothly deleted based on the time window threshold. The above method can enable users To achieve a better video-on-demand experience.

Description

technical field [0001] The invention relates to a hybrid caching strategy for performing dynamic prefix block division and dynamically performing prefix copy and complete copy on a cloud server group for a copy of a stream media video source file, and belongs to the field of cloud storage. Background technique [0002] Streaming media (especially high-definition video) has the characteristics of large data volume and high real-time requirements. The video copy storage strategy in the streaming video on demand system has a direct impact on the performance of the system. Utilizing cloud server clusters to cache and manage video copies can improve system performance. [0003] The user's video-on-demand behavior is related to network performance. If the user waits for a long time, he will give up the video-on-demand. Studies have shown that streaming video on demand conforms to the long-tail effect, that is, among all video programs, users tend to watch 20% of the video progra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L29/08G06F17/30
Inventor 宋建新张春雨
Owner NANJING UNIV OF POSTS & TELECOMM
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