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en:bandwidth [2019/09/09 09:04] admin [How to know the size of a file?] |
en:bandwidth [2021/08/25 10:29] (current) |
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| - | ====== How to bandwidth is used by zebrix? ====== | + | ====== How bandwidth is used by zebrix? ====== |
| ===== Definition of bandwidth ===== | ===== Definition of bandwidth ===== | ||
| * The term « bandwidth » represents the amount of data a network connection can transfer each second. | * The term « bandwidth » represents the amount of data a network connection can transfer each second. | ||
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| * Thanks to this value, it is possible to estimate the transfer duration for a given file on a network. | * Thanks to this value, it is possible to estimate the transfer duration for a given file on a network. | ||
| * The size of a file commonly expressed in kilobytes, megabytes and gigabytes (please note that 1 bytes = 8 bits) | * The size of a file commonly expressed in kilobytes, megabytes and gigabytes (please note that 1 bytes = 8 bits) | ||
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| + | ===== Minimal recommended bandwidth ===== | ||
| + | 1 Mbit / s per screen is recommended. However, a fast bandwidth allows faster transfer of files. A lower bandwidth can be satisfying also, depending on the usage. We noticed that low bandwidth (<512 kbit / s) with big latency (e.g. GPRS / EDGE / Slow 3G) can cause connection instabilities. | ||
| + | ===== When the media transfert to the screen will occur? ===== | ||
| + | The content is downloaded when screens actuality need it, usually when starting the first reading of the contents, when installing a new screen in a store, or when new content is loaded on zebrix. You can also specify a night time to pre-send contents to screens before the first display. This would save bandwidth during the day. | ||
| + | ===== What is the volume of data that will be used by zebrix screens? ===== | ||
| + | Required data usage his is impossible to estimate, it depends on the type and number of media broadcasted on the screens. In all cases, zebrix uses compressed and optimized formats for both video and images, which limits the use of bandwidth. In addition to these media, there are also remote control flows of the screens, which represent only a few Mo per day, at most. | ||
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| ===== Common file size in digital signage projects ===== | ===== Common file size in digital signage projects ===== | ||
| Size of image and video files that you will broadcast on your screens will vary depending on the quality of the image, the resolution (dimensions), and the duration (for videos). | Size of image and video files that you will broadcast on your screens will vary depending on the quality of the image, the resolution (dimensions), and the duration (for videos). | ||
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| * Changing a schedule | * Changing a schedule | ||
| * … | * … | ||
| + | ====== Reduce the bandwidth usage thanks to the zebrix cachebox ====== | ||
| + | The zebrix cachebox is an additional device that is installed on premise that acts as a cache server for contents (images and videos). The usage of the cachebox in intended to reduce the bandwidth and data volume usage. When a screen is configured to use the cachebox, it will first try to download it from the cachebox that will supply the content to the screen. If the cachebox is not available, the screen will fall back to a mode which allows it to download from the zebrix datacenter directly (as standard setup). When many screens a same location request same files, these files are only downloaded one time from the internet. The cachebox can be installed on site where many screens are located or in the headquarter or both. | ||
| ====== Conclusion ====== | ====== Conclusion ====== | ||
| When a content is set to a screen or a group of screens from zebrix, the transfer of every required files starts instantly to targeted screens, however, the content will only be displayed on screens when the content is completely transferred. | When a content is set to a screen or a group of screens from zebrix, the transfer of every required files starts instantly to targeted screens, however, the content will only be displayed on screens when the content is completely transferred. | ||
