vod_response_cache
The `vod_response_cache` directive configures the caching behavior for video on demand responses in NGINX-based VOD Packager.
Description
The vod_response_cache directive allows you to control how responses for video on demand are cached by the NGINX server. This directive can take one to three parameters which specify the caching policy, size of the cache, and a duration for which to cache the responses. By utilizing this directive, you can reduce the load on the origin server and enhance the performance of video delivery by ensuring that frequently requested media files are served from the cache. The parameters can be used to fine-tune cache behavior based on application needs, allowing for optimal balancing between freshness of content and server performance.
When the vod_response_cache is enabled, NGINX can determine whether a response should be cached based on the configuration parameters. The directive can help in configuring the maximum cache size and eviction policies for managing how cached items are retained or removed when cache limits are reached. Additionally, caching can significantly improve the overall user experience by minimizing latency, particularly in environments where video content is accessed frequently or in high volume. Furthermore, responses are hashed based on their request properties to ensure that they are accurately retrieved even for varying user requests.
Config Example
server {
location /vod {
vod_response_cache on;
vod_response_cache 10m 30s;
}
}Ensure that the cache size is sufficient to handle your expected traffic; too small a size might lead to increased requests to the origin.
Be cautious with caching dynamic content as it might lead to stale data being served to users.
Test caching behavior extensively in a staging environment to avoid unexpected behavior in production.