caching

问题 Is it possible to cache docker images on Travis CI? Attempting to cache the /var/lib/docker/aufs/diff folder and /var/lib/docker/repositories-aufs file with cache.directories in the travis.yml doesn't seem to work since they require root. 回答1: From a Docker perspective, I think the best way you could do this (without the possibility of running a network local registry) is save the Docker image and cache the exported tar ball. You would need to load that at the start rather than pull an image.

问题 Is it possible to cache docker images on Travis CI? Attempting to cache the /var/lib/docker/aufs/diff folder and /var/lib/docker/repositories-aufs file with cache.directories in the travis.yml doesn't seem to work since they require root. 回答1: From a Docker perspective, I think the best way you could do this (without the possibility of running a network local registry) is save the Docker image and cache the exported tar ball. You would need to load that at the start rather than pull an image.

问题 Assume browser default settings, and content is sent without expires headers. user visits website, browser caches images etc. user does not close browser, or refresh page. user continues to surf site normally. assume the browse doesn't dump the cache for any reason. The browser will cache images etc as the user surfs, but it's unclear when it will issue a conditional GET request to ask about content freshness (apart from refreshing the page). If this is a browser specific setting, where can I

问题 Assume browser default settings, and content is sent without expires headers. user visits website, browser caches images etc. user does not close browser, or refresh page. user continues to surf site normally. assume the browse doesn't dump the cache for any reason. The browser will cache images etc as the user surfs, but it's unclear when it will issue a conditional GET request to ask about content freshness (apart from refreshing the page). If this is a browser specific setting, where can I

问题 I'm developing an application in flutter which is showing videos in a list (like Instagram). Videos must be streamed so I can't download them first and then play them. I want to cache them while they are being streamed. I've seen CacheManager class but it will download the whole file and then pass it to video player to play it. How can I implement a cache manager to show the video file while it is being downloaded to cache folder? 回答1: I might be writing this a bit late but just in case

问题 I'm developing an application in flutter which is showing videos in a list (like Instagram). Videos must be streamed so I can't download them first and then play them. I want to cache them while they are being streamed. I've seen CacheManager class but it will download the whole file and then pass it to video player to play it. How can I implement a cache manager to show the video file while it is being downloaded to cache folder? 回答1: I might be writing this a bit late but just in case

问题 I'm wondering about MESI protocol implementation of writing with the allocation on write miss policy . Let's say that we have write request and got cache miss with no other copies of cache line. This diagram says that the next step is to fetch value from main memory (or L2 cache), store it and mark cache line as M (modified). I suppose then the new value is stored in cache block. The question is: Why we need the step of fetching data from main memory? Why we can't simply write the new value

问题 I'm wondering about MESI protocol implementation of writing with the allocation on write miss policy . Let's say that we have write request and got cache miss with no other copies of cache line. This diagram says that the next step is to fetch value from main memory (or L2 cache), store it and mark cache line as M (modified). I suppose then the new value is stored in cache block. The question is: Why we need the step of fetching data from main memory? Why we can't simply write the new value

问题 I am trying to learn some basics about HTTP. I've inspected a some HTTP response headers and noticed 2 things that confused me: There was no cache-control header and ETag header was present. The way I understood ETag is that, client sends ETag in a requests to a cache, and cache revalidates resources Etag with the server. But if there is no Cache-Control header in response, than all subsequent requests do the revalidation directly with the server and completely omit cache. Is this the case or

问题 I want to know how can okHTTP response from Web server (which returns json data) be cached? I want my app to download all the data needed for RecycleView and cache it once the user runs the app first time - and avoid re-downloading and parsing all the same data from Web server, if data has not changed. I tried to get response headers, but this is what I get: Request URL: https://somedomain.com/wp-json/?categories=3&per_page=100&status=publish Request Method: GET Status Code: 200 OK Remote