caching

问题 I've heard DHH and the other great 37Signal guys talk a lot about Russian Doll Caching and I understand the concept of it, but I don't really know how to apply it to my code. How would you apply it? NEW EDIT: How would you apply the gem to a piece of code with a lot of if statements? <% if signed_in? %> <div class="timeline"> <%= link_to image_tag(current_user.avatar), designer_path(current_user), :class => "avatar topimg" %> <%= content_tag(:span, "your profile", :class => "description") %>

问题 My only fear of using BufferedImage object is that for a very large image of say 60000x32000 it will result in JVM shutting down with OOM on a limited JVM heap space. However, JavaDocs of ImageIO.read method says something about "control caching". What is control caching in this context? Does that mean ImageIO.read uses caching of image on disk for large image? Refer to JavaDocs and ImageIO.read method below: /** * Returns a <code>BufferedImage</code> as the result of decoding * a supplied

问题 I'm trying to develop an API service that after collecting data continuously from different sources, elaborate that data, and keep that information ready from being requested from another service. I'm using Flask and it's working on top of a single thread. My problem is about the slowlines accessing the cached data. The gathering process it works pretty well, but sometimes when I ask for the data the server it's busy because in the meantime it's fetching the data from the sources. How should

问题 I have a few test installments of zend server CE (php5.3), one on Mac 10.8.2, one on Linux EC2 instance, both using the default APC implementation (zend data cache) that comes with the installation. On both machines, I call: apc_store("Installation:1234:lastActivity", "x", 120); Then I call apc_fetch for that key. On the Mac, apc_fetch works. On the Linux, apc_fetch returns FALSE and fails. Now for the weird stuff on the Linux box, a few tests I made: 1. If I remove the last char in the key

问题 I have video's NSdata stored in my cache .I want to play this on AVPlayer (or some other player if ios has) but not able to understand that in which format shoul i convert NSData so that it can be played on AVplayer.I dont want to save it locally and then give filepath's to avplayer to play video. Kindly suggest is there any other way to play video from NSData.I have already spent 3 days on it but coudn't reach to any conclusion.Kindly give your suggestion.Any help or suggestion would be

问题 It seems that during some tests, Firefox will not cache images that are dynamically generated (or loaded from the cache serverside). I tried enabling caching using headers: $expires = 60*60*24*14; header("Pragma: public"); header("Cache-Control: maxage=".$expires); header('Expires: ' . gmdate('D, d M Y H:i:s', time()+$expires) . ' GMT'); But to no avail. I still get a "200 OK" instead of "304 Not Modified". Seeking an answer using the search on Stackoverflow, i discovered a hint by someone

问题 Currently, I use functools ' lru_cache to handle my caching for the function. The problem is that the size of the cache never grows large enough to make use of the LRU (due to the fact that the function never takes in a parameter). Instead, the function, when called, opens up a specific URL and return its contents. Is there a way in which I can specify the 'time to live' cache in which after a certain amount of time/certain amount of calls, it refreshes its cache? 回答1: I don't know of a

问题 I am facing Javascript caching issue even though I append version number in javascript include i.e. I am trying to force browser to load new javascript like <script type="text/javascript" src="/aa/bbb/test.js?v=7"></script> but still I am seeing old javascript being loaded by browser. Can anyone suggest alternative fix for this? Thanks in advance. 回答1: Deactivate the cache in your browser. 来源： https://stackoverflow.com/questions/7770412/javascript-caching-issue

问题 I have a Scenario where i have 2 weblogic servers let say WL1 and WL2 in WL1 i have 2 applications deployed APP1 and APP2 in WL2 i have 2 applications deployed APP3 and APP4 I want to create a infinispan configuration where APP1 from WL1 forms a cluster with APP3 in WL2 and APP2 from WL1 forms a cluster with APP4 in WL2 So i tried using default UDP multicasting and looks like all 4 applications are forming a cluster, so i changed the multicast port to solve this issue but is this the only way

问题 I want to store data into the Cache using EhCache , but if I try to access the data before data has been populated into the Cache, I get NULL POINTER exception . How can I make sure that Data is not read from the cache until and unless data has been stored into the Cache? 回答1: What you are requesting will make cache usage very problematic. If you always block on a missing entry, any eviction or expiry will put you in the same situation as having an empty cache / missing mapping. However,