caching

问题 I've seen there is a plenty of them. NCache, Velocity and so forth but I haven't found a table comparing them. What's the best considering the following criterias: Easy to understand. Is being maintained lately. Is free or has a good enough free version. Works. 回答1: I can't speak for what's best or worst, but I'll throw in my experience with NCache in case it helps. Disclaimer: NHibernate and I had some disagreements, we have since gone our separate ways :) The Good The performance was great

问题 I'm developing a web application using Spring MVC and I'm using using spring's cache abstraction with Redis to cache my database queries. But I am not able to create multiple cache stores using @Cacheable . @Cacheable("acache") public String atest(int i) { return "a"; } @Cacheable("bcache") public String btest(int i) { return "b"; } ... ... String s = atest(1); String r = btest(1); Using redis, both s and r have the same value " a ". Even though I cache the two methods in different caches, it

问题 I'm working on an ASP.NET MVC project and I've come to the point where I want to start considering my caching strategy. I've tried to leave my framework as open as possible for the use in caching. From what I heard during Scott Hanselman's podcast StackOverflow.com uses page output caching and zips that content and puts it into RAM. This sounds like this would be great for user-wide cache but for something like personalized pages you would have to cache a version for each user and that could

问题 I am looking for a data structure that operates similar to a hash table, but where the table has a size limit. When the number of items in the hash reaches the size limit, a culling function should be called to get rid of the least-retrieved key/value pairs in the table. Here's some pseudocode of what I'm working on: class MyClass { private Map<Integer, Integer> cache = new HashMap<Integer, Integer>(); public int myFunc(int n) { if(cache.containsKey(n)) return cache.get(n); int next = . . . ;

问题 In development, the following (simplified) statement always logs a cache miss, in production it works as expected: @categories = Rails.cache.fetch("categories", :expires_in => 5.minutes) do Rails.logger.info "+++ Cache missed +++" Category.all end If I change config.cache_classes from false to true in config/development.rb, it works as well in development mode, however, this makes development rather painful. Is there any configuration setting that is like config.cache_classes = false except

问题 I have a page that loads a lot of images, css and javascript. I've added a far future Expires header and set Cache-Control to public on these external dependencies so they should be cached. But every time I do a Post/Redirect/Get chrome tries to load these again. This behavior is very similar to reloading the page. I've added ETags and handle the If-None-Match header which helps a bit, but it still generates too many useless requests. How do I tell chrome and safari to get the files from

问题 Under what conditions will the browser cache files? Sometimes it does, sometimes it doesn't. If no one here knows, my next step will be to test the various file format, file size, and htaccess scenarios. If you don't know, can you think of any other variables that you'd recommend testing? Thanks in advance! 回答1: The following works to instruct the browser to cache the files. The last line was necessary to make the server deliver webm files with the correct header MIME type. # Expires is set

问题 I am deleting a single path from the Django cache like this: from models import Graph from django.http import HttpRequest from django.utils.cache import get_cache_key from django.db.models.signals import post_save from django.core.cache import cache def expire_page(path): request = HttpRequest() request.path = path key = get_cache_key(request) if cache.has_key(key): cache.delete(key) def invalidate_cache(sender, instance, **kwargs): expire_page(instance.get_absolute_url()) post_save.connect

问题 I had some configuration issues in my local.xml , which I cannot load my magento frontend nor my admin panel, then I fixed the issue I had in my local.xml , and to get my new config to be loaded, I deleted everything in /var/cache and even whats there in /var/session folders. But to my surprise Magento still loads the old local.xml settings. I tried with restarting apache and cleared my browser cache, nothing works. Any ideas?? 回答1: To make changes in core configurations and have them stick

问题 I had some configuration issues in my local.xml , which I cannot load my magento frontend nor my admin panel, then I fixed the issue I had in my local.xml , and to get my new config to be loaded, I deleted everything in /var/cache and even whats there in /var/session folders. But to my surprise Magento still loads the old local.xml settings. I tried with restarting apache and cleared my browser cache, nothing works. Any ideas?? 回答1: To make changes in core configurations and have them stick