caching

Cache SHA1 digest result?

I'm storing several versions of a file based on a digest of the original filename and its version, like this: $filename = sha1($original . ':' . $version); Would it be worth it to cache the digest ($filename) in memcache as a key/value pair (the key being the original + version and value the sha1 hash), or is generating the digest quic...

Would dynamically created JavaScript files be cached?

So my application uses a LOT of js files. thats a lot of http requests. I decided to combine them dynamically at the server in packs of 3-4 files clubbed by functionality. My client side request is: ...script type="text/javascript" src="http://mydomain.com/core-js.php" ... My server side does: --core-js.php-- header("Content-type: ap...

How can I clear the cache in an Outlook client programmatically?

I am executing the following routine often in order to clear the local cache of many Outlook clients (Outlook 2003) in order to fix corrupted Forms stored on the users local drive. On the Tools menu, click Options, and then click the Other tab. Click Advanced Options. In the Advanced Options box, click Custom Forms. In the Custom Fo...

De-normalization alternative to specific MYSQL problem?

I am facing quite a specific optimization problem. I currently have 4 normalized tables of data. Every second, possibly thousands of users will pull down up-to-date info from these tables using AJAX. The thing is that I can predict relatively easily which subset of data they need... The most recent 100 or so entries in those 4 normali...

UIWebView NSURLRequestReloadIgnoringLocalCacheData doesn't actually ignore the cache

I have a UIWebView object, with the caching-policy specified as: NSURLRequestReloadIgnoringLocalCacheData This should ignore whatever objects are in the local cache and retrieve the latest version of a site from the web. However, after the first load of the site (ten resources in trace, HTTP GET), all subsequent loads of the site only ...

How to handle media kept on a separate server (PHP)

So, I have three server, and the idea was to keep all media (images, files, movies) on a media server. I never got around to do it but I think I probably should. So these are the three servers: WWW server DB server Media server Visitors obviously connect to the WWW server and currently image resizing and cache:ing is done on the WWW s...

Combining Session and Cache

To make my extranet web application even faster/more scalable I think of using some of the caching mechanisms. For some of the pages we'll use HTML caching, please ignore that technique for this question. E.g.: at some point in time 2500 managers will simultaneously login on our application (most of them with the same Account/Project) ...

atomic writes to ehcache

Context I am storing a java.util.List inside ehcache. Key(String) --> List<UserDetail> The ordered List contains a Top 10 ranking of my most active users. Problem Concurrent 3rd party clients might be requesting for this list. I have a requirement to be as current as possible with regards to the ranking. Thus if the ranking is chan...

How does the proc in the caches_action if clause get execute

I have a newbie kind of question which I cant get my head around. How does the Proc in the if condition of the caches_action get executed for the caches_action method. for example caches_action :show, :if=>Proc.new{|x| something} what i dont get its how does this get called. I know i can execute a proc defined as proc= Proc.new by...

Serialization for memcached

I have this huge domain object(say parent) which contains other domain objects. It takes a lot of time to "create" this parent object by querying a DB (OK we are optimizing the DB). So we decided to cache it using memcached (with northscale to be specific) So I have gone through my code and marked all the classes (I think) as [Serializa...

Very long strings as primary keys in a database for caching

Hi, I am working on a web app that allows users to create dynamic PDF files based on what they enter into a form (it is not very structured data). The idea is that User 1 enters several words (arbitrary # of words, practically capped of course), for example: A B C D E There is no such string in the database, so I was thinking: Stor...

When should I open and close a website's cached WCF proxy?

I've browsed around the other articles on StackOverflow that relate to caching WCF proxies for reuse, and I've read this article explaining why I should explicitly open the proxy before calling anything on it. I'm still a little hazy on the best implementation details. My question is: when should I open and close proxies for service ca...

Caching page by parts; how to pass variables calculated in cached parts into never-cached parts?

Hello, Let's imagine that I have a code like this... if (!$data = $cache->load("part1_cache_id")) { $item_id = $model->getItemId(); ob_start(); echo 'Here is the cached item id: '.$item_id; $data = ob_get_contents(); ob_end_clean(); $cache->save($data, "part1_cache_id"); } echo $data; echo never_cache_function($item_id); ...

caching static files for ruby on rails application using nginx

I have been trying for some time to serve & cache static files for my rails app using nginx. the rails app server runs mongrel_cluster and is deployed on a different host than that of nginx. following many of the available discussions I tried the following server { listen 80; server_name www.myappserver.com; ...

Powershell command for removing items from Appfabric cache

Are there powershell commands to: Get a list of items in the cache Remove a particular item Remove all items Change the value for a particular key I haven't come across a nice blog or tutorial for beginners to get started with Appfabric caching administration. Thanks! ...

Concurrent WCF calls via shared channel

I have a web tier that forwards calls onto an application tier. The web tier uses a shared, cached channel to do so. The application tier services in question are stateless and have concurrency enabled. But they are not being called concurrently. If I alter the web tier to create a new channel on every call, then I do get concurrent ca...

Simple Data Caching using Weak References in WCF

Given that I have the following WCF service: class LookUpService { public List<County> GetCounties(string state) { var db = new LookUpRepository(); return db.GetCounties(state); } } class County { public string StateCode{get;set;} public string CountyName{get;set;} public int CountyCode{get;set;} } ...

cached data base

hi , in my project i need a tow tables each of it has about 2000 row , i want my application to be speed so my db should load into memory (cached) when the app start and before it close the db have to be saved on the disk . i am using java and i want to use sql ...

Clearing TortoiseSVN authentication cache from the command line

TortoiseSVN is nice for the most part, but one thing that blows in a team development situation where more than one person is using a particular PC is the authentication. When I'm working on stuff, I like to save my credentials so that I don't need to keep entering it in for logging, branching, committing, etc. The problem is that I al...

JCS JDBC Cache is not being invalidated when invalidate is called from another web application

I have 2 java web applications: The first called runtime and the second called editor The runtime application is using JCS MySql cache In certain scenarios, I need to invalidate the cache from the editor application. When I am doing it, I can see that the entries are being deleted from the MySql however the runtime application is still ...