worker mod

In my previous article, I introduced the use of Gearman. In my project, I used PHP to write a worker that was running all the time.If according to Gearman official recommendation of the example, just a simple loop to wait for the task, there will be some problems, including: 1, the current code after the modification, how to make the code changes to take effect, 2, restart the worker, how to ensure that the

If you are not familiar with event events, it is recommended to read my previous text javascript: Understanding DOM events. Or look directly below the worker API.First, we need to instantiate a worker object, and the browser will open a new interface based on the newly created Worker object, which will handle the communication between the client and the INDEXEDDB

into several frames, in order to transfer out. There are several benefits to doing so: same as HTTP chunk , the data side can be generated to deliver the message, that is, to improve transmission efficiency. Client APIHere is the API for using WebSocket on the client, syntax is the basic JavaScript, very simple. Only the server-side API, there are a variety of web framework support, such as play, can be self-search.varsocket;$ ("#connect"). Click (Function (Event) {so

Web worker is a JavaScript that runs in the background and does not affect the performance of the page.When you execute a script in an HTML page, the state of the page is not responsive until the script is complete.Web Worker is a JavaScript running in the background, independent of other scripts, without affecting the performance of the page. You can continue to do anything you want to do: Click, select Co

This article mainly helps you understand the worker Event api in JavaScript and have a deep understanding of the worker Event api. If you are interested, you can refer to it, we recommend that you first write this article Understanding DOM events in javascript. First, we need to instance a Worker object. the browser will open a new interface based on the newly c

What is a web worker?We've always emphasized that JavaScript is single-threaded, but the advent of web workers makes JavaScript possible to run on multiple threads, but the Web worker itself is suitable for complex, CPU-intensive operations that cannot manipulate windows, document, Parent object, so essentially JavaScript is a single thread.Here, we just give a simple example, see how the Web

Memcached, I believe we do Linux back-end migrant workers know. Here is a simple analysis of how memcached handles a large number of concurrent connections. As the title, Memcached is a single process program, single process multi-threaded program (Linuxer may smile, this is not a lot of process). Memcached the bottom is libevent to manage the event, let's take a look at how this libevent's classic application works. In fact, the beginning of the memcached is a genuine single process program, in

If you're still using Apache when the whole world is going to be prone to nginx, you might be able to do everything you can to keep speed. You might tweak the modules to be loaded, using keepalive, fiddling with the Content negotiation module (mod_negotiation: Select a document that best matches the client's requirements from several documents), The followsymlinks directive, which allows soft links to be used in this directory, and the ability to rewrite it, you might even put in more hardware a

memory.Worker MPM: This multi-processing module (MPM) enables a network server to support mixed multithreaded multi-process. Because a thread is used to process requests, a large amount of requests can be processed, while the overhead of system resources is less than the process-based MPM. However, it also uses a multi-process, with each process having multiple threads to obtain the stability of the process-based MPM.The number of threads that each process can have is fixed. The server increase

master-worker mode of threading design mode1. The load task supports multiple worker colleagues reading N tasks, supporting concurrency. concurentlinkedlist.2. Load Woker container, no need to consider concurrency, use hashmap3. The load worker returns the result set container. ConcurrenthashmapMaster PackageCom.cmos.ngkm.web.controller.basic;ImportJava.util.Has

when it knows that a thread is used. To use the specified mpm, runconfigureUse Parameters--with-mpm=NAME.NameIs the specified MPM name. We can only specify one of the MPM modules. After compilation, you can use./httpd -lTo determine the selected MPM. This command lists all modules compiled into the server program, including MPM. Unix/Linux supports three types of MPM, prefork, worker, and event. The event model is a test version in apache2.2 and is n

Contributor to Worker Thread pattern: 1. Client (client) participant The client participant creates the request participant and passes it to the channel participant. 2. Channel (Access) Participants The channel participant obtains the request participant from the client participant and passes it to the worker participant. 3. Worker (

In some rare cases, you need to ask user to refresh the Browsser to update the version. Maybe because some secrity issues.As we have the learnt so far. and code change would generate a new service work in the waiting list. UNITL The current service worker completely die (hard refresh or close the window). Then the new service would take control.So why we want to does is when there are a new service work ready, we want to notify user that he or she nee

Apache (HTTPD) has 3 core MPM (multi-processing module, multi-process processing modules) working mode, respectively Prefork,worker and event, The httpd-2.2 event mode is still the model used for testing, while the httpd-2.4 event mode can be used in a production environment. If the HTTPD service is installed through Yum, the configuration files for 3 operating modes are default in /etc/httpd/conf/httpd.conf .Prefork MPM, multi-process model, each pro