problem of large capacity storage and load balancing. Especially suitable for the document as the carrier of online services, such as photo albums, video sites and so on.
The FASTDFS server has two roles: Tracker (tracker) and storage node (storage). The tracker mainly does the dispatching work and plays the role of load balancing on the access.
Storage node sto
Fastdfs Open Source Architecture version of the Chinaunix site in the link address, the moderator is Fastdfs's author
Http://bbs.chinaunix.net/forum-240-8.html
The FASTDFS server has two roles: Tracker (tracker) and storage node (storage). The tracker mainly does the dispatching work and plays the role of load balancing on the access.Storage node storage file
When configuring Fastdfs, modifying the configuration file is a very important step and understanding the meaning of each item in the configuration file is more important, so I refer to the great God's post and organize the explanation of the configuration file. The original post is as follows: Http://bbs.chinaunix.net/thread-1941456-1-1.html, because the original post in the earlier version, so I have to modify the existing version, the original post did not client.conf introduction, here I add
introduction of Fastdfs
Fastdfs is an open source lightweight Distributed File system developed by HAPPY_FISH100, and she manages the files, including file storage, file synchronization, file access (file upload, file downloading), etc., which solves the problem of large capacity storage and load balancing. Especially suitable for the document as the carrier of online services, such as photo albums, video sites and so on. The FASTDFS server has two roles: Tr
Recently, to improve storage performance (mainly write performance) for small files (around 100KB), the idea of using FASTDFS requires a simple test of its performance.
1. Install Fastdfs
Cd/opt mkdir fastdfs cd fastdfs
git clone https://github.com/happyfish100/fastdfs.git
git clone https://github.com/happyfish100/libfastcommon.git
cd/opt/fastdfs/libfastcommon
./make.sh /make.sh Install
cd/opt/fastdfs/fastdfs
./make.sh /make.sh InstallAfter successful installation, Fastdfs
installed in the/
approaching process of swinging constantly. We can try to remove the restriction.
For as unfamiliar, I would like to explain this: enemy._x + = (dx>=0), Enemyspeed:-enemyspeed), in fact, is equivalent to the following sentence:
if (dx >= 0) {enemy._x = enemy._x + enemyspeed;} else {enemy._x = Enemy._x-enemyspeed;}
This is used to determine the direction of the enemy's movement, according to DX dy positive and negative conditions, to determine which direction to move.
OK, so far, I think it
Tracker on token configuration/etc/fdfs/http.conf:
# If use tokens to Anti-steal# default value is False (0)Http.anti_steal.check_token=true# token TTL (Time to live), seconds# Default value is 600Http.anti_steal.token_ttl=60# secret key to generate Anti-steal token# This parameter must is set when Http.anti_steal.check_token set to True# The length of the secret key should not exceed byteshttp.anti_steal.secret_key=fastdfs1234567890# Return the conte
, check typing results at any time;
The way to practice blind play:
The first step: Understanding the keyboard
Small series for everyone to introduce beginners of the simplest is also difficult one--know the keyboard. The keyboard is accessible almost every day, but do you really know the keyboard? Or are you familiar with every keystroke on the keyboard? Below, small series will give you a detailed introduction to the various parts of the keyboard
the hard disk, while also avoiding the capture of user names and passwords by some hacker programs.
iv. Delete. pwl file
There are often password files with the suffix ". PWL" in the Windows directory, and ". PWL" is the transliteration abbreviation for password. For example, there is a security vulnerability in the original Windows 95 operating system where passwords are saved, allowing hackers to easily retrieve passwords stored in PWL files using the appropriate program. This vulnerabilit
When you click the yellow button in the window and press Ctrl + Y, the background color changes to yellow. Multiple event sources call the actionreceivmed () method of the same class.
CTRL + y yellow
CTRL + B green
CTRL + L Black
Related Classes:
public class KeyStrokeextends AWTKeyStroke
A keystroke represents a key action on the keyboard, or equivalent input device.
public abstract class AbstractActionextends Objectimplements Action, Cloneable
How should input methods trigger keyboard events? Does every keystroke trigger an event, or does it trigger an event when the word is finished? How does the whole sentence input trigger the event? Different operating systems and different browsers have different views on this. In the worst case scenario, the browser triggers only one keydown after the user uses the input method, and then there is no keyboard event. This is a big problem for the implem
window. It's "Everything's OK"-suddenly a new traceable data can be sent out at any time without any knowledge of the user, and even the user is not aware that it could happen. Every keystroke, every mouse move, every click of the mouse, every pause, can be captured and sent to the Web server, and you do nothing about it.
Second, XMLHttpRequest: Advantages and disadvantages
Just as many technologies have advantages and disadvantages, the purpose o
data can be sent out at any time without any knowledge of the user, and even the user is not aware that it could happen. Every keystroke, every mouse move, every click of the mouse, every pause, can be captured and sent to the Web server, and you do nothing about it.
Second, XMLHttpRequest: Advantages and disadvantages
Just as many technologies have advantages and disadvantages, the purpose of this technology is to take advantage of it. Until now,
the/usr/bin directory. Including: btmaketorrent. py (seed making tool), bttest. py (test seed tool), bttrack. py (Tracker tool) and btdownloadheadless. py (used to create a Shared Source Tool) and btlaunchtasks. py (the Shared Source Tool is started in the background) and btshowmetainfo. py (tool for viewing download conditions) and btdownloadgui. py (graphical sharing Source Tool), btmaketorrent. py (graphical seed making tool ).
2. Configure and s
New feature 1: the Tracker and navigation bar of the desktop search bar are similar to the Ubuntu7.10 search bar of Google Desktop. I saw for the first time in Linux that it was the search bar integrated by SUSELinux, similar to the search usage of Vista. Tracker has powerful search functions. It can search any file or content, including documents, music, logs, and chat records, which is easier to use than
The download server provides download services for every user who sends a download request. The download service is point-to-point and one-to-one. BitTorrent works in different ways, it is the part of content contributed by each node. It serves several nodes at the same time until all user downloads are completed.
Generally, if there are too many people downloading HTTP/FTP, the server can easily reach the bottleneck and become slow. BitTorrent downloads feature that the more people download, t
. The actual crawling part is solved by the consumer, and the code is used: new fetcherthread (getconf ()). start (); we can see that we should go to the run function of fetcherthread to execute a series of page captures., Parsing, and other operations. (In addition, from the debugging process, you can see the property configuration file information: {job. end. retry. interval = 30000, FTP. keep. connection = false, Io. bytes. per. checksum= 512, mapred. job.
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.