toptal tracker

background:We use fastdfsV3.02 on the original server, now to migrate to the new server, no related documents on the Internet, tossing for a long time, now the migration process is recorded as follows, so that other students to configure and migrateTracker Server: 192.168.1.246Storage server: 192.168.1.246Both tracker and storage are deployed on the same server when the traffic is not very largeFirst, configure the

Fastdfs is an open source, high performance Distributed File system, his main features include: file storage, synchronization and access, design based on high availability and load balancing,Fastdfs is ideal for file-based Web sites, sample sharing and video sharing sitesFastdfs has two roles: Tracking Service (tracker) and storage services (storage), service control, dispatch files are load balanced access, storage services include: file storage, fil

To obtain the application memory usage type and time, you can view application heap updates in Device Monitor in real time: 1. Enable Device Monitor. Load the monitor tool from the 2. In the Debug Monitor window, select the application process to be viewed from the process list on the left. 3. Click Update Heap in the process list. 4. Select the Heap tab on the right panel. The Heap view displays the basic status of Heap memory usage, which is updated after each garbage collection. To view th

1.fastdfs Distributed File System, the main functions of the file management, including file storage, file synchronization, file access (file upload and download), etc.Solves the problem of mass storage and load balancing.The two cores of the 2.fastdfs are Trackers (tracker) and storage nodes (storage), where Tracker's main function is to complete scheduling and load balancing,The main function of storage is to store data.3.fastdfs file distribution s

the processing power and bandwidth limitations of the FTP server, the download speed will drop sharply, and some users may not be able to access the server. The BT protocol differs from the FTP protocol in that the more people download, the faster the download, because each downloader downloads the downloaded data to other downloads, taking full advantage of the user's upload bandwidth. With a certain strategy to ensure faster upload speed, download speed is faster. In a very short period of ti

Fastdfs is a lightweight, distributed file system, consisting primarily of tracker server, storage server, and client, which mainly involves two points:1 Client upload file process and protocol analysis2 implementation of a simple file upload function One: The basic process of file upload Fastdfs upload a file, mainly involves the following several steps: 1 Upload the connection request, the client will send the request of uploading file to

, PendingIntent deliveryIntent ){SmsMessage. SubmitPdu pdu = SmsMessage. getSubmitPdu (ScAddr, destAddr, text, (deliveryIntent! = Null ));SendRawPdu (pdu. encodedScAddress, pdu. encodedMessage, sentIntent, deliveryIntent );}...... At this point, the word "sendText ()" is gone, and it is replaced by another method name: sendRawPdu (). Tracing this method can find that it is SMSDispatcher. is this class familiar with a java method? Yes. We have already dealt with it in Stage 4! Let's see what its

through codeplex to achieve the project management I understand. Project management principles My principle is:Minimize all stakeholder tasks and maximize project continuity.This is a game in itself. There is no silver bullet in the world, and it can only be balanced as much as possible. The stakeholder mentioned here includes developers, testers, Coordinator personnel and so on. Everyone contributes freely and there is no need to follow a perfect process, such as cmme to increase the worklo

BT client source code analysis: SummaryAuthor: Ma GeDate: 2004-6-24 Overview:Compared with the tracker server, the BT client is much more complicated. Bram Cohen spent a year full time to complete BT, I guess most of the time is spent on the implementation and debugging of the BT client.Because the BT Client involves a lot of code, I can no longer go into the details just like analyzing the tracker server.

The hansh value of BT seeds is calculated. Recently, I am suddenly interested in BT seeds (do not ask why) 1. BT seeds (concept) BT is a distributed file distribution protocol. Each file downloader continuously uploads downloaded data to other Downloaders while downloading. This ensures that the faster the download, the faster the upload, to implement notification download 2. How does BT download and upload files simultaneously? Starting from the file itself, the BT file contains two parts of

1. Required installation Package Libfastcommon-master.zipFastdfs_v5.05.tar.gzFastdfs-nginx-module_v1.16.tar.gzNginx-1.8.0.tar.gz 2. Install Libfastcommon Package The following dependencies need to be installed before the ① is installed Libfastcommon (the system does not need to be installed if it has one):Yum install-y gccYum Install-y gcc-c++ ② Decompression Libfastcommon-master.zipUnzip Libfastcommon-master.zip ③ compilationCD Libfastcommon-master./make.sh ④ Installation./make.sh install 3. In

features such as promises, modules, generators, and comprehensions have emerged. You can read the standard and professional books, for example, Nicholas Zakas's Understanding EcmaScript 6 or Dr. Axel Rauschmayer's signing JS may be helpful. Learning standards from the main source and exploring new languages are the ways and methods to become professional. Use Network Resources I mentioned earlier that it is dangerous to use the network to understand the network, but now I want to propose that w

and generate the final flow based on the results in the batch. The entire process is shown below.The Spark streaming API can be very tightly matched to the Spark core API, which makes it easy for programmers to work in the oceans of batch data and streaming data.MLlibMllib is a machine learning library that provides a wide variety of algorithms for classifying, regression, clustering, collaborative filtering, etc. on a cluster (you can get more information from the

hint next to the formula (one of them is enough), the problem can be solved immediately. Like this: Then, you can clearly find the wrong formula: ▲ Color blindness Simulator simulation of input box validation 1 ▲ Color blindness Simulator simulation of input box validation 2 In addition, I have previously labeled the wavelength points of humans, birds and other people as symbols rather than colors. When making charts, you should usually consider using symbols instead of colors. Some tools are

. Recently, new features such as promises, modules, generators, and comprehensions have emerged. You can read the standard and professional books, for example, Nicholas Zakas's Understanding EcmaScript 6 or Dr. Axel Rauschmayer's signing JS may be helpful. Learning standards from the main source and exploring new languages are the ways and methods to become professional. Use Network Resources I mentioned earlier that it is dangerous to use the network to understand the network, but now I want to

platform that meets specific needs. "According to Toptal, a Web engineering company, the true highlight of Node. js is the construction of fast and scalable network applications.6. Provide services for proxy servers One of the biggest advantages of using Node. js is that it acts as a proxy server to provide services for services with different response times, or to collect data from multiple source points. For better understanding, see the following

value with the new value received from the client. Finally, we call SaveChages to save the object. 8-7 manually synchronize object graphs and change trackers Problem 　　You want to manually synchronize your POCO class and change the tracker. The update tracker accesses the object information that is being tracked by the Entity Framework. The information is not only the values stored in the object attributes

Build FastDFS + Nginx in Linux Build FastDFS + Nginx in Linux FastDfs depends on libevent. Prerequisites: 1. test environment directory:/home/users/wangyanpei/ 2. libevent version: 2.0.21-stable 3. Fastdfs version: FastDFS_v4.06.tar.gz 4. Nginx version: 1.6.0 5. fastdfs-nginx-module version: fastdfs-nginx-module_v1.15.tar.gz Installation path: Nginx:/home/users/wangyanpei/nginx Fastdfs:/home/users/wangyanpei/FastDFS Tracker path:/home/users/wangyanpei

Name Value Description DFS. Default. Chunk. View. Size 32768 The size of each file displayed on the HTTP access page of namenode usually does not need to be set. DFS. datanode. Du. Reserved 1073741824 The size of the space reserved by each disk, which must be set to be used mainly for non-HDFS files. The default value is not reserved, and the value is 0 bytes. DFS. Name. dir /Opt/data1/HDFS/Name,/Opt/data2/HDFS/Name,/Nfs/data/HDFS/Name We recomm

BT source code learning experience (7): Code Analysis of Tracking Server (HTTP protocol processing object)Author: Wolfenstein (neversaynever) The last time we analyzed the initialization process of the tracker class, we started to look at how the tracking server provides services.First, we analyze that the tracker processing object is httphandler, which is defined in BitTorrent/httphandler. py. The initiali