asteroid tracker

run mapreduce on both machines at the same time.First, check back here.String tracker = Conf. Get ("mapred. Job. Tracker", "local ");If ("local". Equals (tracker )){This. jobsubmitclient = new localjobrunner (CONF );} Else {This. jobsubmitclient = (jobsubmissionprotocol)Rpc. getproxy (jobsubmissionprotocol. Class,Jobtracker. getaddress (CONF), conf );}If the

can set the original JPEG image to copy at least three copies, but only 1or2 copies, if the data is lost, then the MogileFS Distributed file storage System can re-establish the lost copy number. In this way, mogilefs (do not raid) can save the disk, otherwise you will store the same copy multiple copies, completely unnecessary.4. "Much better than raid" – in the establishment of a non-storage area network RAID (Non-san RAID), the disk is redundant, but the host is not, and if your entire machin

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

DescriptionBessie wants to navigate her spaceship through a dangerous asteroid field in the shape of an n x n grid (1 Fortunately, Bessie has a powerful weapon that can vaporize all the asteroids in any given row or column of the grid with a single shot. this weapon is quite expensive, so she wishes to use it sparingly. given the location of all the asteroids in the field, find the minimum number of shots Bessie needs to fire to eliminate all of the

Http://poj.org/problem? Id = 3041 Asteroids Time limit:1000 ms Memory limit:65536 K Total submissions:14476 Accepted:7880 DescriptionBessie wants to navigate her spaceship through a dangerous asteroid field in the shape of an n x n grid (1 Fortunately, Bessie has a powerful weapon that can vaporize all the asteroids in any given row or column of the grid with a single shot. this weapon is quite expensive, so she

Bipartite Graph: minimum vertex overwrite = maximum match Asteroids Time limit:1000 ms Memory limit:65536 K Total submissions:15582 Accepted:8506 DescriptionBessie wants to navigate her spaceship through a dangerous asteroid field in the shape of an n x n grid (1 Fortunately, Bessie has a powerful weapon that can vaporize all the asteroids in any gi

Original article: Lesson 12: Display listsTranslated by: marhoo This time I will teach you how to use the display list. displaying the list will speed up the program and reduce the code length.When you are creating an in-game minor scenario, at least two planets are required on each layer. You can use the polygon in OpenGL to construct each planet. The clever way to do this is to create a loop where each cycle draws a plane of the planet, and you finally draw a planet with dozens of statements.

HDOJ 1240 Asteroids !, Hdoj1240asteroids Question link: http://acm.hdu.edu.cn/showproblem.php? Pid = 1, 1240 Asteroids! Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission (s): 3643 Accepted Submission (s): 2413 Problem DescriptionYou're in space. You want to get home. There are asteroids. You don't have want to hit them. InputInput to this problem will consist of a (non-empty) series of up to 100 data sets. each data set will be formatted accordin

Asteroids! Time Limit: 2000/1000 MS (Java/others) memory limit: 65536/32768 K (Java/Others)Total submission (s): 2599 accepted submission (s): 1745 Problem descriptionyou're in space. You want to get home. There are asteroids. You don't have want to hit them. Inputinput to this problem will consist of a (non-empty) series of up to 100 data sets. each data set will be formatted according to the following description, and there will be no blank lines separating data sets. A single data set has

Document directory Problem description Input Output Sample Input Sample output Asteroids! Problem description You're in space. You want to get home. There are asteroids. You don't have want to hit them. Input Input to this problem will consist of a (non-empty) series of up to 100 Data sets. Each data set will be formatted according to the following Description, and there will be no blank lines separating data sets. A single data set has 5 components: Start line-a single line, "Start N",