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Fastdfs Introduction
Fastdfs is a lightweight open source Distributed File systemFastdfs mainly solves the problem of large capacity file storage and high concurrency access, and realizes load balance in file access.FASTDFS implements a software-style raid that can be stored using a cheap IDE hard diskSupport Storage S
What is Fastdfs
Fastdfs is an open source Distributed file system written in C language. Fastdfs for the Internet, fully consider the redundant backup, load balancing, linear expansion and other mechanisms, and pay attention to high availability, high performance and other indicators, the use of Fastdfs easily set up a high-performance
status, each node is master, and there is no single point problem.FASTDFS System StructureAs you can see, Tracker server is independent from one another and there is no direct connection. Each time client clients are uploaded, downloaded, or deleted, the firstThe Tracker Server,tracker server is requested to return the optimal storage server for the specified group class by load balancing, and then the client then calls storageServer for upload, down
Since June, has been thinking about a set of common service platform. In the design of user behavior analysis and user promotion, found in their own framework for mass file storage does not have a reasonable solution. Originally intended to use Windows2003 DFS system to develop a new file system, and later found that t
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Master
Master
Master Server Module:
/wKiom1YPe3CApyheAAFyzjEzRB4922.jpg "title=" 5.PNG " alt= "Wkiom1ype3capyheaafyzjezrb4922.jpg"/>6 , return to the New Folder dialog box, select OK, and a dialog box asking if you want to create a replication group, select No; (Create replication group reference: Configure DFS Replication for Distributed file systems)650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M02/74/07/wKioL1YPe42g648EAAELINVarzc
127.0.0.1 threads Worker default is 5 base path basepath default: e:/data/mydfs/store/Step three: Write the client code to put Mydfsserver.jar into the client's environment variableMydfstrackerserver client=new mydfstrackerserver ("127.0.0.1", 9999);Method Three: Hard-codedIf it is not in the spring Web environment, use the method in the code0. Start the serviceFirst parameter: Port number to start the second parameter: Picture storage address the third parameter: number of worker threads fourt
distributed storage System, he has the following features:
A. Storing massive files
B. Quick access to stored files
Refer to Weed-fs's official website Https://github.com/chrislusf/seaweedfs Installation Guide installation Weed-fs, see:
After executing the go get github.com/chrislusf/seaweedfs/go/weed command, the WEED-FS is downloaded and compiled, and the generated executable weed is placed in the $go
In a network, the physical location of a shared file is distributed, and the user asks the other's shared path to get a clear picture of the shared resource. If you want to see a LAN full of shared files, you need to ask everyone, such an operation is too inconvenient.
Depending on the needs of your administrator, you can use the Distributed
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 (
-1.6.27--with-default-user=mfs--with-default-group=mfs--disable-mfsmaster-- Disable-mfschunkserver--enable-mfsmount If there is an error configUre:error:mfsmountbuildwasforced,butfuselibraryistoo oldornotinstalledyuminstallfuse-devel–ymakemake Installln-s/usr/local/mfs-1.6.27/usr/local/mfsbin is the client's command to create the directory and mount the Mkdir/mfsdatachown -Rmfs.mfs/mfsdatall-d/mfsdata/drwxr-xr-x2mfsmfs 40964 Month 2812:19/mfsdata//usr/local/mfs/bin/mfsmount/mfsdata-h192.168.1.22
-3.4.2 directory after decompression:#cd Cpp/demo/ice/helloTo run the server:#./serverIf there are fewer errors in the library, solve:#vim/etc/ld.so.confSecond line join:/usr/local/ice-3.4.2/ice-3.4.2/lib Save exit#/sbin/ldconfig–vTest success:#./server#./clientClient sends data to server side successfully!Third, the installation of Qt.(I will not explain this to everyone.)Four, haha so we put the basic environment to build up. Happy start as the code of the porter. Started writing the code. Ha
1: class chart
2: Data Structure
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Create table TBCOFILE
(
Fileid integer not null,
Filetime date,
TYPE VARCHAR2 (10 ),
Userid integer,
IP VARCHAR2 (20 ),
Apptype integer default 0
)
3. Development procedure
1: apply for the file ID from the database and get the time at the same time. Create a file
Microsoft has made a lot of effort to drive their Windows storage technology. One of the most critical measures is the constant cost of spending on Windows Server 2003 and the development of new Distributed File System (DFS) features.
Distributed File
stored directly in MySQL). The data volume is very embarrassing. Generally, servers cannot store and expensive servers cannot afford it; as a result, everyone is eyeing open-source solutions that use cheap pcs to build distributed file systems, such as TFs and moosefs. However, using these open-source solutions is risky. It is of course a pleasure to run normally every day, if something goes wrong, you can
The metaserver metadata persistence of the KFS file system adopts the checkpoint + Log method,The following uses the source code to analyze the persistence mechanism and implementation details of metadata in KFS metaserver.
1. Related source code files
KFS metaserver metadata persistenceCodeThe directory is KFS-[version]/src/CC/meta, where,KFSThe source code of metadata persistence is as follows:
(1)
Tags: Distributed File system MFSOne, MFS characteristics:1. Free (GPL)2. Universal file system, no need to modify the upper application can be used3. Can be expanded online, the architecture scalability is very strong.4. Simple deployment.5. High availability, can set any d
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