nbd meaning

http://blog.csdn.net/gui694278452/article/details/7652450 I. NBD profile NBD (Network block Device) allows you to use the disk space of a remote host as a piece of equipment. It's like a hard drive.With it, you can easily add another server's hard disk space to the local server.NBD is different from NFS. NFS simply provides a mount point for clients to use, and the client cannot change the partition format

The following is a test in ubuntu12.04.4. NBDUse of network Block devicesI. NBD Introduction NBD (network block device) allows you to use the disk space of a remote host as a block device. just like a hard disk. you can easily add the hard disk space of another server to the local server.Ii. NBD Installation Method In turbolinux version 10 or later,

CentOS6 compilation and load nbd module, centos6nbd Module Today, we suddenly found that the CentOS system does not have the nbd module and can only be reinstalled. The entire compilation process is recorded below: System: CentOS6.5 Kernel: 2.6.32-431. el6.x86 _ 64 [root@localhost ~]# yum install -y kernel-headers kernel-devel[root@localhost ~]# wget ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Compute

In some systems, qemu-NBD is called KVM-NBD and qemu-NBD-xen. It's basically the same. Use qemu-NBD to mount the virtual hard disk to the host. You need to do this: RmmodNBD ModprobeNBD max_part = 8 By default, the function of adding partitions to NBD is disabled. You need t

1. Download Ubuntu-16.04.1-server-amd64.iso2. Create a virtual machine in VBox, set the network configuration for network address translation NAT, and create a port forwarding rule (for SSH):Name: DefaultProtocol: TCPHost IP: nullHost Port: 2206subsystem IP: nullSubsystem Port: 223, the normal installation system, the intermediate selection of modules check sshd4, after the installation into the shell, modify the root password, lazy every time to execute commands are sudosudo passwd root5, modif

Uname-r #-> 3.10.0-123.el7.x86_64yum Install kernel-devel kernel-headerscd/tmpwget http://vault.centos.org/ 7.0.1406/OS/SOURCE/SPACKAGES/KERNEL-3.10.0-123.EL7.SRC.RPMRPM-IHV kernel-3.10.0-123.el7.src.rpm (This will be in/root/ Rpmbuild/sources build TAR.XZ Package) CD ~/rpmbuild/sourcestar JXVF linux-3.10.0-123.el7.tar.xz-c/usr/src/kernels/cd/usr/src /KERNELS/MV $ (uname-r) $ (uname-r)-OLDMV Linux-3.10.0-123.el7 $ (uname-r) CD $ (uname-r) make MRPROPERCP./$ (Uname-r)-old/module.symvers./cp/boot/

When the search engine grasps the lifeblood of the Internet economy, the typical application of the Internet, which is created by the search behavior, will affect all the people and things related to it. For the moment, we call the economic model of the related behavior a search economy. In this section we discuss one of the most basic elements of a search economy – search keywords. What are the key words? It can be any word in any language, mainly in the form of words. The essence of writing i

[Go] Return html tags for their original meaning, and html tags for their meaning To tell the truth, the word "div + css" does not know how many people are harmed. Maybe the author's intention is correct, but the followers have misinterpreted its meaning in terms of performance, the whole page should be a combination of div + css files. In this way, there is no v

The recent use of curl feeling is still very convenient, looked at the cookie file format of curl generated, some of the value of the meaning is not very clear, to find some information about the cookie looked down, do a memo The cookie file format generated by PHP Curl is as follows #Netscape HTTP Cookie File#http://curl.haxx.se/rfc/cookie_spec.html#This file is generated by libcurl! Edit at your own risk.Jifen. xx.comFALSE/FALSE0PHPSESSID Dmdvk314ru

Chapter eighth Introduction to object-oriented programmingThe contents of this chapter:What is object-oriented programmingOOP technologyThe Windows forms application's dependency on OOP8.1 Meaning of object-oriented programmingThe programming method described earlier, called function (or procedural) programming, often leads to so-called single applications, where all functions are contained in several code modules (often a code module). with OOP, many

Android Log Tag meaning, androidlogtag meaning One of the most important methods to analyze Android problems is to analyze logs in events. there are many system logs in the log, some of which are not very familiar with the meaning. The following is the system log tag obtained from the android source code. The Tag description is as follows: "30005 am_create_activi

Where T: class meaning, whereclass meaning public class DbEntityEntry This is a parameter type constraint. The specified T must be of the Class type. . NET supports the following types of parameter constraints:Where T: struct | T must be a structure typeWhere T: class | T must be of the Class typeWhere T: new () | T must have a non-argument ConstructorWhere T: NameOfBaseClass | T must inherit the class nam

Linux basic [Folder meaning], linux basic meaning The linux File directory is a tree directory. Bin --> Executable File Boot --> operating system boot file, system kernel, boot Information Dev --> device, device information, computer hardware device information Etc --> System Configuration directory Home --> home Directory, user folder Root --> super administrator folder with the highest Permissions

The meaning of directory and file permissions in Linux The meaning of file permission R: You can read the specific contents of this document; W: You can edit the contents of this file, including adding the details of the deleted file; X: The file has executable permissions-------Note: Here and window is not the same, in win, the file executable permissions are expressed through the extension, such as EX

What is the definition in C language? What is the meaning of the statement? What is the difference between them ?, Meaning difference In the C language, we may be very familiar with definitions and declarations, but we may not really understand them! Definition meaning: the so-called definition is to create (compiler) an object, allocate a memory space for this

String formatting symbolic meaning Symbol Description %c Formatting characters and their ASCII code %s formatting strings %d formatting integers %o Formatting an unsigned octal number %x formatting unsigned hexadecimal numbers %x Format unsigned hexadecimal number (uppercase) %f Format fixed-point numb

String formatting symbolic meaning Symbol Description %c Formatting characters and their ASCII code %s formatting strings %d formatting integers %o Formatting an unsigned octal number %x formatting unsigned hexadecimal numbers %x Format unsigned hexadecimal number (uppercase) %f Format fixed-point numb

A lot of friends in the tuning with MySQL will certainly use the explain to see the execution of the SELECT statement, here is a brief introduction to the results of the meaning of the two columns.1 Type column The official saying that this column represents the "type of access", and more commonly, the way MySQL finds the data rows needed. One is to introduce the worst from the most efficient to the best: all this is called a full-table scan, and no i

A lot of friends in the tuning with MySQL will certainly use the explain to see the execution of the SELECT statement, here is a brief introduction to the results of the meaning of the two columns.1 Type column The official saying that this column represents the "type of access", and more commonly, the way MySQL finds the data rows needed. One is to introduce the worst from the most efficient to the best: all this is called a full-table scan, and no i

Meaning of DBUnitdb, or decibel, is a very common unit in the field of electronics. This unit is characterized by the use of logarithms to represent the original data. 1 shell = 10 db = 10dB = 10 times times PowerFor an amplifier,power Magnification Ap = ten lg (PO/PI)voltage Magnification Au = LG (UO/UI)current Magnification Ai = LG (IO/II)For example: amplifier magnification of 40dB, indicating that its voltage amplification is 100 times times, curr