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Introduction to LVM

unique numbers are the smallest units that can be addressed by LVM. The PE size is configurable. The default value is 4 MB. 4. VG: volume group) An LVM volume group is similar to a physical hard disk in a non-LVM system and consists of physical volumes. You can create one or more "LVM partitions" (logical volumes) on the volume group. The LVM volume group consists of one or more physical volumes. 5. LV: logical volume) The logical volume of LVM is similar to the hard disk partition in a non-LVM

Basic concepts of Linux LVM (1)

to LVM.* Volume group (Volume GROUP,VG)LVM volume groups are similar to physical hard disks in non-LVM systems, which consist of physical volumes. You can create one or more LVM partitions (logical volumes) on a volume group, and an LVM volume group consists of one or more physical volumes.* Logical Volume (logical VOLUME,LV)LVM logical volumes are similar to hard disk partitions in non-LVM systems, and file systems (such as/home or/usr) can be created on top of logical volumes.*pe (physical Ex

The grep command for Linux

Tags: recursive OLE at the beginning of a continuous regular expression expression dir lin Global search Regular expression (RE) and print out of the line I. FORM of command1. grep -n --color=auto ‘str‘ filename/dirname2. cat filename | grep ……3. grep -E ‘(str)+\.?[0-9a-zA-Z]..str.*‘4. egrep ‘str1|str2‘5. grep -F ‘*‘ ……6. fgrep ‘*‘ ……Two, example 1. grep parameters* -n 行号* --color=auto 结果颜色高亮显示,一般在alias中定义即可* -c 对结果行计数* -i 不区分大小写* -v 反向搜索* -m3 匹配行数达到3行后停止匹配 * -A1 同时打印搜索结果行的后一行* -B3

Overview of the iOS dictionary

Groups the objects in a list, using key-value pairs in groupsThe Nsdictionary nsmutabledictionary class creates a list of objects with keys.If you need to add or remove objects to the dictionary, use Nsmutabledictionary1 Creation of the dictionary Alloc constructor or Dictionarywithobjects:forkeysDictionaries created with nsdictionary cannot be changed once created, and dictionaries created with nsmutabledictionary can be changed.Nsarray *listofobjects=[nsarray arraywithobjects:@ "Hello World" @

JS interview pit: Variable boost

Parsing and execution procedures in the globalPreprocessing: Create a lexical environment (lexicalenvironment, which is abbreviated as LE), scan JS for declaring functions declaratively, variables defined with Var, and add them to the lexical context of the preprocessing phase.First, how to understand the preprocessing in the global environmentFor example, the following code:var a = 1;//variables defined with Var to assign Var b;//variables defined wi

914D Bash and a Tough Math Puzzle

Transmission DoorAnalysisUsing the segment tree to maintain the interval GCD, each query finds the first point that is not a multiple of x, and if there is an interval that gcd cannot be divisible by x, the interval is illegal.Code#include #include#include#includestring>#include#include#include#include#include#include#include#includeSet>#include#includeusing namespacestd;intd[2000100],cnt,a[500100];inlineintgcdintXintY) {returny==0? X:GCD (y,x%y);} InlinevoidBuildintLeintRiintwh) { if(

[Daily bible calendar] August 1, October 13, 2014

Tags: Bible calendar 650) This. width = 650; "src =" https://mmbiz.qlogo.cn/mmbiz/UgOJIibwwnjykRvmwxNeFjTPZRvoQpNA3xmFibELMqYiasTqor8xXJD6fLyZGJpWYicXc7nE99NHXUaxCSnN72t2ibw/0 "alt =" 0 "/> 650) This. width = 650; "src =" https://mmbiz.qlogo.cn/mmbiz/UgOJIibwwnjwRWhzTTbxXacHdsI0jRibSSWmDBkj9p4qcRgibrj0UTo3zaV1HscXQs0xyP1NXZicLVJRz2KTtpUSCQ/0 "alt =" 0 "/> Note: mobile users (especially apple (IPAD) can select all texts and read them on the machine. Lundi

LVM briefing Hall

unique numbers are the smallest units that can be addressed by LVM. The PE size is configurable. The default value is 4 MB. 4. VG: volume group) An LVM volume group is similar to a physical hard disk in a non-LVM system and consists of physical volumes. You can create one or more "LVM partitions" (logical volumes) on the volume group. The LVM volume group consists of one or more physical volumes. 5. LV: logical volume) The logical volume of LVM is similar to the hard disk partition in a non-L

A vision of the cloud, why become a unicorn?

650) this.width=650; "Src=" Http://s1.51cto.com/wyfs02/M00/83/B8/wKioL1d7TM3x8WLMAAFZmfBWl6I595.jpg-wh_500x0-wm_3 -wmp_4-s_476720405.jpg "Title=" Wu Asia 2.jpg "alt=" Wkiol1d7tm3x8wlmaafzmfbwl6i595.jpg-wh_50 "/>(Wuyazho, CEO of Le Vision Cloud)Now that you are in the office of the Lego Cloud, you will surely be shocked by the sight. This March, le Vision Cloud announced the completion of a round of financin

How can a cool guy who violates a contractual spirit be so righteous?

most netizens from the emotional standing on 360 this sideIn the rationale, cool and 360 formation of the joint venture is in black and white, protected by the law, the cool has made a damage to the interests of the joint venture initiative, contrary to the spirit of the contract, and 360 require cool to abide by the contract, the discerning eye are out, its purpose is not necessarily cool money, but hope that le.In the sentiment, the cool is in the absolute inferior position. After the public

Hdu 5288 OO ' s Sequence

Title Link: http://acm.hdu.edu.cn/showproblem.php?pid=5288OO have got a array a of size n, defined a function f (l,r) represent the number of I (L∑I=1->N∑J=I->NF(I,J) mod (109+ ) . Inputthere is multiple test cases. Please process till EOF.In each test case:First Line:an integer n (nSecond line:contain N numbers ai (0Test instructions: To an array of size n A[i] and n each number, all f (Le,ri) and ([Le,r

UBUTN installation of Nvidia graphics driver

Ubuntu 12.04/11.10/11.04/10.04 User, enter the following command in the terminal 1 sudoapt-add-repositoryppa:ubuntu-x-swat/x-updates Update your system library when you have finished adding the PPAUpdate 1 sudoapt-getupdate Now install your NVIDIA GeForce 304.108 graphics driver using the System apt-get commandInstallation 1 sudoapt-getinstallnvidia-currentnvidia-settings The above command will insta

Python version des and Mac algorithms

]*64global ipfor I In range:d est[i] = source[ip[i]-1]return destdef string2binary (str): le = Len (str) dest =[0]*le*4i = 0for C in str: i + = 4 J = 0 S = Hex2bin (c) L = Len (s) for D in S:dest[i-l+j]=int (d) J + = 1return dest "/** * IP-1 Reverse * @param source * @return */" def CH Angeinverseip (source):d est = [0]*64global _ipfor i in range (+):d est[i] = source[_ip[i]-1]return dest '/** * * Get whe

Codevs 1217 borrowing the classroom

10% of data, there are 1 le;N, M le; 10;For 30% of data, there are 1 le;N, M le; 1000;For 70% of data, there are 1 le;N, M le; 105;For 100% of data, there are 1 le;N, M

Report, 20150402, formulas on Entropy, part I

{\ln {\left| {H\left ({{E^{j\omega}}} \right)} \right|} ^2}d\omega}.\end{aligned}\end{equation} Similarly, if $H \left (z \right) $ is minimum-phase and $h _0 = \dots = h_{k-1} = 0,~h_k \ne 0$ for some posi tive integer $k $ (i.e., $k $ is the relative degree of the system), then $\ln h_k^2 = \frac{1}{{2\pi}}\int_{-\pi}^\pi {\ln {\left| {H\left ({{E^{j\omega}}} \right)} \right|} ^2}d\omega}$.Lemma 3: Let the random vector $X \in \mathbb{r}^n$ has zero mean and covariance $K = exx^t$ (i.e., $K _

Design Patterns (2) which is better for simple factory and factory?

Or factory mode: This mode is frequently used, and problems are also compared. The main reasons are simple factories, factory methods, and abstract factories. Sort out the chat records of yourself and a netizen: Question: Yu le (35466616) 12:26:27After dinner, I asked a question. Which is better for simple factory and factory methods?Yu le (35466616) 12:28:28I think there is nothing wrong with a

[Daily bible calendar] August 1, October 15, 2014

Tags: Bible calendar 650) This. width = 650; "src =" https://mmbiz.qlogo.cn/mmbiz/UgOJIibwwnjykRvmwxNeFjTPZRvoQpNA3xmFibELMqYiasTqor8xXJD6fLyZGJpWYicXc7nE99NHXUaxCSnN72t2ibw/0 "alt =" 0 "/> 650) This. width = 650; "src =" https://mmbiz.qlogo.cn/mmbiz/UgOJIibwwnjxZpMRRkUeeSku5SnMf8Zw8lHibib9hqya2M3BSHkhMt6PB4sUmgmNcU4ic7jhK9lI0Whxlq4t3iadUnA/0 "alt =" 0 "/> Note: mobile users (especially apple (IPAD) can select all texts and read them on the machine. Mercredi

Garlic: garlic (shortest way) with a passion for work

lot of time. So he had a compromise-he wanted to be in the rain and as little as possible in the case that the sum of the journeys he had taken back to the company was less than or equal to L. Please help yourself to a job-loving garlic. Plan A path, don't let him waste time. Input The first line enters the number of test groups T (1≤T≤20). The first line enters the number of test groups T (1 \le T \le 2

Uoj Goodbye dingyou Round

2.14 Night of the game, now changed the four questions, but also the answer. Here's a puzzle.New Year's Xordescriptiongive you \ (n\) , and then you construct \ ([L, R], l make interval xor ( n\)SolutionMany of the practices areMy method is special ( n\le 4\) , and then for odd use \ ([n-3,n-1]\) , even with \ ([N-4, n]\)New Year's Leaves descriptionA tree \ (n\le 5e5\) , each time the leaves of a primitive

2018 Blue Bridge Cup B Group Simulation (i) I. The stars in the sky

In a star-ravaged night, the king of garlic A number of the stars in the sky. The king of garlic has cleverly drawn a Cartesian coordinate system in the sky, so that all the stars are distributed in the first image. There is an NN star in the sky, he can know the coordinates and brightness of each star. Now, the garlic June asked himself QQ times, each time he asked himself each rectangular area of the star's brightness and how much (including the Stars on the border). Input Format The first lin

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