kilobyte megabyte

1. It is also the smallest unit of memory storage information, usually denoted by "B".2, Byte (Byte): bytes are the most common basic unit in a computer that represents storage capacity. A byte consists of a 8-bit binary number, usually denoted by "B". One character occupies one byte, and one Chinese character occupies two bytes. Other common storage units are:Storage capacity is measured in bytes B, Kbytes, megabytes, and 1 billion gigabytes (GB). The conversion relationship between them is as

the following figure, 13 logical volumes (raw devices) in the volume group are not used. (if no logical volumes in the closed/syncd status are displayed, go to step 1) but how can we know how large these 13 logical volumes are? You can use the following command: # Lslv lvdata0315 Logical volume: lvdata0309 volume group: datavg09 LV identifier: 0037de1d4154c0000000105cd3b6816. 11 permission: read/write VG state: active/complete LV state: Opened/syncd Type: Raw write verify: Off Max LPS: 512 pp s

content source : khanacademy-internet101-wires, cables, and WiFi(the original video and subtitles in English, the following Chinese content for personal understanding after the translation, for reference only)1. Related nouns :High trafficHigh FlowFibre-opticFiberAntennaAntennaSphericalSphere of　　　　Bandwidth BandwidthTransmission capacity, measured by bitrate transmission capacity, measured in bitrate　　bitrate ratio/bit rate/bitrateThe number of bits per second a system can transmit one bit per

Reprint Source: http://blog.csdn.net/liulin_good/article/details/7212355 What are the storage units of a computer?Computer storage units are generally used bit, Byte, KB, MB, GB, TB, PB, EB, ZB, BB to express,We often call a byte short as B, the KB abbreviation K. What a few k, what a few B. Second, what is their conversion relationship? 1, the smallest unit of information stored by the computer: bit bit (binary Digits): holds a binary number, which is 0 or 1, the smallest storage unit.

The general program idea is to use the recursion to calculate how much space the directory occupies, and then the space to occupy the value of the text file, so long as the access to this TXT file to know how much space occupied, do not have frequent access to read disk, save resources. Each time a user uploads a file or deletes a file, it is then counted again. Of course, you can also save the results to the database. Copy Code code as follows: function Countdirsize ($dir) {

1) When learning a computer, we often hear that the 1k,1m,1g bit is the smallest unit of data in a computer, a 16-bit machine, a 32-bit machine that is often heard, which is referred to as a bit.A byte (byte) is the unit in which the computer processes data, and the computer processes the data in bytes.1Byte = 8 bitUsually the 1k,1m,1g we hear refers to the number of bytes, and 1KB,1MB,1GBIn the computer, 1K is 2 of the 10-square, or 1024, so is:1kb=1024byte1mb=1024kb1gb=1024mb Buy hard disk, MP

file system is created on a local volume group through NFS.Share mode to establishFlashback Recover Area. 1. Create a file system on node1. [Root @ aix211/] # lsvg rootvg VOLUME GROUP: rootvg VG IDENTIFIER: 00040f8a00004c0000000140c6da55a7VG STATE: active PP SIZE: 128 megabyte(s)VG PERMISSION: read/write TOTAL PPs: 546 (69888 megabytes)MAX LVs: 256

Org. neodatis. ODB. Core. Io. bytearrayconverter The function of this class is: converts array of bytes into Native objects and native objects into array of bytes Public class bytearrayconverter {...... /*** Bit binary bits (or bits) byte 1 byte = 8bit kilobyte (Kb) kilobytes of megabyte (MB) megabytes* 1 MB = 1024kb = 1024*1024 byte gigabyte (GB) terabyte (TB) Too byte petabyte (PB)* Exabyte (EB) zetabyte

30 bytes)(1 GB = 1024 MB)1MBByte (MB, megabyte) = 1024 kilobytes (20 to the power of 2)(1 MB = 1024kb)1024 bytes (kb, kilobyte) = bytes (10 to the power of 2 bytes)1 byte = 8 bits (Bit) Note: Larger units include petabyte (petabyte, 1pb = 1024 TB), EB (exabyte, 1eb = 1024pb), ZB (zettabyte, 1zb = 1024eb), Yb (yottabyte, 1yb = 1024zb )...... 1.2 characters, in bytes, stringThe key to understanding encodin

function Getdirsize ($dir){$handle = Opendir ($dir);while (false!== ($FolderOrFile = Readdir ($handle))){if ($FolderOrFile! = "." $FolderOrFile! = "..."){if (Is_dir ("$dir/$FolderOrFile")){$sizeResult + = getdirsize ("$dir/$FolderOrFile");}Else{$sizeResult + = filesize ("$dir/$FolderOrFile");}}}Closedir ($handle);return $sizeResult;} Unit Automatic conversion functionfunction Getrealsize ($size){$KB = 1024; Kilobyte$MB = 1024x768 * $KB;

, default 47104): 7 Using default value 47104 8 Last sector, +sectors or +size{K,M,G} (47104-2097151, default 2097151): +10M 9 10 Command (m for help): p11 12 Disk /dev/sdb: 1073 MB, 1073741824 bytes13 255 heads, 63 sectors/track, 130 cylinders, total 2097152 sectors14 Units = sectors of 1 * 512 = 512 bytes15 Sector size (logical/physical): 512 bytes / 512 bytes16 I/O size (minimum/optimal): 512 bytes / 512 bytes17 Disk identifier: 0x94c5ab3518 19 Device Boot Start End Bloc

Storage Capacity Unit: Bit, Byte, KB, MB, GB, TB, PB, EB, ZB, YB, zbyb I recently read the Hadoop authoritative guide book, which has been designed by many organizations, However, my previous books seem to only teach GB, The current textbooks may be terabytes or petabytes of data, but I'm not sure. However, in the near future, there may be larger units that can be used, These days I 've been playing a boring game that tests my brain capacity, and I 've learned more about storage capacity uni