megabytes to terabytes

modem.kernel: The required size of the kernel, but not accurate, we will find that there are two lines, and the size is not the same. So, the true size of kernel, we need to get it by other means. Special attention is needed here.In the example, this step we can get 4 specific values, which are counted in the following table: Data Labels hexadecimal size (Byte) decimal Size (MB) Total Available DRAM size 0x20000000 Fb

: Each pixel can represent a maximum of 16 colors, 0-15 0000-1111 then you only need to use a length of 4 bits to indicate that one pixel accounted for 1/2256 colors: Each pixel can represent up to 256 kinds of 0-255 0000 0000-1111 1111 Only one bits with a length of 8 is required to represent a pixel of 1byte24-bit: R 1 byte 0-255: G 1 byte 0-255: B 1 byte 0-255 so one pixel is 3 bytesJPG: similar to RAR compressionPNG: Also compressed according to a special algorithm That's what we wrote in th

-client mode, at the expense of slightly longer startup times.-xms4g Sets the initial size (in bytes) of the heap. This value must is a multiple of 1024x768 and greater than 1 MB. Append the letter K or K to indicate kilobytes, m or m to indicate megabytes, g or G to indicate gigabytes.-xmx4g Specifies the maximum size (in bytes) of the memory allocation pool in bytes. This value must is a multiple of 1024x768 and greater than 2 MB. Append the letter

: {0: 20}, 3: {1: 41}}The array elements are also accessed through the [] operator:var array [2][2]intarray[0][0] = 0array[0][1] = 1array[1][0] = 2array[1][1] = 3similarly, multidimensional arrays of the same type can be assigned to each other:var array1 = [2][2]intvar array2 = [2][2]intarray[0][0] = 0array[0][1] = 1array[1][0] = 2array[1][1] = 3array1 = array2Because the array is a value, we can copy a separate dimension:var array3 [2]int = array1[1]var value int = array1[1][0]Passing an array

memory as quickly as possibleactiverehashing Yes# The client's output buffer is limited because, for some reason, the client is not fast enough to read data from the server,# can be used to force a disconnection (a common reason is that a publish/subscribe client consumes messages at a rate that cannot catch up with the speed at which they are produced).# can be set in three different ways for clients:# Normal Client# slave-Slave and MONITOR client# PubSub has subscribed to at least one pubsub

don't have such strict real-time requirements, you can set it to Yes so that you can free up memory as quickly as possibleactiverehashing Yes# The client's output buffer is limited because, for some reason, the client is not fast enough to read data from the server,# can be used to force a disconnection (a common reason is that a publish/subscribe client consumes messages at a rate that cannot catch up with the speed at which they are produced).# can be set in three different ways for clients:#

Reference: In-depth understanding of computer systems, sixth chapter6.1.1 Random access memory ram1. Static RAM (SRAM) vs. dynamic RAM (DRAM)First of all. Basic concepts: SRAM stores a bit structure to six transistors, and the DRAM stores a bit structure as a capacitor (dram can reach a higher density than SRAM). So SRAM is more expensive than DRAM, and the effect is faster access. (a desktop system SRAM no more than a few megabytes, DRAM can have hun

the database by adding a tablespace. you can log on to the database by using a user with the permission to create or modify the tablespace (there are multiple methods). Take sqlplus as an example: # Su-Oracle $ Sqlplus/nolog SQL * Plus: Release 9.2.0.5.0-production on Mon Aug 22 12:49:55 2005 Copyright (c) 1982,200 2, Oracle Corporation. All rights reserved. SQL> Conn/As sysdba Connected. SQL> alter tablespace ts_index add datafile 　　2 '/dev/rlvdata0318' size 4090; // The size is 4090 instead o

multiple channels. For example, as Microsoft continues to upgrade, its size ranges from several k floppy disks to a full disk, increasing the size of Microsoft's software, in addition to constantly upgrading and earning a lot of money, it also played a deterrent role, especially to scare our software staff. When I heard that I had to develop an operating system, I first thought of the operating system and the giant thing, china's capital is so tight that it cannot be solved. However, you may f

= parameters with-xmanagement (-xmanagement: class =, classpath =) You can specify a management class and its classpath. this option loads the class and causes its empty constructor to be called early in JVM startup. from the constructor, a new thread is then started, from which your management client is run.Bea jrockit Management Console-XMSSets the initial size of the heap. you shoshould set the initial heap size (-XMS) to the same size as the maximum heap size. this value can be specified in

I have encountered some vague concepts in my work and need to remember them.Bit indicates "bit" or "bit", which is the basis of computer computation;Byte indicates "Byte", which is the basic unit for calculating the computer file size; The transmission rate of the USB2.0 standard interface. Many people misunderstand "480 Mbps" as Mbit/s. In fact, this is wrong. In fact, "480 Mbps" should be "480 megabits/second" or "Mbps/second", which is equal to "60 Mbps/second ", let's see the gap.This shou

system tablespace, in megabytes. If the value is less than 10, you need to increase the capacity of the system tablespace; otherwise, you do not need to perform the following steps:12. 2. Enter the following command at the SQL> prompt: Select file_name, round (Bytes/(1024*1024), 0) total_spaceFrom dba_data_filesWhere tablespace_name = 'system '; The data file names belonging to the system tablespace and the size of these files are listed in the r

I have encountered some vague concepts in my work and need to remember them.Bit indicates "bit" or "bit", which is the basis of computer computation;Byte indicates "Byte", which is the basic unit for calculating the computer file size; The transmission rate of the USB2.0 standard interface. Many people misunderstand "480 Mbps" as Mbit/s. In fact, this is wrong. In fact, "480 Mbps" should be "480 megabits/second" or "Mbps/second", which is equal to "60 Mbps/second ", let's see the gap. This sho

/1024 requires about 29 mView remaining pps of rootvg# Lsvg rootvgVolume group: rootvg IDENTIFIER: 00f8e7b700004c0000000145aa472f5fVg state: active pp size: 512 megabyte (s)Vg permission: read/write TOTAL PPs: 1116 (571392 megabytes)MAX LVs: 256 FREE PPs: 498 (254976 megabytes)LVs: 14 USED PPs: 618 (316416 megabytes)OPEN LVs: 13 QUORUM: 1 (Disabled)TOTAL PVs: 2 v

.x86_64.rpm -Rw-r -- 1 root 4.6 K July 6 16:53 hadoop-hdfs-secondarynamenode-2.0.5-1.el6.x86_64.rpm -Rw-r -- 1 root 4.6 K July 6 16:53 hadoop-hdfs-zkfc-2.0.5-1.el6.x86_64.rpm -Rw-r -- 1 root 17 M July 6 16:53 hadoop-httpfs-2.0.5-1.el6.x86_64.rpm -Rw-r -- 1 root 26 K July 6 16:53 hadoop-libhdfs-2.0.5-1.el6.x86_64.rpm -Rw-r -- 1 root 11 M July 6 16:53 hadoop-mapreduce-2.0.5-1.el6.x86_64.rpm -Rw-r -- 1 root 4.6 K July 6 16:53 hadoop-mapreduce-historyserver-2.0.5-1.el6.x86_64.rpm -Rw-r -- 1 r

both 2, which indicates that the image operation is performed on two physical disks. 1. view the rootvg size. # Lsvg rootvgVolume group: rootvg IDENTIFIER: 00f9150300004c0000000145634ba48dVg state: active pp size: 1024 megabyte (s)Vg permission: read/write TOTAL PPs: 1116 (1142784 megabytes)MAX LVs: 256 FREE PPs: 199 (203776 megabytes)LVs: 13 USED PPs: 917 (939008 me