proc hadoop

#include #include #include #include #include #include #include #include #include #include #include static struct Proc_dir_entry *proc_root;static struct Proc_dir_entry *proc_entry;#define USER_ROOT_DIR "Fellow_root"#define User_entry "Fellow_entry"#define Info_len 16Char *info;static int proc_fellow_show (struct seq_file *m, void *v){seq_printf (M, "%s\n", info);return 0;}static int Proc_fellow_open (struct inode *inode, struct file *file){return Single_open (file, proc_fellow_show, NULL);}Stati

What Proc and Lambda have in common: Similar syntaxproc.new{|n| N**2}lambda{|n| N**2} Can be called with the. Call methodHello_proc = proc.new{puts "hello!"}Hello_proc.call #Hello!Hello_lambda = lambda{puts "hello!"}Hello_lambda.call #Hello! can be converted to block with keywordNums = [1,3,4,5,6]Cube_proc = proc.new{|n| n**3}Cube_nums_proc = Nums.map (cube_proc) #[1,27,64 ...]Cube_lambda = lambda{|n| n**3}Cube_nums_lambda = Nums.map

#! /Bin/sh # The following two parameters can be modified as needed: ethxname = eth0 # Nic name statfreq = 2 # statistical interval, in seconds. It is recommended to be a multiple of 2 or 2 # The following parameters, do not modify influx_kbps = 0outflux_kbps = 0influx_mbps = 0outflux_mbps = 0unsigned_long_max = 4294967295 # handle overflow ethname = 'cat /Proc/NET/dev| Grep $ ethxname | awk-F "[:] +" '{printf ("% s", $2);} ''if test" $ ethxname "! =

When adding new hardware to an existing Linux system, you want to know the resource configuration status of the current system. How should you view it? Very convenient. The/proc file system contains kernel information about resource allocation. Among them,/proc/interrupt,/proc/dma,/proc/ioports, including system interr

1. symptom and Problem Description 1. You need to directly interact with the kernel through scripts in linux user mode, such as getting/setting values of certain variables in the kernel. 2. dynamic configuration is required when the Linux kernel is started. 2. Key process and root cause analysis The/proc file system is a virtual file system through which a new method can be used to communicate between Linux kernel space and user space. In the/

the page where the results are checked"Cloudera recommended setting/proc/sys/vm/swappiness to 0 when checking host correctness." The current setting is 30. "Warning, make the following settings# vi/etc/sysctl.confvm.swappiness = 0# sysctl–pWhen checking host correctness, the "enabled" transparent large page appears, which can cause significant performance issues. "Warning, make the following settingsecho never >/sys/kernel/mm/transparent_hugepage/ena

Lesson 11:proc application (with default parameters)1.//all parameter values are not necessarily entered when using the process. The input parameters of the procedure can have default values. The default value is determined by{Default parameter name default} specified. If the procedure is called without specifying the values of these parameters, its default value is used.Otherwise, use the input values to override the default values. When using defaul

Proc export can export two types of files: Export the delimited file1 * example; 2 proc export data = hotels 3 OUTFILE = 'C: \ myrawdata \ Alibaba s.txt '/* The suffix name determines the format of the output file. In addition, the value can also be specified using the DBMS = option. */4/* For example, if the space-delimited file does not have a standard suffix, you can only use the DBMS = option to outpu

Label:The ORACLE11G database was installed on the virtual machine and was originally intended to be used in a C/s + + learning operations database. The result was a big pit. It took two days from the installation of the Oracle database to the configuration of the proc compilation options. But it made me realize that I was weak: 1. There is not enough use of Linux commands and scripts. 2. The role of Linux folders is not well understood; (plan to add a

Description of the main file in the/proc directory File or directory Name Description Apm Advanced Power Management Information CmdLine The file gives the kernel-initiated command line CPUinfo CPU Information Devices Devices that can be used (block devices/character devices) Dma Displays the DMA channel currently in use Files

Processor: The number of the logical processing cores in the system. For a single-core processor, the class is considered its CPU number, and for multicore processors it can be a physical core, or a virtual logical core using Hyper-Threading Technology Physical id: The label of a single CPU siblings: Number of logical physical cores for a single CPU Core id: The number of the current physical core in its CPU, which is not necessarily contiguous CPU Cores: The physical core number of the C

1. Proc file systemThe Proc file system is a mechanism for checking the kernel state in the user State. The file content is dynamically created, not on the disk, but in the memory, and power loss occurs.Cat/proc/meminfo/to view the current memory usageKernel description:[Cpp]Unsigned int low_ino;Unsigned short namelen;Const char * name;Mode_t mode;Nlink_t nlink;U

Https://stackoverflow.com/questions/1052589/how-can-i-parse-the-output-of-proc-net-dev-into-keyvalue-pairs-per-interface-uHttps://www.ibm.com/developerworks/cn/linux/1312_caojh_pythonlinux/index.html#!/usr/bin/pythonlines = open ("/proc/net/dev", "R"). ReadLines () Columnline = Lines[1]_, receivecols, Transmitcols = Columnline.split ("|") Receivecols = Map (lambda A: "Recv_" +a, Receivecols.split ()) Transm

Read the MTD partition table via the/PROC virtual file system: CAT/PROC/MTDMTD. Name = Raspi,. Size = 0x00400000 (4M). Erasesize = 0x00010000 (64K) . numeraseregions = 0Creating 6 MTD partitions on "RASPI":0x00000000-0x00400000: "All"0x00000000-0x00030000: "Bootloader"0x00030000-0x00040000: "Config"0x00040000-0x00050000: "Factory"0x00050000-0x00360000: "Kernel"0x00360000-0x003b0000: "DATA"through this struc

A few explanations on the content of the title:1. Proc Directory is a virtual file system that provides interaction for Linux user space and kernel spaceIt only exists in memory and does not account for actual flash or hard disk space2.the device in the/proc/devices/is generated when the driver is loaded3, thedevice under/dev/is generated by creating a device node, the user through the device node to access

about/proc/uptime The meaning of the two parameters in this file server work About the meaning of the two parameters in the/proc/uptime file: [Root@app ~] #cat/proc/uptime3387048.81 3310821.00 The first parameter is the time (in seconds) that represents the boot from the system to the present:3,387,048,.81 seconds = 39.2019538194444 days, indicating that th

Label:Go Proc Simple use case--VC connecting Oracle Operating system: Windows 7 Database version: Oracle 10g VS Version: VS2010 Preface: There are many ways to connect Oracle, here only proc as an example, explain how to connect Oracle, there is something wrong, I hope you crossing point out, learn to go together. One, install the client version of Oracle 10g. Note: Do the customer configuration, take this

the notation of this macro functionTrim to left end to right endCall Symput ('numpaid', trim ( leftCreate a macro based on the variable namedata _null_; Set Sasuser.courses;call symput (Course_code, Trim (course_title)); /* Two variables in each observation to the macro value and the macro variable */run; %put _user_;Scan rules for multiple macro triggersThe macro processor treats two as one, so the first scan lv2 is processed into (LV2)->lv1, and the second scan draws resThe LV2 first scan w

Tags: ioremap inux Qualcomm describes the Linux system in the Port Soc form fileWe take the high-pass IPQ4019 chip as an example to illustrateStep1 the situation of Iomem_resource in/proc/iomem[[Email protected]:~]# Cat/proc/iomem060f8800-060f88ff:qscratch_baseThe 078AF000-078AF1FF:MSM_SERIAL_HSL//step1 78af000 is the physical address of the serial port on the SOC. See the device information below078b5000-0

Hadoop cannot be started properly (1) Failed to start after executing $ bin/hadoop start-all.sh. Exception 1 Exception in thread "Main" Java. Lang. illegalargumentexception: Invalid URI for namenode address (check fs. defaultfs): file: // has no authority. Localhost: At org. Apache. hadoop. HDFS. server. namenode. namenode. getaddress (namenode. Java: 214) Localh