proc hadoop

See http://unix.derkeiler.com/Newsgroups/comp.unix.shell/2006-11/msg00577.htmlRe: How can/proc/loadavg be used? From: Bruce Barnett > Date: Wed, 15 Nov 2006 13:00:11 + 0000 (UTC) Bo Yang In Linux proc filesystem, there is a fileLoadavg, it contain three fields seperatelyDescribe the last 1, 5, 15 minutes load average. Also avalable In the uptime (1) command for older systems.The top (1) program sh

In windows, proc does not support access through the parameter list, but in Linux, it does! Void insert_sale_to_db (float tm){Exec SQL WHENEVER SQLERROR GOTO ERROR;Exec SQL INSERT INTO SALE VALUES (: tm );Exec SQL COMMIT WORK;Return; ERROR:Makelog ("debug. log", "db_show ");Makelog ("debug. log", sqlca. sqlerrm. sqlerrmc ); } This code is incorrect. proc will prompt the undefined identifier. This is bec

Meanings of the two parameters in the/proc/uptime file: [Root @ app ~] # Cat/proc/uptime3387048.81 3310821.00 The first parameter indicates the time (in seconds) from the system startup to the present ):3387048.81 seconds = 39.20195381944444 days, indicating that the server has been continuously started for 39.20195381944444 days The second parameter indicates the system idle time (in seconds ):331

/Proc // STATContains all CPU activity information. All values in this file are accumulated from the start of the system to the current time.[Root @ localhost ~] # Cat/proc/6873/STAT6873 (A. Out) r 6723 6873 6723 34819 6873 8388608 77 0 0 41958 31 0 0 25 0 3 0 5882654 1409024 56 4294967295 134512640 134513720 32155790400 2097798 0 0 0 0 0 0 0 17 0 0 0 [root @ localhost ~] #Each parameter means:Parameter des

Each file has a corresponding file action sheet, the most important thing is read operation and write operation, proc file's read-write function should pay attention to its corresponding return value, if in the reading function has returned a positive number, then the upper level will think that the file still have data need to read, will continue to read indefinitely ... When implementing the proc file rea

This article mainly introduces the two differences between Proc and Lambda in Ruby, this article explains that in proc and lambda, the return keyword has different meanings, check the parameters of the different ways two important differences, need friends can refer to the 1. In proc and lambda, the return keyword has different meanings: In

Select name from sysobjectsWhere name like 'usp _ EB_Admin %'And xtype = 'P' Select 'drop proc' + name from sysobjectsWhere name like 'usp _ EB %'And xtype = 'P' Select name from sysobjectsWhere name like 'EB %'And xtype = 'U' Select name, length from syscolumnsWhere object_id ('EB _ price_applyfororder') = idOrder by colid Select name,(Case xtypeWhen 56 then 'int' when 231 then 'nvarchar 'when 239 then 'nchar'When 61 then 'datetime' when 48 then

[Root @ localhost ~] # Cat/proc/6873/STAT6873 (. out) r 6723 6873 6723 34819 6873 8388608 77 0 0 41958 31 0 0 25 0 0 0 5882654 1409024 56 4294967295 134512640 134513720 0 3215579040 0 0 0 0 0 0 0 0 17 0 0 0 0 0 0 [root @ localhost ~] # Each parameter means:Parameter descriptionPID = 6873 process (including Lightweight Process, namely thread) NumberComm = A. out application or command nameTask_state = R Task status, R: Runnign, S: Sleeping (task_interr

/* DEVICE_ATTR (state) clashes with Dev_attr_state for Sdev */struct device_attribute dev_attr_hstate =__ATTR (state, S_IRUGO |S_IWUSR, Show_shost_state, store_shost_state); static ssize_tshow_shost_mode (unsigned int mode, char *buf) {ssize_t len = 0;if (Mode mode_initiator) len = sprintf (buf, "%s", "initiator"), if (Mode mode_target) len + sprintf (buf + len,"%s%s", Len? ",": "", "Target"), Len + = sprintf (buf + len, "\ n"); return Len;How to display and update kernel parameters via SYSFS

floating point calculation exceptions are supported CPUID Level : One : The value in the EAX register before the CPUID instruction, and different CPUID instructions will return different content WP : Yes: Indicates whether the current CPU supports write protection for user space in the kernel state (write Protection) Flags : : Features currently supported by the CPU bogomips : 4799.89: Calculate CPU Speed Clflush Size : +: Each time the cache size unit is refreshed cache_alignment

[Root @ VP-CS-243 ~] #! CatCAT/proc/NET/sockstatSockets: used 294TCP: inuse 35 orphan 0 TW 0 alloc 45 mem 1UDP: inuse 13 mem 2Udplite: inuse 0Raw: inuse 4Frag: inuse 0 memory 0 Sockets: used: Total number of used protocol socketsTCP: inuse: number of TCP sockets in use (Listening. The value is ≤netstat-lnt | grep ^ TCP | WC-lTCP: orphan: number of TCP connections without a master (not in any process) (useless, number of TCP sockets to be destroyed)TC

Detailed parameters: Sockets:used: Total amount of all protocol sockets usedTcp:inuse: The number of TCP sockets that are being used (listening). Its value ≤NETSTAT–LNT | grep ^tcp | Wc–lTcp:orphan: Number of TCP connections with no primary (not part of any process) (useless, number of TCP sockets to be destroyed)TCP:TW: Number of TCP connections waiting to be closed. Its value equals Netstat–ant | grep time_wait | Wc–lTcp:alloc (Allocated): The number of TCP sockets that have b

package embeddable below4. Next you can write a script in the groovy console, enter the Groovyconsole command in the Windows Console (CMD) to enter the groovy console, enter the code inside the println "HelloWorld" carriage return, press the key combination CTRL + R to see the results of the operation.Analytical:Json:{"ACCT_NBR": 1234,"FirstName": "John","LastName": "Smith","Age": 25,"Address": {"StreetAddress": "2nd Street","City": "New York","State": "NY","PostalCode": "10021"}},{"ACCT_NBR":

Can no longer be simplified1#include 2#include 3 4#include 5#include 6#include 7 void* Meng_seq_start (structseq_file*s,loff_t*POS)8 {9 if(*pos>1)Ten returnNULL; One returnPos; A } - - void* Meng_seq_next (structSeq_file*s,void*v,loff_t*POS) the { -(*pos) + +; - if(*pos>1) - returnNULL; + returnPos; - } + A voidMeng_seq_stop (structSeq_file*s,void*v) at { - } - Char*meng_seq_data[2]={"hello.\n","This meng seq

DD from A_qh_leaveapply_detail WHERE apply_no=vapply_no and (start_time= ' 1300 ' OR end_time= ' 1200 ');--if (nn>0) then if (nn>0 and dd>0) then UPDATE c_txyymm C SET (c.day_end) = (SELECT SUBSTR (c . day_end,1,2) | | ' 1700 ' from A_qh_leaveapply_detail A WHERE (c.fac_no=vfac_no OR c.fac_no in (' HR ', ' hghr ')) and c.fac_no=a.fac_no an D C.PNL=A.PNL and A.apply_no=vapply_no) WHERE (C.fac_no=vfac_no OR c.fac_no in (' HR ', ' hghr ')) and EXISTS (SELECT A.PNL from A_qh_leaveapply_deta

synchronization, please use it reasonably according to the actual scenario.Although this document is written as an example, the code usage scenarios for process synchronization are not related to file operations.Although the Semaphore Class (beacon) can limit the number of simultaneous threads, or even set the maximum simultaneous operand to 1 o'clock, the behavior is similar to the mutex class (mutex), but because the semaphore does not receive an exception notification when an exception exits

: The ø0 operation succeeded ø-1 the host variable corresponding to the indicated variable returned or inserted, updated to a null value Ø-2 data is very long when it is stored from the database to the corresponding host variable, and It is not possible to infer how many bytes have been truncated ø>0 is truncated in the corresponding host variable when the data is FETHC or select, indicating that the variable holds the corresponding column length · Oracle will report a 1405 error if you do

user_00@xxxx64:~> Cat/proc/net/dev inter-| Receive | TransmitFace | Bytes Packets Errs Drop FIFO frame Compressed multicast | Bytes Packets Errs Drop FIFO colls carrier compressedeth0:0 0 0 0 0 0 0 0 0 0 0 0 0 0 0-0eth1:67437819880 552776948 0 0 0 0 0 6 63179118041 486899714 0 0 0 0-0 0lo:2338316682 34154992 0 0 0 0 0 0 2338316682 34154992 0 0 0 0-0 0tunl0:0 0 0 0 0 0 0 0 0 0 0 0 0 0 0-0sit0:0 0 0 0 0 0 0 0 0 0 0 0 0 0 0-0 ip6tnl0:0 0 0 0 0 0 0 0 0 0

", SQLCA.SQLERRM.SQLERRML,SQLCA.SQLERRM.SQLERRMC); EXEC SQL ROLLBACK work RELEASE;}voidMain () {EXEC SQL whenever SQLERROR do Sqlerr (); EXEC SQL Connect:serverid; printf ("Connect ok!\r\n"); EXEC SQL whenever not FOUND CONTINUE; EXEC SQLSelectIda,idb,name Into:ida1,:idb1,:name1:name_ind fromT2; //Sqlca.sqlerrd[2] Gets the number of records queried by the SQL statement intcount=sqlca.sqlerrd[2]; //Terminal Print Data intI=0; for(i=0; i) { if(name_ind[i]==-1) {printf ("Arti

(name1,0,sizeof(name1)); printf ("\ r \ n Enter the value of name to query:"); Gets (NAME1); if(name1[0]=='0') { Break; } //Dynamic SQL the third type//prepare a fixed SQL statement//Mypresql: Preparing the identifier for the SQL statement//: A and: B: Not a host variable, but a placeholderEXEC SQL PREPARE Mypresql from'Select Ida,idb,name from T2 where Name=:a'; //Defining Cursors EXEC SQL DECLARE c CURSOR for Mypresql; //open a cursor, pass in a parameter