1. bkp can be used to save data
Bkp contains 42 16-bit registers that can store 84 bytes of content. They are powered by vbat for dimension mounting.
2. Data stored in bkp can be destroyed (if someone wants to maliciously obtain the data, it is more important to lose it than to protect it ). Stm32 provides a mechanism called tamper. Intrusion detection, which occ
RTC (Real Time clock): Realtime clockBCD code: 4-bit 2 binary to represent the decimal form within 10.RTC Clock Source: LSE (32.768KHZ), HSE_RTC, LSI. After a precise calibration (RTC_CALR). The 7-bit prescaler is then divided (rtc_prer, default 127+1=128) to produce a ck_apre () clock. Again after a rough calibration (RTC_CALPR). Then go through Rtc_prer (a synchronous 15-bit Prescaler (default value =256), Shadow Register (RTC_SSR)). Then, generate a Ck_spre (default 1HZ) for the true RTC core
Control filesRMAN> RESTOREControlfile fromAutobackup;--The control file is restored to the initialization parameter: Control_files the specified path. StartRestoreIn +-December- -Use the target database control file instead of the channel for recovering directory allocations: Ora_disk_1 Channel Ora_disk_1:sid=TenDevice type=DISKRecovery Zone target: D:\app\Administrator\flash_recovery_area the database nam
so that the control file takes effect and proofread and synchronize the control file version. Then we use RESETLOGS to open the database. Because the log file is cleared and the previous backup is invalid, we should back up the database again. This is crucial.
We can also use the RUN Command to write all operations into a human script, which can reduce many oper
RMAN --- deleteobsolete cannot delete control file copy description tmpcontrlfiletmpcontrolfilebkphomeoraclecontrol01ctl has been deleted through the OS command the question is how to delete these obsolete records: the following is a copy description of the control file/tmp/contrlfile/tmp/controlfile that cannot be deleted during the test of RMAN --- delete obsolete. bk
File type, C language file read/write, File Buffer, file opening method, file operation functionFile types include stream files and device files. device files such as VGA interfaces, serial ports, USB ports, network ports, and serial ports are abstracted into files by the op
SpringMVC single file upload, multi-File Upload, file list display, file download, springmvc File Upload
Original works of Lin bingwen Evankaka. Reprinted please indicate the source http://blog.csdn.net/evankaka
This document describes in detail the single
recovery parameter file is configured. Oracle searches for a backup set with the specified name under $ ORACLE_HOME/dbs. According to the error message, by default, it searches for the control file backup set created in the past seven days in this directory (you can add maxseq and maxdays to change the default days). If it is not found, an error is returned. Go to the $ ORACLE_HOME/dbs directory and check
about implementation and introduction in the program notes.
File Submission page: (can be submitted separately to doaction.php, doaction1.php, doaction2.php for testing)
upload.php
File Upload
doaction.php
doaction1.php
doaction2.php
$maxSize) {exit (' upload file too large '); } echo $fileInfo [' type ']; Exit $ext = Strtolow
# Region: determines whether a file exists. If the file does not exist, it is created. Otherwise, the read value is displayed in the form.
PublicFormmain ()
{
Initializecomponent ();
// Readfile (application. startuppath + "// alarmset.txt ");
// Determine whether a file exists
// System. Io. directoryinfo info = new system. Io. directoryinfo (applica
Enter a filename and path to create the file, save the input from the keyboard to the file, and finally output the path to the file, the file name, and the contents of the file to the screen.
#include
Import java.io.*;Class Sortchar{Private String str;Private Char arraylist[];Private BufferedReader BR; Character StreamPrivate File F; Read the fileSortchar (String s){F=new File (s);}public void Start (){if (Inputdata () ==-1){Return}To bubble sort a character arraySortchar ();Turns the sorted array into a string and writes the string to the B.txt file through t
(s) in backup set
Including current control file in backup set
Channel ORA_DISK_1: starting piece 1 at 23-FEB-14
Channel ORA_DISK_1: finished piece 1 at 23-FEB-14
Piece handle =/u01/app/oracle/flash_recovery_area/ORCL/backupset/2014_02_23/empty _. bkp tag = TAG20140223T094340 comment = NONE
Channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 23-FEB-14
-- Backup the database a
statement:
Alter Database Backup controlfile to 'e: \ oraclebackup \ Control. bkp ';
Produce SQL statements that can later be used to re-create your control file:
Alter Database Backup controlfile to trace;
This command writes a SQL script to the database trace file where it can be captured and edited to reproduce the control
Rman backed up db when: Waiting for snapshot control file Enqueue prompt, rarely see this hint, recorded.
Rman> run{
2> backup Database;
3> Delete noprompt obsolete;
4> backup Archivelog all;
5>}
Starting backup at 2011-09-30 15:31:00
Using channel Ora_disk_1
Channel ora_disk_1:starting full datafile backupset
Channel ora_disk_1:specifying DataFile (s) in Backupset
Input datafile fno=00001 name=g:oracleproduct10.2.0oradataorclsystem01.dbf
I
So far, the input and output we have discussed is the object of the system-specified standard device (the input device is the keyboard and the output device is the monitor). In real-world applications, disk files are often used as objects. The data is read from the disk file and the data is output to the disk file. Disk is the external memory of the computer, it can retain information for a long time, can r
Non-critical data files are missing (can be lost offline data files):run{SQL ' ALTER DATABASE datafile Restore DataFile Recover DataFile SLQ ' ALTER DATABASE datafile }In addition to the system, the Undo_tablespace parameter after the value of the table space can be recovered using the above method.[Email protected] ~]$ ls/u01/oracle/oradata/jadl10g/Control01.ctl control03.ctl redo01.log redo03.log system01.dbf undotbs01.dbfControl02.ctl example01.dbf redo02.log sysaux01.dbf temp01.dbf users01.d
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