Tags: Linux virtual machine KVM data recovery mistakenly deletedone, virtual machine failure Environment DescriptionThe client's physical machine operating system is a Linux system, and the file system is the EXT4 file system. The KVM virtual machine on it is deleted, each virtual machine contains a disk file in Qcow2 format, and a disk file of approximately 1.2T in raw format, mainly to restore RAW format disk files. Customer has backed up on their o
Faults in Oracle are divided into the following 4 types.1) Statement failureA logical failure occurred during the execution of the SQL statement when the statement failed. For example, inserting invalid data into a table that violates a constraint, or if there is no space in the table space, the data cannot be inserted. At this point, the application person or DBA will handle the situation accordingly and can.2) User Process failureWhen a user program fails to access the Oracle database, a user
In the implementation of a requirement in the Remcovery mode, in the/cache/recovery/directory to create a log file to record the relevant log information, in order to read the log information after the boot, and then according to the log information to make corresponding processing, But it is strange that every time the file is not automatically deleted by the system, and the system's original log files (such as upgrade log---last_log_r) are still ret
One, the recovery of control files1, the path of the query control fileSQL>SELECT* from v$controlfile; STATUS NAME is_recovery_dest_file block_size file_size_blks------------------------------------- -----------------------------------------------------------------------------16384594 163845942. Delete the control fileSql> shutdownimmediate; The database is closed. The database has been uninstalled. The ORACLE routine has been closed. SQL>host del D:
Server RAID 5 Data recovery caseThis shared case is a RAID disk array in a server, with 12 disks in the disk array, a single-disk capacity 500g,ext3 file system, and a Linux platform for the system platform. Raid in 2nd and 6th, two hard disks reported yellow lights, management personnel after the check on the 6th plate has been forced on-line operation, forced on-line found that most of the directory can not open, there are some directories in the di
My colleague Xiao Wang has a serious problem with the Windows XP system that needs to be reinstalled. This can make Xiao Wang angry, reload system means not only to the system of all the upgrade patch reinstall, but also to install all the software again, this will not waste a lot of time?
In fact, Windows XP users need to do the prevention work ahead of time, restore their own computer system is not so cumbersome. Because you have a weapon in your Windows XP system that restores your system-th
2.1. Data Recovery strategy determines Backup strategyYou are designing a backup strategy. If the data recovery needs and data recovery strategy starts. Each type of data recovery requires that you take the appropriate backup type.Failure occurs in user error, data File block corruption, media failure. The speed at whi
Tags: name error technology share replacement how to query Flash recovery free related informationOracle 11g R2 Rman BackupDefinition and classification of backup and recovery Definition and classification of backup: 备份就是把数据库复制到转储设备的过程。其中,转储设备是指用于放置数据库副本的磁带或磁盘。通常也将存放于转储设备中的数据库的副本称为原数据库的备份或转储。备份是一份数据副本,从不同的角度分类如下: From a physical and logical point of view: From physical and logical, backups can be divid
location is 0 outside the area, often referred to as negative tracks. Similarly, as with the file, due to sudden power outages and negative tracks, and so on, can also cause firmware information loss or corruption, which causes the hard disk to be recognized or mistaken, so that the data can not read properly. In this case, the PC3000, HRT and other disk underlying tools for the firmware area can be rewritten or modified to read the data normally. However, the problem of the firmware area of th
Label:monmatchledcheck cause Fault alsconfig data type Data type MongoDB 3.x data capacity GB Failure type Server power loss causes WIREDTIGER.WT file corruption Start error detected data files in E:\DTLFolder\MongoDB\ Data created by the ' Wiredtiger ' storage engine, so setting the active storage engine to ' Wiredtiger '. 2018-05-08t16:10:09.755+0800 I STORAGE [initandlisten] Wiredtiger_open config:create,cache_size=18g,session_ Max=20000,eviction= (threads_max=4), config_base=false,stati
Label:1. Environment Readiness 1.1 Confirm database version1.2 Confirming database archiving1.3 Backing Up Database files2 The database recovery after the analog control file is lost (Full recovery).2.1 Viewing Control file Locations2.2 Deleting a control file after performing an action2.3 Starting the databaseStart the database when the database error occurred, prompted unable to confirm the control file,
Operation Steps:
Factory pre-installed dos for Windows 8 hidden partition One-click Recovery 8.0 You can set up an initial backup to restore the initial backup state system use.
The specific actions are as follows:
1. The first time to get the machine, install the operating system Windows 8 system and factory random drive disc;
2. Boot Press F2 appear rescue System 4.0 interface Select one key recovery;
One, example demo Bacula Full recovery function
1. Full recovery via differential backup
Action steps are as follows:
*status status Available for:1: Director 2:storage 3:client 4:all Select daemon Type For status (1-4): 1 f10-64-build-dir version:3.0.2 (July 2009) X86_64-unknown-linux-gnu Redhat Daemon started 21-
Aug-09 15:01, 1 Job run since started. heap:heap=253,952 smbytes=84,808 max_bytes=
1. Top Data Recovery software: http://www.xpgod.com/soft/8368.html
Top Data Recovery software 2015 free cracked version of the function is very strong, recovery rate is very high, the use of the software, you can effectively restore your computer hard disk or U disk, TF card, SD card, Sony Memory stick, such as storage of computer data. The top hard disk data
Case 3--A partial archive log was lost while doing a full recovery (recover database until cancel;)
1. Incomplete recovery based on cancel
--Simulation environment
Sql> Col table_name for A20
Sql> Col Tablespace_name for A10
Sql> select Table_name,tablespace_name from User_tables;
TABLE_NAME Tablespace
-------------------- ----------
DEPT USERS
EMP USERS
BONUS USERS
Salgrade USERS
EMPLOYEES USER
Delete Sam file, clear Administrator account password
Find the password from the SAM file
1.l0phtcrack (LC)
2.LCP
3.SamInside Pro
Third, with net user command to restore the system login user password
Set up new password with password reset disk
V. Modify the screensaver file method
VI. Use software to modify passwords
Windows XP NT Password Recovery Key
Cleanpwd
Offline NT Password Registry Editor
Winternals Administrator ' s ERD Commander 2002/2003
its corresponding transaction: A simple picture example is as follows: Many types of operations are logged in the transaction log. These actions include:
The start and end of each transaction.
Each data modification (INSERT, update, or delete). This includes changes made by system stored procedures or data definition language (DDL) statements to any table, including system tables.
Each allocation or deallocation area and page.
Creates or deletes a table or index.
F
different machine restoresCold Backup Recovery methodA, do not create an instance: (The database name on the source machine is ORCL)① the Oradata directory on the target computer to establish the ORCL folder, copy the source of all the data files and online redo files to this directory.② set up the Orcl folder in the Admin directory on the target machine, and then create the Adump, Bdump, Cdump, Udump, Dpdump, pfile six folders in ORCL.③ the source c
• List the actions that occur when you perform a table space point-in-time restore (TSPITR) • Illustrate the definition of terms used by Tspitr • Determine the conditions that are appropriate for using TSPITR as a solution • Determine the correct target time for point-in-time recovery • Identify situations where tspitr cannot be used and how to resolve them · Perform an automatic tspitr
Tablespace Point-in-time
? Determine what types of failures can occur in Oracle DB? Describe how to optimize instance recovery? Explain the importance of checkpoints, redo log files, and archived log files? Configure the quick recovery area? Configuring Archivelog Mode
Part of the work content
The responsibilities of the database administrator include:? Try to avoid a database failure?extended mean time between failur
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