m3 data recovery review

Database review 7 -- recovery, database review 7Database review CH14 recovery 13.1 recovery concept Database SystemRestoreIt refers to the behavior that restores the database from an inconsistent state after a certain "failure" to

the checkpoint occurs Perform an action when a failure occurs: Initialize undo_list and redo_list empty table, find first in reverse order , and update for each transaction in L by log record undo_list , join in sequenceredo_list Perform undo_list and redo_list actions in 13.6 Cache Management (1) log record cacheIf log is cached in main memory, log records (all) are written to disk (so that multiple log records can be output at once, reducing I/O overhead) When the cache is full

naturally come out. Therefore, the first choice is to format the disk. After formatting, the lost capacity will be ready! Do not hesitate to format the confidential USB flash drive. After formatting, drag the data to the USB flash drive again! It seems that the disk space is still 10 MB, regardless of whether the disk is used for formatting. 2. Restore with database recovery software Ask for help in the gr

administrator back up the data to tape last month at the beginning of each month. Then delete the first 4thMonths of data. The realization of the current data and historical data synchronization review, which is a significant advantage of the web system.4 ConclusionThis pap

data is restored.Next, use the 002bin.sql file to recover the full standby time to delete the database between the new data[Email protected] backup]# mysql-uroot-p OPS Enter Password:[Email protected] backup]#Review the database again and find that part of the data between the full backup and the deleted database is a

web| Backup | recovery | data The ability to implement tape backup data is difficult in two ways: first, the overall backup and recovery capabilities of the database provided by MS SQL Server do not directly meet the data rolling backups required by this system. Second, you

. Next, use the 002bin.sql file to recover the full standby time to delete the database between the new data[Email protected] backup]# mysql-uroot-p OPS Enter Password:[Email protected] backup]# Review the database again and find that part of the data between the full backup and the deleted database is also restored!!Mysql> select * from Customers;+----+---------

-time data is restored.Next, use the 002bin.sql file to recover the full standby time to delete the database between the new data[Email protected] backup]# mysql-uroot-p OPS Enter Password:[Email protected] backup]#Review the database again and find that part of the data between the full backup and the deleted database

you with a remedy to solve the problem.The following steps explain how to use Oracle Enterprise Manager cloud control to analyze the database state:1) Select the Emergencymonitoring option from the Performance menu on the Access database home page, which will display the first blocking session in the Hang Analysis table.2) Select the REAL-TIMEADDM option from performance to perform a real-time ADDM analysis.3) After collecting the performance data, c

general description of what is happening in the database, and perhaps provide you with a remedy to solve the problem.The following steps explain how to use Oracle Enterprise Manager cloud Control to analyze database status:1) Select the Emergencymonitoring option from the Performance menu on the Access database home page . This will show the top blocking session in the Hang Analysis table.2) Select the REAL-TIMEADDM option from performance to run the real-time ADDM analysis.3) After collecting

represents 4 of the fields in our user table, and you should think that if we reverse these records, the data can be restored. So here is a thought, that is, you can use the text operation, the update set before and after the string exchange, save to SQL, you can achieve data restoration, but the real implementation is still quite troublesome. Here we introduce the Binlog2sql tool, you do not have to be so