Androidsystemrecoverywork use update.zipupgrade Process Analysis (wuyun---update.zip package to enter the recovery service from the upper layer
In this document, we will refer to the update.zip package from two sources: OTA online download (generally downloaded to the/cache partition) and manual copy to the SD card. This document does not describe the official update.zip package. This zip package is not processed before it enters the
Timeout retransmission is an important mechanism for TCP to ensure data reliability. Its principle is to enable a timer after a data is sent,If no ACK packet is sent within a certain period of time, the data will be re-sent until the message is sent successfully. This is dataA repair mechanism is provided when the package is lost. Generally, retransmission occurs after timeout, but if the sender receives more than threeThe duplicate ack should realize that the data is lost and needs to be re-tra
1.6. Automatic disk-based Backup and recovery:the Flash Recovery areaComponents that create different backup and recovery files have no knowledge of the size of each file system. With automatic disk-based backup and Recovery, you can create a flashback recovery area that automates the management of backup files. Select
• Explains the differences between user-managed backup and recovery and server-managed backup and recovery • Perform user-managed database Full recovery • Perform user-managed database incomplete recovery
Types of use for backup and recovery
Types of database b
In the previous topic, we have actually made a complete introduction to the backup and recovery of rman. We talked about the backup of databases, tablespaces, parameter files, and control files, at the same time, we also talked about their recovery, including catastrophic recovery. The non-consistent recovery that we a
This article describes how to improve the efficiency of DB2 data backup and recovery. When designing a data backup and recovery solution, we mainly consider two aspects.
The first is whether the backup and recovery policies are secure, that is, whether the database can be backed up in a timely and accurate manner.
Second, the efficiency of data backup and
In RAID array data recovery, we often encounter simple structure such as RAID1, RAID0, RAID5 and so on array data recovery, such array data recovery is generally difficult, the data recovery success rate is higher. However, when encountering complex structure of array type, such as composite array structure raid0+1, ra
Today we mainly describe the actual operation steps to improve the efficiency of DB2 data backup and recovery. When designing a data backup and recovery solution, we mainly consider two aspects. The first is whether the backup and recovery policies are secure, that is, whether the database can be backed up in a timely and accurate manner.
Second, the efficiency o
Label:MySQL Engine Features · InnoDB Crash Recovery processIn the previous two monthly report, we introduced the knowledge of InnoDB redo log and undo log in detail, and this article will describe the main process of InnoDB in the case of crash recovery. This article code analysis is based on the MySQL 5.7.7-RC version, the function entry is innobase_start_or_create_for_mysql , this is a very verbose functi
Tags: Open db file Readasa SybaseSQL Anywhere database non-routine recovery toolREADASADB---an industry-leading recovery tool that does not rely on database management systems to extract data directly from DB Files!I. Introduction to SQL Anywhere, UltraliteSQL Anywhere A maintenance-free, easy-to-manage mobile database.SQL Anywhere provides enterprise-class functionality, including full transactional proces
3.4 Replay Transaction logOnce we have created an initial base backup of our own, we can collect the Xlog created by the database. When the time comes, we can use all these xlog files and perform the recovery process we expect. This works as described in this section.Perform basic recoveryIn PostgreSQL, the entire recovery process has a file management called recover.conf, which resides primarily in the hom
Oracle databases can achieve Incomplete recovery and full recovery of databases. Full recovery is to restore the database to the latest time, that is, lossless recovery, to ensure that the database is not lost
Oracle databases can achieve Incomplete recovery and full
Microsoft ExchangeServer2010 includes a new unified framework for mailbox recovery, which includes some new features, such as database availability Group (DAG) and mailbox database copy. Although these new features can be deployed quickly and easily, you must first carefully plan to ensure that any high availability and site recovery solutions that use these features meet the intended purpose and business r
This article mainly introduces how to correctly improve the efficiency of DB2 data backup and recovery, including understanding the logical storage structure of data and rational planning of tablespaces to improve database backup and recovery performance, as well as the alternative processing methods for LOB data types such as images and setting appropriate concurrency and cache for the system to improve da
The following articles mainly describe the actual operations that greatly increase the efficiency of database backup and recovery in DB2. It takes N hours to back up or restore a DB2 database, therefore, the timely backup and recovery solution is no matter whether it is safe.
Or an inappropriate solution. Therefore, while considering the security of the backup and recov
noun Explanation:As the name implies, full recovery means the recovery of data without loss. Incomplete recovery refers to some data loss after recovery. They are two ways to recover a database.Full recovery: Restores a block of data to a point in time closest to the current
DB2 redirection recovery and rollback FAQ analysis preface an important part of database management and maintenance is to regularly back up and restore the database. In addition to data preservation and system disaster tolerance, the importance of this kind of work is also manifested in the development and testing of application systems to build a database environment. Imagine that in an application environment that is constantly updated and upgraded,
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-- Oracle instance recovery
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I. Oracle instance failure
Oracle instance failures are mostly caused by instance non-consistent shutdown, which is usually called a crash ). The instance failure result is equivalent to shutdown abort.
Cause of instance failure
Power Load failure
Hardware faults
Background process failed
Shut down database exceptions
Status after instance
Tags: platform star returns use logical contains recover logic on serverDatabase recovery is the operation that corresponds to a database backup, which is the process of reloading a database backup into the system. Database recovery can create related files that exist in the database when the backup is complete, but all database modifications after the backup are lost.When SQL Server is recovering from a da
continue to update the database:Backup database mydb TABLESPACE myspace1 online to/backup/mydb
Table 1: Impact of database Forward Recovery
If forward recovery is not allowed
If forward recovery is allowed
After a failure occurs, you can restore the database to the State consistent with the last transaction before the failure.
Likewise, i
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