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If your database becomes corrupted or disk failure occurs, you must perform the recovery using a backup. Mysqld displays output something like this: InnoDB: Database was not shut down normally.InnoDB: Starting recovery from log files.InnoDB: Starting log scan based on checkpoint atInnoDB: log sequence number 0 13674004InnoDB: Doing recovery: scanned up to log sequence number 0 13739520InnoDB: Doing recovery: scanned up to log sequence number 0 13805056InnoDB: Doing recovery: scanned up to log sequence number 0 13870592InnoDB: Doing recovery: scanned up to log sequence number 0 13936128.InnoDB: Doing recovery: scanned up to log sequence number 0 20555264InnoDB: Doing recovery: scanned up to log sequence number 0 20620800InnoDB: Doing recovery: scanned up to log sequence number 0 20664692InnoDB: 1 uncommitted transaction(s) which must be rolled backInnoDB: Starting rollback of uncommitted transactionsInnoDB: Rolling back trx no 16745InnoDB: Rolling back of trx no 16745 completedInnoDB: Rollback of uncommitted transactions completedInnoDB: Starting an apply batch of log records to the database.InnoDB: Apply batch completedInnoDB: Startedmysqld: ready for connections InnoDBĪutomatically rolls back uncommitted transactions that were present at the time of the crash. InnoDBĪutomatically checks the logs and performs a roll-forward of the database to the present. To recover from a crash of your MySQL server, the only requirement is to restart it. ToĪchieve point-in-time recovery after restoring a backup, you can apply changes from the binary log that occurredħ.5, "Point-in-Time (Incremental) Recovery Using the Binary Log". To recover your InnoDB database to the present from the time at which the binaryīackup was made, you must run your MySQL server with binary logging turned on, even before taking the backup.
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To keep a copy of your database at database sites requiring high availability. Replication works with InnoDB tables, so you can use MySQL replication capabilities See Section 7.3.1, "Establishing a Backup mysqldump also has a -single-transaction option for making a consistent snapshot without locking Also, because the format is simpler, the chance for serious data corruption is smaller. Dumped tables are stored into text files that are human-readable, so spotting table corruption becomesĮasier. A binary file might be corrupted without you noticing In addition to making binary backups as just described, regularly make dumps of your tables with mysqldump. Shutdown of the MySQL server and make sure that it stops without errors.Ĭopy your my.cnf configuration file or files to a If you can shut down your MySQL server, you can make a binary backup that consists of all files used by InnoDB to manage its tables. For more details, see SectionĢ3.2, "MySQL Enterprise Backup". MySQLĮnterprise Backup is part of the MySQL Enterprise subscription. In conjunction with MySQL's binary log, users can perform point-in-time recovery. MySQL Enterprise Backup can also create compressed backup files, and back up subsets
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During the copying of MyISAM tables, reads (but not writes) to Tables, reads and writes to both InnoDB and MyISAM The mysqlbackup command, part of the MySQL Enterprise BackupĬomponent, lets you back up a running MySQL instance, including InnoDB and MyISAM tables, with minimalĭisruption to operations while producing a consistent snapshot of the database. Servers, and database workload, you can use these techniques, alone or in combination: hotīackup with MySQL Enterprise Backup cold backup by copying files while theīackup for fast operation (especially for restore) logical backup with mysqldump for smaller data volumes or to record the Depending on your data volume, number of MySQL The key to safe database management is making regular backups. Backing Up and Recovering an InnoDB Database Please note: The 30-day money-back guarantee applies to our hosting plans it does not apply to most add-on services, such as domains, as mentioned above.14.2.2.4.
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