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Now, suppose that we have a catastrophic unexpected exit on Wednesday at 8 a.m. that requires recovery from backups. To recover, first we restore the last full backup we have (the one from Sunday 1 p.m.). The full backup file is just a set of SQL statements, so restoring it is very easy:
3.3.2 Creating a Table 3.3.3 Loading Data into a Table 3.3.4 Retrieving Information from a Table 3.4 Getting Information About Databases and Tables 3.5 Using mysql in Batch Mode 3.6 Examples of Common Queries 3.6.1 The Maximum Value for a Column 3.6.2 The Row Holding the Maximum of a Certain Column 3.6.3 Maximum of Column per Group 3.6.4 The. Aruba Instant Validated Reference Design - V2.0 by rpavithran on 12:09 PM. 0 Comments 72694 Views 0 Comments. Analog Devices offers the widest selection of high performance voltage references in the industry. Our products range from high accuracy, low noise for high end industrial applications to general-purpose, low power for handheld, battery-powered applications. ADI is the ultimate source for design. 2.3.3.5 MySQLInstallerConsole Reference MySQLInstallerConsole.exe provides command-line functionality that is similar to MySQL Installer. It is installed when MySQL Installer is initially executed and then available within the MySQL Installer directory.
At this point, the data is restored to its state as of Sunday 1 p.m.. To restore the changes made since then, we must use the incremental backups; that is, the gbichot2-bin.000007
and gbichot2-bin.000008
binary log files. Fetch the files if necessary from where they were backed up, and then process their contents like this:
We now have recovered the data to its state as of Tuesday 1 p.m., but still are missing the changes from that date to the date of the crash. To not lose them, we would have needed to have the MySQL server store its MySQL binary logs into a safe location (RAID disks, SAN, ...) different from the place where it stores its data files, so that these logs were not on the destroyed disk. (That is, we can start the server with a --log-bin
option that specifies a location on a different physical device from the one on which the data directory resides. That way, the logs are safe even if the device containing the directory is lost.) If we had done this, we would have the gbichot2-bin.000009
file (and any subsequent files) at hand, and we could apply them using mysqlbinlog and mysql to restore the most recent data changes with no loss up to the moment of the crash:
For more information about using mysqlbinlog to process binary log files, see Section 7.5, “Point-in-Time (Incremental) Recovery”.