The Importance Of MySQL Database Migration
Strangely, while many people can ill afford to lose their data on their computers, many people do not take the time to do any backup of this data. This applies mainly to people who work from home. Many companies do have backups in place and the boss will generally enforce that the staff members carry this out. For those who are now realizing the importance of this, they will need to find out about MySQL database migration.
Even though MySQL enjoys a fair amount of popularity, not many third-party backup tools exist in order for data to backed up. People will have to find out about applications that will avoid the corruption of the data. Furthermore, sometimes only some of the data is saved. Both theses scenarios can be problematic should the PC crash for any reason.
One issue to consider is whether this should be backed up online or offline. In order to avoid any downtime, online backups are often the way many people choose. Offline however creates less errors and one does not need to be worried about orphaned processes, running transactions, table locks or any other things that can and do go wrong.
People who are able to afford some downtime or if they have master-slave replication then offline could well be the better option. A data dump is a sequence whereby the database is recreated. This is a rather costly exercise though, as the additional SQL syntax means larger files. Larger files are more intensive on the CPU (Central Processing Unit). Furthermore, while the data is being resorted a full index rebuild is required.
A raw snapshot of the MySQL files is believed by many to be the better option of backing up data. This is because they are on a disk. As all the conversion steps are skipped it is considered to be much more efficient than dumps.
For adequate backup of a MyISM table, the data and the index files will need to be copied. Certain tool-kits are available to help one with this. These will suit smaller businesses as the efficiency of the process is not that great. Larger businesses cannot afford to take that risk.
Some programs will perform a complete raw backup of data that consists of ISIAM or MyISAM tables. This is possible due to the read-lock on all tables. The tables are copied and the lock is then released. One should be sure about MySQL database migration so that critical data is not lost.
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