MySQL Partitioning

MySQL Partitioning MySQL partitioning is supported by partitioning multiple systems and servers for file systems and servers, and a single database. MySQL partitions are done on tables, not file systems or servers. With table partitioning, tables can be stored in multiple storage areas. MySQL uses row splitting called "horizontal splitting". In version 5, MySQL does not allow column partitions to be called "vertical partitions", it is not under development.

But what happens if the table is still large after the user partition and you need to delete the old line? You can still get faster data than delete. In this case, try MySQL's embedded table partitioning. This is useful when you need to cut a table with ordinal values ​​or values ​​defined on a continuous scale (such as creating timestamps). It should be self explanatory from the beginning. Each partition contains a value that the created_at column is smaller than the next day's date. This also means that from20120414 saves all the data before 2012-04-15. Therefore, this is the partition to destroy when performing cleanup.

Prior to 5.1.2 MySQL 5.1.x and 6.0.4 prior to 6.0.x, remote authenticated users should use table-level DATA DIRECTORY and INDEX when creating partition tables with the same name The DIRECTORY option, which includes the DIRECTORY option, acts as a table for unauthorized users. Perhaps the previous Bacula 2.2.5 Make_catalog_backup sends a MySQL password as a command line argument, sometimes a plaintext e-mail containing this command line, and a context-sensitive attacker lists the process and its parameters and gets the password It makes it possible. Or by sniffing the network

Prior to MySQL 5.0.67, local users could change the (1) DATA DIRECTORY or (2) INDEX DIRECTORY parameters by calling CREATE TABLE on the MyISAM table. Allow local users to bypass specific permission checks to create future path names to include subdirectories symbolically linked to the MySQL path master data directory in the future. Note: This vulnerability exists due to incomplete modification of CVE - 2008 - 4097. Prior to 5.1.2 MySQL 5.1.x and 6.0.4 prior to 6.0.x, remote authenticated users should use table-level DATA DIRECTORY and INDEX when creating partition tables with the same name DIRECTORY option as a table for unauthorized users including