Does MariaDB support multiple data directories within a single instance?
MySQL 5.6 lets you define separate data directories for individual tables. This is useful if you want to put large tables on a separate storage backend - e.g. frequently used tables go on local disk, and some larger tables go on ISCSI.
Does MariaDB support having multiple data directories within a single running instance?
Answer
In 5.5 you can do it manually with symlinks.
Copy ibd files or whole database directories where you want them and symlink them back. You need to use --innodb-file-per-table, of course.
Innodb pseudo-symlinks via "isl" files are only supported in 5.6.
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