In which directory is the Ibdata file stored?

In which directory is the Ibdata file stored?

By default, this is the ibdata1 file located in the data directory, (as defined by either the datadir or innodb_data_home_dir system variables). InnoDB uses the system tablespace to store the data dictionary, change buffer, and undo logs.

What is MySQL ibdata1 file?

The file ibdata1 is the system tablespace for the InnoDB infrastructure. It contains several classes for information vital for InnoDB. Table Data Pages. Table Index Pages. Data Dictionary.

Can you use InnoDB to store tables per file?

With one common metadata repository, it makes transactional support and MVCC operability possible across multiple databases. You can toggle InnoDB to store tables per file by adding innodb-file-per-table to your cnf. Innodb really just cares about pages of data at a basic level.

Where does MySQL dump a table in InnoDB?

You must MySQL dump to extract a dump of the table as a logical representation of the data and its corresponding index definitions. You would then load that dump to another database on the same server or another server. With innodb_file_per_table enabled, table data and its indexes live in the database folder next to the .frm file.

How big is the ibdata file in MySQL?

But Still I m seeing huge ibdata file ( ~50GB). All tables are having .ibd file as well. This is a machine I have created by taking dump and loading. What is a reason for this. You probably have lots of large transactions or one really big transaction. If you look inside the system table (ibdata1), you see rollback segments and undo logs.

Why does MySQL have multiple tablespaces in InnoDB?

This feature is called “multiple tablespaces” because each table that is created when this setting is in effect has its own tablespace. As to why, the reason is probably the different architectures of the two engines (MyISAM and InnoDB).