Posts Tagged ‘mariadb recovery’

With InnoDB’s Transportable Tablespaces, Recovering Data from Stranded .ibd Files is a Thing of the Past

Thursday, April 26th, 2012

Being a data recovery specialist and having recovered countless GBs of corrupted, and/or stranded, InnoDB data in my days, I am very happy to hear about the new InnoDB Transportable Tablespaces coming in MySQL 5.6!

Back in the day, if you had a stranded .ibd file (the individual InnoDB data file with –innodb-file-per-table option), you basically had nothing (even though that file contained all of the data). This was because unless you had the original instance that that particular .ibd file (table) originated from, there was no way to load it, import, or dump from it. So it was not of much use, though all the data was *right* there.

Thus I created the method of Recovering an InnoDB table from only an .ibd file (I should note that this was before the InnoDB Recovery Tool had been released, which can also be used to recover data from a stranded .ibd file too).

However, if you’ve used either my method or the InnoDB Recovery Tool for such a job, it can be a bit of work to get the data dumped. For those experienced, it goes much faster. But still, you cannot get any faster than just being able to (roughly) import the individual tablespace right into any running MySQL 5.6 instance. :)

Nice work! :)

Note: Again, I must mention this is only in MySQL 5.6, so if you have a stranded .ibd file you need to recover data from pre-5.6, you’ll either need to use my method or the InnoDB Recovery Tool.

 


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