I want to make this Friday a bit more interesting – how do you feel to train a bit in InnoDB data recovery techniques.
I have .ibd datafile which was created by query
CREATE TABLE `tryme` ( `email` mediumblob, `content` mediumblob ) ENGINE=InnoDB … (SOME PARAMETERS SKIPPED) …;
and I inserted one record into this table with email address and English sentence into field (content). Some transformation where applied to both fields so just HEX viewer may not help you there.
Size of meaningful de-transformed content is
length( … (content) … ) = 15.
Can you recovery both email and content fields ? To add some competition I want to give a prize for winner, first who sends content (meaningful English sentence) to given email – will receive our book “High Performance MySQL” 2nd edition, or if he has already this book or just hate it by some reason – I can propose Amazon 25$ Gift Card as replacement.
File tryme.ibd you can download here http://percona.com/blog/files/contest/tryme.ibd. Size 65536 bytes. md5sum a53d3ee3f3a33854f21b5f550ae53e18.