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normal shutdown caused data loss
Posted by: lynda patterson
Date: May 15, 2009 03:38PM

I rebooted my server after some kernel updates this week, and when MySQL came back up the InnoDB tables were reverted back in time by 3 weeks!

I only have experience with backup and recovery on MyISAM tables (those were fine), so I have always just taken filesystem backups while the database was online. Unfortunately, in my tape backups the file mod time on the ibdata files and iblogfiles is that same 3-weeks-ago time (April 23).

I did not have the log-bin setting configured, so no binary logs (I just learned about these), and the parameter innodb_fast_shutdown=1. I wonder if either of these could have saved me?? Is there any way to recover the missing data, or did it get dumped when the server rebooted? Please help!

Logfile:
090513 14:01:10 [Note] /usr/libexec/mysqld: Normal shutdown

090513 14:01:10 InnoDB: Starting shutdown...
090513 14:01:14 InnoDB: Shutdown completed; log sequence number 0 145650203
090513 14:01:14 [Note] /usr/libexec/mysqld: Shutdown complete

090513 14:01:14 mysqld ended

090513 14:04:54 mysqld started
090513 14:04:54 InnoDB: Database was not shut down normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages from the doublewrite
InnoDB: buffer...
090513 14:04:54 InnoDB: Starting log scan based on checkpoint at
InnoDB: log sequence number 0 143116820.
InnoDB: Doing recovery: scanned up to log sequence number 0 143116820
InnoDB: Last MySQL binlog file position 0 0, file name
090513 14:04:54 InnoDB: Started; log sequence number 0 143116820
090513 14:04:55 [Note] /usr/libexec/mysqld: ready for connections.



Edited 1 time(s). Last edit at 05/15/2009 03:40PM by lynda patterson.

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