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MySQL Conference Liveblogging: Disaster Is Inevitable – Are You Prepared? (Tuesday 4:25PM)


Posted by Artem Russakovskii on April 15th, 2008 in Databases

  • Suicide
  • having no backups
  • depending on slaves for backup
  • keeping backups on same SAN
  • having a single DBA – Frank didn't like this one at all
  • not keeping binlogs
  • Restoring from backup
    • how much time?
    • uncompressed backup ready to mount?
    • separate network for recovery?
  • In Fotolog, 1TB of data was severely hit.
    • first problem: backup was highly compressed (tar.gz)
    • uncompressing took hours
    • so keep uncompressed backups (at least last N days)
    • it should be mountable, rather than transferable
  • Frank going over recovery modes at http://dev.mysql.com/doc/refman/5.0/en/forcing-recovery.html
  • Row by row recovery
    • row by row recovery (get the range of ids)
    • custom scripts
    • may not be able to use primary key
    • foreign key based retrieval faster
    • lose 4 seconds for each crashed record

      • …

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