mysql - How to covert Innodb table to myisam tables in minimum downtime -


we have 250gb mysql innodb databases, performance reason have convert in myisam on production, optimal solution in minimum downtime

i'd imagine like:

  • create myisam copy of table.
  • add/modify triggers on original table "sync" changes copy.
  • incrementally copy old data original table copy; update , delete triggers should keep copied data date. (depending on specific table's structure , how incrementally copying, insert trigger may unnecessary or counter productive).
  • drop foreign keys referencing original table.
  • rename original table , rename copy original table's name.

it won't fastest process, can't see having less downtime renaming couple tables.


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