locked_switcher.rb in lhm-1.1.0

- old
+ new

@@ -4,14 +4,10 @@
 require 'lhm/command'
 require 'lhm/migration'
 require 'lhm/sql_helper'
 
 module Lhm
-  # Switches origin with destination table with a write lock. Use this as
-  # a safe alternative to rename, which can cause slave inconsistencies:
-  #
-  #   http://bugs.mysql.com/bug.php?id=39675
-  #
+  # Switches origin with destination table nonatomically using a locked write.
   # LockedSwitcher adopts the Facebook strategy, with the following caveat:
   #
   #   "Since alter table causes an implicit commit in innodb, innodb locks get
   #   released after the first alter table. So any transaction that sneaks in
   #   after the first alter table and before the second alter table gets