adding documentation

2016-05-20 16:22:28 +02:00 · 2016-05-20 16:22:28 +02:00 · 1d287a8417
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 # Testing on replica
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+`gh-ost`'s design allows for trusted and reliable tests of the migration without compromising production data integrity.
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+Test on replica if you:
+- Are unsure of `gh-ost`, have not gained confidence into its workings
+- Just want to experiment with a real migration without affecting production (maybe measure migration time?)
+- Wish to observe data change impact