Guillaume Lelarge wrote: > Ivan Voras a écrit : >> It looks like PostgreSQL freezes the state of the "data" directory in >> this case (and new data goes only to the transaction log - pg_xlog), >> which effectively creates an application-level snapshot. Good to know. > > Nope. Even files in data directory change. That's why the documentation > warns against tools that emit errors for files that change during the copy. Ok, thanks. This is a bit off-topic, but if it's not how I imagine it, then how is it implemented?
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