On Wed, Feb 5, 2014 at 3:14 PM, Amit Kapila <amit.kapil...@gmail.com> wrote: > On Wed, Feb 5, 2014 at 10:30 AM, James Sewell <james.sew...@lisasoft.com> >> I've seen some proposals and a tool (pg_rewind), but all seem to have draw >> backs. > > As far as I remember, one of the main drawbacks for pg_rewind was related to > hint bits which can be avoided by wal_log_hints. pg_rewind is not part of > core > PostgreSQL code, however if you wish, you can try that tool to see if can it > solve your purpose. For 9.3, pg_rewind is only safe with page checksums enabled. For 9.4, yes wal_log_hints or checksums is mandatory. The code contains as well some safety checks as well to ensure that a node not using those parameters cannot be rewinded. Regards, -- Michael
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