docs: clarify pg_upgrade docs regarding standbys and rsync
Document that rsync is an _optional_ way to upgrade standbys, suggest
rsync option --dry-run, and mention a way of upgrading one standby from
another using rsync. Also clarify some instructions by specifying if
they operate on the old or new clusters.
Reported-by: Stephen Frost, Magnus Hagander
Discussion: https://postgr.es/m/20170914191250.GB6595@momjian.us
Backpatch-through: 9.5
Branch
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REL9_5_STABLE
Details
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https://git.postgresql.org/pg/commitdiff/2efe122c5a479c03493995adadc8c80bec8015da
Modified Files
--------------
doc/src/sgml/ref/pgupgrade.sgml | 41 ++++++++++++++++++++++++-----------------
1 file changed, 24 insertions(+), 17 deletions(-)
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