docs: clarify pg_upgrade docs regarding standbys and rsync
authorBruce Momjian <bruce@momjian.us>
Sat, 16 Sep 2017 15:58:00 +0000 (11:58 -0400)
committerBruce Momjian <bruce@momjian.us>
Sat, 16 Sep 2017 15:58:00 +0000 (11:58 -0400)
commit04b64b8ddf9926950fe86d7d489825c46665dc01
treee1c8f8a4cef7f4e17bd6f104460d372f9e232293
parent9361f6f54e3ff9bab84e80d4b1e15be79b48d60e
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
doc/src/sgml/ref/pgupgrade.sgml