While learning a bit about basic hot standby configuration, I was reviewing an article that used these parameters
wal_level = 'hot_standby'
archive_mode = on
archive_command = 'cd .'
max_wal_senders = 1
hot_standby = on
How or why that particular archive_command actually works (... and it does ... I tried it ...) is not clear to me based
onreading of the Postgresql documentation on this topic. I would have expected to see an actual copy or rsync command,
asdescribed in the fine manual at section 25.3.1. "Setting Up WAL Archiving"
The entire example appears at
https://www.digitalocean.com/community/tutorials/how-to-set-up-master-slave-replication-on-postgresql-on-an-ubuntu-12-04-vps
Can anyone enlighten on this topic, or provide a link to an existing explanation?
-- B