emerge --sync

LINGUAS="ru" ACCEPT_KEYWORDS="~amd64" emerge -av  /usr/portage/dev-db/postgresql-server/postgresql-server-9.0.1.ebuild

emerge --config =dev-db/postgresql-server-9.0.1

pg_dumpall -p 5432 | psql -d postgres -p 6543

LINGUAS="ru" ACCEPT_KEYWORDS="~amd64" emerge -av  /usr/portage/dev-db/postgresql-server/postgresql-server-9.0.1.ebuild

$ $EDITOR postgresql.conf
listen_addresses = '10.0.xx.yy'
 
$ $EDITOR pg_hba.conf
# The standby server must have superuser access privileges.
host  replication  postgres  10.0.xx.zz/22  trust

$ $EDITOR postgresql.conf
 
# To enable read-only queries on a standby server, wal_level must be set to
# "hot_standby". But you can choose "archive" if you never connect to the
# server in standby mode.
wal_level = hot_standby
 
# Set the maximum number of concurrent connections from the standby servers.
max_wal_senders = 5
 
# To prevent the primary server from removing the WAL segments required for
# the standby server before shipping them, set the minimum number of segments
# retained in the pg_xlog directory. At least wal_keep_segments should be
# larger than the number of segments generated between the beginning of
# online-backup and the startup of streaming replication. If you enable WAL
# archiving to an archive directory accessible from the standby, this may
# not be necessary.
wal_keep_segments = 32
 
# Enable WAL archiving on the primary to an archive directory accessible from
# the standby. If wal_keep_segments is a high enough number to retain the WAL
# segments required for the standby server, this may not be necessary.
archive_mode    = on
archive_command = 'cp %p /var/archive/%f'

/etc/init.d/postgresql-9.0 start

$ psql -c "SELECT pg_start_backup('label', true)"
$ rsync -a /var/lib/postgresql/9.0/data/ 10.0.xx.zz:/var/lib/postgresql/9.0/data/ --exclude postmaster.pid
$ psql -c "SELECT pg_stop_backup()"

$ $EDITOR postgresql.conf
 
hot_standby = on

$ $EDITOR recovery.conf
 
# Specifies whether to start the server as a standby. In streaming replication,
# this parameter must to be set to on.
standby_mode          = 'on'
 
# Specifies a connection string which is used for the standby server to connect
# with the primary.
primary_conninfo      = 'host=10.0.xx.yy port=5432 user=postgres'
 
# Specifies a trigger file whose presence should cause streaming replication to
# end (i.e., failover).
trigger_file = '/var/lib/postgres/trigger'
 
# Specifies a command to load archive segments from the WAL archive. If
# wal_keep_segments is a high enough number to retain the WAL segments
# required for the standby server, this may not be necessary. But
# a large workload can cause segments to be recycled before the standby
# is fully synchronized, requiring you to start again from a new base backup.
restore_command = 'cp /var/archive/%f "%p"'

/etc/init.d/postgresql-9.0 start

cat test.sh
#!/bin/bash
# inserts to master
psql <db> <user> < users_logs.sql
#select from master
psql -U <user> -h <master_IP> <db> -c "select count(*) from users_logs;"
#select from slave
psql -U <user> -h <slave_IP> <db> -c "select count(*) from users_logs;"

Master count 
-------
  7484
(1 row)
 
Slave count 
-------
  7468
(1 row)