Classification: External
Hi Pathiria,
Step1:- Enable the below parameters in postgresql.conf file for hotstandby
wal_level=replica [ Default : hot_standby]
wal_log_hints = on
synchronous_commit = on
wal_log_hints = on
archive_mode = on [
archive_timeout = 30
archive_command = 'scp %p 172.30.8.199:/data/ARCHIVELOG/%f'
step 2:- #Replication
max_wal_senders = 10
wal_keep_segments = 3200 # in logfile segments, 16MB each; 0 disables[
hot_standby = on
hot_standby_feedback = on # send info from standby to prevent query conflicts
#Log file configurations
log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log'
log_rotation_age = 0
log_rotation_size = 100MB
log_timezone = 'GMT'
Step3:- backup master database then transfer into replica server by using rsync
[postgres@de284194 ~]$ psql -c "SELECT pg_start_backup('label', true)"
pg_start_backup
-----------------
10/DA000028
(1 row)
[postgres@de284194 pg_data]$ rsync -cva --inplace --exclude=*pg_xlog* \
> ${PGDATA}/ 172.29.7.194:$PGDATA
sending incremental file list
./
pg_wal/archive_status/0000000100000010000000CC.done
pg_wal/archive_status/0000000100000010000000CD.00000028.backup.done
pg_wal/archive_status/0000000100000010000000CD.done
pg_wal/archive_status/0000000100000010000000D5.done
pg_xact/
pg_xact/0000
sent 1,053,663,924 bytes received 21,480 bytes 15,160,941.06 bytes/sec
total size is 1,053,341,161 speedup is 1.00
[postgres@de284194 pg_data]$
Step 4:- Stop the backup
[postgres@de284194 pg_data]$ psql -c "select pg_stop_backup(), current_timestamp"
NOTICE: pg_stop_backup complete, all required WAL segments have been archived
Step 5;- Create recovery.conf
postgres=# SELECT pg_create_physical_replication_slot('amos_prod_replica1');
pg_create_physical_replication_slot
-------------------------------------
(amos_prod_replica1,)
(1 row)
Start the db server in replica server:-
Regards,
Ashok
On Fri, Apr 24, 2020 at 12:00 AM Ashok kumar Mani <amani@xxxxxxxxxxxxx> wrote:
Did you include the replication slot name in your recovery.conf?. Also, I would recommend using the pg_basebackup tool to build your replica vs rsync. We've created an interactive tutorial on making streaming replicas with replication slots here if you want to see how that can be done. This is for PG11, but the process for 10 is the same.
Keith
