Dear all,
I am trying to setup PITR for online backup and also to create a more robust
setup, in case our primary Postgres dies.
I am testing this setup on Centos 5.4, Postgres version: 8.1.18 (not sure why
Centos has this old version by default).
I have enabled PITR, with the following commands:
/var/lib/pgsql/data/postgresql.conf
archive_command = on
archive_command = 'cp -i %p /data/pgsql/archives/%f </dev/null'
I have created the folder: /data/pgsql/archives and changed ownership to
postgres:postgres
I can see the archiving seems to be working:
Ls -ls /data/pgsql/archives
16404 -rw------- 1 postgres postgres 16777216 Jan 13 10:12
000000010000000000000000
16404 -rw------- 1 postgres postgres 16777216 Jan 13 10:12
000000010000000000000001
16404 -rw------- 1 postgres postgres 16777216 Jan 13 10:12
000000010000000000000002
16404 -rw------- 1 postgres postgres 16777216 Jan 13 10:12
000000010000000000000003
16404 -rw------- 1 postgres postgres 16777216 Jan 13 12:59
000000010000000000000004
4 -rw------- 1 postgres postgres 247 Jan 13 12:41
000000010000000000000004.00C18E68.backup
16404 -rw------- 1 postgres postgres 16777216 Jan 13 12:59
000000010000000000000005
16404 -rw------- 1 postgres postgres 16777216 Jan 13 12:59
000000010000000000000006
16404 -rw------- 1 postgres postgres 16777216 Jan 13 12:59
000000010000000000000007
16404 -rw------- 1 postgres postgres 16777216 Jan 13 12:59
000000010000000000000008
I have done the base backup:
Psql
select pg_start_backup('Full Backup - Master');
tar -cvzf /var/lib/pgsql/data/potgresMASTER.tar /var/lib/pgsql/data/
psql
select pg_stop_backup();
Now I am trying to setup the secondary server, this is where I am stuck.
1 - I tried to setup rsync to ship these logs across to the remote server, but
I can't get postgres to work with authorized_keys
How you guys are doing this? NFS will not be an option.
WARM server setup
On the Standby Server
I have restored the base backup
Tar -zxvf potgresMASTER.tar under /var/lib/pgsql/data
I have heard of pg_standby but apparently I have to compile it against
postgres/source, not sure how this would help me, if anyone could help me
explaining it to me, it would be really helpful.
Then I need to create a /var/lib/pgsql/data/recovery.conf and add similar lines
restore_command = 'cp /data/pgsql/archives/%f %p'
Do I need to turn this "ON" somewhere, because there seems to be an
inconsistency on information around:
Some people says I have to turn archive_mode = on, some says I have to use
archive_command = on
Do I need to do similar for recovery.conf?
Once I have rsync shipping logs to the remote server, recovery.conf configured,
is that all I need to do to consider it complete and working?
Are there any other aspect that I need to consider?
I would be very thankful too all of you for any helps.
Thank you very much for all your repplies
Best regards
Renato Oliveira
e-mail: renato.olive...@grant.co.uk
Tel: +44 (0)1763 260811
Fax: +44 (0)1763 262410
http://www.grant.co.uk/
Grant Instruments (Cambridge) Ltd
Company registered in England, registration number 658133
Registered office address:
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Shepreth,
CAMBS SG8 6GB
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