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Message-ID: <20060711171232.83182.qmail@web36205.mail.mud.yahoo.com>
Date: Tue, 11 Jul 2006 17:12:32 +0000 (GMT)
From: Burbello <burbello3000@yahoo.com.br>
Subject: Restore Database
To: Lista Postgres <pgadmin-support@postgresql.org>
Cc: pgsql-admin@postgresql.org
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: 8bit

I need to test and create a procedure to restore
databases.
I followed the steps based on the site, but I couldn't
finish succesfully.

I did:

 1. Put the database on Backup Mode and copy
datafiles.
    /pg/bin/psql cresoldev -c "SELECT
pg_start_backup('/pg/backup/');"
    tar -cvf /pg/backup/bk_base.tar /pg/data/base/*
    /pg/bin/psql cresoldev -c "SELECT
pg_stop_backup();"

    File .conf: archive_command = 'cp -i %p
/pg/backup/xlog/%f </dev/null'


 2. Created a new table and populated with data, to
simulate the recovery:
    create table test (
     aa integer,
     bb varchar(50)
    );

    insert into test values (1,'aaa');
    ...
    insert into test values (5,'aaa');

    Data inserted successfully!!!


 3. Shutdown on database;

    Last log transactions copied to the directory
archived log;
    cp /pg/data/pg_xlog/* /pg/backup/xlog/


 4. Configuring the recovery.conf file:

    restore_command = 'cp /pg/backup/xlog/%f %p'
    recovery_target_time = '2006-07-06 16:33:52 BRT'


 5. Simulate the lost directories, deleting... :

    rm -r /pg/data/base/*

 6. Recreating the directories exploding the tar file:

    tar -xvf bkp_base... .tar

 7. Starting the database for applying the log
transactions.
    Supposing recove the table "test" located on log
transactions.

    LOG:  database system was shut down at 2006-07-06
16:47:18 BRT
    LOG:  starting archive recovery
    LOG:  restore_command = "cp /pg/backup/xlog/%f %p"
    LOG:  recovery_target_time = 2006-07-06
16:33:52-03
    cp: cannot stat
`/pg/backup/xlog/00000001.history': No such file or
directory
    LOG:  restored log file "000000010000000000000001"
from archive
    LOG:  record with zero length at 0/1122880
    LOG:  invalid primary checkpoint record
    LOG:  restored log file "000000010000000000000001"
from archive
    LOG:  record with zero length at 0/1122844
    LOG:  invalid secondary checkpoint record
    PANIC:  could not locate a valid checkpoint record
    LOG:  startup process (PID 3989) was terminated by
signal 6
    LOG:  aborting startup due to startup process
failure


 8. There was an error and the table was lost.
    What's the procedure that I doing mistakes????????


Thanks for helping me, in advance.

Regards
Alexander


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