DataGuard - why transport is LGWR is not good?

Hello, I have new Dataguard questions.

Recently I set up Active dataguard environmental laboratory in this way:

tnsnames.ora (both)

PRIM_DB = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = ebstestfixdb) (PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = EBSTPF)))

STBY_DB = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = ebscapadb) (PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = EBSTB)))

DB primary

HOST = ebstestfixdb

PORT = 1521

SID = EBSTPF

Watch DB

HOST = ebscapadb

PORT = 1521

SID = EBSTB

(1) in primary DB:

$ sqlplus / as sysdba

SQL > ALTER SYSTEM SET LOG_ARCHIVE_CONFIG = 'DG_CONFIG = (EBSTPF, EBSTB)';

SQL > ALTER SYSTEM SET LOG_ARCHIVE_DEST_2 = 'SERVICE = COMPRESSION stby_db = ENABLE ASYNC VALID_FOR =(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME = EBSTB';

SQL > alter system set log_archive_dest_state_2 = 'reporter ';

SQL > alter system set log_archive_max_processes = 8;

SQL > create pfile='/tmp/initEBSTB.ora' of spfile;

$ cd $ORACLE_HOME/dbs

orapwd file $ = $ORACLE_HOME/dbs/orapw$ ORACLE_SID password = jajah38

SQL > select * from v$ pwfile_users;

(2) copy password file, init.ora and tnsnames.ora on backup server

(3) check the standby settings (keep the original SID main DB):

log_archive_config ='DG_CONFIG = (EBSTPF, EBSTB)

log_archive_max_processes = 8

fal_server = "prim_db."

db_unique_name = "EBSTB".

Comment/remove LOG_ARCHIVE_DEST_2 and log_archive_dest_state_2

(4) primary backup server backups

$ scp ebstestfixdb: / u01/fra/EBSTPF/backup automatic/2014_10_06 / * / u01/fra/EBSTPF/backup automatic/2014_10_06 /.

$ scp ebstestfixdb: / u01/fra/EBSTPF/backupset/2014_10_06 / * / u01/fra/EBSTPF/backupset/2014_10_06 /.

(5) start standby DB and create duplicates

$ export ORACLE_SID = EBSTB

SQL > startup nomount

RMAN $

RMAN > Connect target sys/jajah38@prim_db

RMAN > auxiliary connection.

RMAN > target database double standby nofilenamecheck.

Publish

(1) in primary DB

SQL > alter system set log_archive_dest_state_2 = 'enable '.

Modified system.

(2) standby DB

SQL > alter database open;

Database altered.

SQL > alter database recover managed standby database disconnect;

Database altered.

To control this, I use Nagios Plugin http://labs.consol.de/lang/en/nagios/check_oracle_health/

and this plugin displays a warning:

WARNING - Dataguard managed the recovery status MRP0 process is WAIT_FOR_LOG. Journal of transport is LGWR.

This is the code of this warning:

($self-> {log_transport}) =

$self-> {channel}-> fetchrow_array (q {}

Select decode (count (*), 0, 'ARCH', 'LGWR') as log_transport

v $ managed_standby

where client_process = 'LGWR.

});

... etc...

# OK if log_transport's ARCH, but not if LGWR

$mrp_message. = sprintf "transport journal is % s.", $self-> {log_transport};

If ($self-> {log_transport} eq 'LGWR') {}

... etc...

So, why the newspaper transport LGWR is bad?

And what's wrong in my setup?

Thank you

Fernando

No, none of your options are suitable.

If you have ARCH, then you don't need real-time applies. Option B ARCH transport if you are waiting for newspapers to be switched, archived and shipped. Unless you set archive_lag_target you have no real guarantee speed will be.

You want to:

LGWR

change retrieve managed waiting for basic to disconnect using the file current journal;

Tags: Database

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DataGuard - why transport is LGWR is not good?

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