TAF configuration and testing - 19c RAC

19c TAF configuration and testing

 

1. Add services_taf:

root@rac01 ~]# su - oracle
Last login: Tue Mar  3 18:06:26 CST 2020 on pts/1
[oracle@rac01 ~]$ srvctl add service -d orcl -s server_taf -r "orcl1,orcl2" -P BASIC
 

2. Start server_taf :-

[oracle@rac01 ~]$ srvctl start service -d orcl -s server_taf

 

3. Check the running status of server_taf

[oracle@rac01 ~]$ srvctl config service -d orcl

Service name: server_taf
Server pool: 
Cardinality: 2
Service role: PRIMARY
Management policy: AUTOMATIC
DTP transaction: false
AQ HA notifications: false
Global: false
Commit Outcome: false
Failover type: 
Failover method: 
Failover retries: 
Failover delay: 
Failover restore: NONE
Connection Load Balancing Goal: LONG
Runtime Load Balancing Goal: NONE
TAF policy specification: BASIC
Edition: 
Pluggable database name: 
Hub service: 
Maximum lag time: ANY
SQL Translation Profile: 
Retention: 86400 seconds
Replay Initiation Time: 300 seconds
Drain timeout: 
Stop option: 
Session State Consistency: DYNAMIC
GSM Flags: 0
Service is enabled
Preferred instances: orcl1,orcl2
Available instances: 
CSS critical: no
Service uses Java: false

 

4. Check the service just created

SQL> select name,service_id from dba_services where name ='server_taf';

 NAME            SERVICE_ID
--------------- ----------
server_taf               3

 

5. Check the service configuration

 

SQL> col name format a15 
SQL> col failover_method format a11 heading 'METHOD'
SQL> col failover_type format a10 heading 'TYPE'
SQL> col failover_retries format 9999999 heading 'RETRIES'
SQL> col goal format a10
SQL> col clb_goal format a8
SQL> col AQ_HA_NOTIFICATIONS format a5 heading 'AQNOT'
SQL> select name, failover_method, failover_type, failover_retries,goal, clb_goal,aq_ha_notifications from dba_services where service_id = 3;

 

NAME            METHOD      TYPE        RETRIES GOAL       CLB_GOAL AQNOT

--------------- ----------- ---------- -------- ---------- -------- -----

server_taf                                    0 NONE       LONG     NO

 

 

6. Modify the failover parameter strategy

 

[oracle@rac01 ~]$ srvctl modify service -d orcl -s server_taf -m BASIC -e SELECT -q TRUE -j LONG

[oracle@rac01 ~]$ srvctl config service -d orcl

Service name: server_taf
Server pool: 
Cardinality: 2
Service role: PRIMARY
Management policy: AUTOMATIC
DTP transaction: false
AQ HA notifications: true
Global: false
Commit Outcome: false
Failover type: SELECT
Failover method: BASIC
Failover retries: 
Failover delay: 
Failover restore: NONE
Connection Load Balancing Goal: LONG
Runtime Load Balancing Goal: NONE
TAF policy specification: BASIC
Edition: 
Pluggable database name: 
Hub service: 
Maximum lag time: ANY
SQL Translation Profile: 
Retention: 86400 seconds
Replay Initiation Time: 300 seconds
Drain timeout: 
Stop option: 
Session State Consistency: DYNAMIC
GSM Flags: 0
Service is enabled
Preferred instances: orcl1,orcl2
Available instances: 
CSS critical: no
Service uses Java: false

 

7. Check the service again, we can see that the values ​​are all there

SQL> col name format a15 

SQL> col failover_method format a11 heading 'METHOD'
SQL> col failover_type format a10 heading 'TYPE'

SQL> col failover_retries format 9999999 heading 'RETRIES'
SQL> col goal format a10
SQL> col clb_goal format a8
SQL> col AQ_HA_NOTIFICATIONS format a5 heading 'AQNOT'
SQL> select name, failover_method, failover_type, failover_retries,goal, clb_goal,aq_ha_notifications 
  2  from dba_services where service_id = 3;

 

NAME            METHOD      TYPE        RETRIES GOAL       CLB_GOAL AQNOT
--------------- ----------- ---------- -------- ---------- -------- -----
server_taf      BASIC       SELECT            0 NONE       LONG     YES

 

8. Check whether the service is registered to monitor

[oracle@rac01 ~]$ lsnrctl services

 

LSNRCTL for Linux: Version 19.0.0.0.0 - Production on 19-MAR-2020 16:58:22
 
Copyright (c) 1991, 2019, Oracle.  All rights reserved.
 
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
Services Summary...
……
Service "server_taf" has 1 instance(s).
  Instance "orcl1", status READY, has 1 handler(s) for this service...
    Handler(s):
      "DEDICATED" established:0 refused:0 state:ready
         LOCAL SERVER
Service "orcl" has 1 instance(s).
  Instance "orcl1", status READY, has 1 handler(s) for this service...
    Handler(s):
      "DEDICATED" established:0 refused:0 state:ready
         LOCAL SERVER
         ……
The command completed successfully

 

9. Test the service 

SQL> col host_name format a11;

SQL> select instance_name,host_name from v$instance;

 

INSTANCE_NAME    HOST_NAME

---------------- -----------

orcl2             rac02

 

10. Open a new window to close this instance

SQL> shut abort

ORACLE instance shut down.

 

11. The query can be performed normally, but there will be a temporary lock-up phenomenon

 

SQL> col host_name format a11;

SQL> select instance_name,host_name from v$instance;

 

INSTANCE_NAME    HOST_NAME

---------------- -----------

orcl2             rac02