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enable_global_dynamic_endpoint parameter, endpoints_listener.ora file [message #449918] Fri, 02 April 2010 04:26 Go to next message
John Watson
Messages: 4862
Registered: January 2010
Location: Global Village
Senior Member
Can anyone point to me towards information on this listener.ora parameter and the endpoints file? There is no reference in the docs (except for a sample listener.ora file in the RAC Installation Guide, no explanation).

Following a clusterware with gPNP installation, the listener.ora file has only IPC addresses, plus this parameter:
LISTENER=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER))))		# line added by Agent
LISTENER_SCAN3=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER_SCAN3))))		# line added by Agent
LISTENER_SCAN2=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER_SCAN2))))		# line added by Agent
LISTENER_SCAN1=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER_SCAN1))))		# line added by Agent
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER_SCAN1=ON		# line added by Agent
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER_SCAN2=ON		# line added by Agent
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER_SCAN3=ON		# line added by Agent
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER=ON		# line added by Agent

The endpoints_listener.ora file specifies the fixed and VIP addresses of the public NIC:
LISTENER_GR7244=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=10.196.182.201)(PORT=1521))(ADDRESS=(PROTOCOL=TCP)(HOST=10.196.180.44)(PORT=1521)(IP=FIRST))))		# line added by Agent

The listener named LISTENER is in fact listening on both its IPC address, and the addresses in the endpoints_listener.ora file:
[grid@gr7244 admin]$ lsnrctl status listener

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 02-APR-2010 04:52:02

Copyright (c) 1991, 2009, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date                01-APR-2010 10:44:19
Uptime                    0 days 18 hr. 7 min. 42 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/11.2.0/grid/network/admin/listener.ora
Listener Log File         /u01/app/grid/diag/tnslsnr/gr7244/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.196.180.44)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.196.182.201)(PORT=1521)))
Services Summary...
Service "+ASM" has 1 instance(s).
  Instance "+ASM1", status READY, has 1 handler(s) for this service...
Service "orcl" has 1 instance(s).
  Instance "orcl1", status READY, has 1 handler(s) for this service...
Service "orclXDB" has 1 instance(s).
  Instance "orcl1", status READY, has 1 handler(s) for this service...
The command completed successfully
[grid@gr7244 admin]$

The scan listener on this node is listening on its IPC address, and its VIP:
[grid@gr7244 admin]$ lsnrctl status listener_scan3

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 02-APR-2010 04:46:15

Copyright (c) 1991, 2009, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER_SCAN3)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER_SCAN3
Version                   TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date                31-MAR-2010 12:10:27
Uptime                    1 days 16 hr. 35 min. 48 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/11.2.0/grid/network/admin/listener.ora
Listener Log File         /u01/app/grid/diag/tnslsnr/gr7244/listener_scan3/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER_SCAN3)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.196.182.200)(PORT=1521)))
Services Summary...
Service "jwha" has 1 instance(s).
  Instance "orcl3", status READY, has 1 handler(s) for this service...
Service "jwserv" has 1 instance(s).
  Instance "orcl3", status READY, has 1 handler(s) for this service...
Service "orcl" has 3 instance(s).
  Instance "orcl1", status READY, has 1 handler(s) for this service...
  Instance "orcl2", status READY, has 1 handler(s) for this service...
  Instance "orcl3", status READY, has 1 handler(s) for this service...
Service "orclXDB" has 3 instance(s).
  Instance "orcl1", status READY, has 1 handler(s) for this service...
  Instance "orcl2", status READY, has 1 handler(s) for this service...
  Instance "orcl3", status READY, has 1 handler(s) for this service...
The command completed successfully
[grid@gr7244 admin]$


I did wonder if this parameter and file could be part of the mechanism whereby a listener discovers the DHCP assigned VIPs on which it has to listen?
Re: enable_global_dynamic_endpoint parameter, endpoints_listener.ora file [message #474622 is a reply to message #449918] Tue, 07 September 2010 11:06 Go to previous message
killersan
Messages: 7
Registered: September 2010
Junior Member
sorry, i wanted to post somewhere else Smile

[Updated on: Tue, 07 September 2010 11:09]

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