É possível renomear um pdb durante o processo de duplicate rman?

agosto 26, 2019 - Administradores - no comments

Imagine um cenário composto por um ambiente Oracle Database 12.2 Single Tenant no qual a temos a necessidade de realizar um processo de duplicate para um novo cdb também Single Tenant no mesmo servidor.

A aplicação conecta no pdb como serviço, desta forma não podemos simplesmente realizar um duplicate pois o novo cdb conterá um pdb com o mesmo nome do pdb de origem, o que irá gerar um conflito nas conexões, uma vez que teremos registrado no listener 1 serviço com 2 instâncias, a de origem e a clonada, conforme exemplo grifado abaixo.

https://everitte.org/npvz8evt98 [oracle@tst-oracle12c:eximio /]$ lsnrctl status LSNRCTL for Linux: Version 12.2.0.1.0 - Production on 23-AUG-2019 14:23:39 Copyright (c) 1991, 2016, Oracle. All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=tst-oracle12c)(PORT=1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 12.2.0.1.0 - Production Start Date 23-AUG-2019 08:56:09 Uptime 0 days 5 hr. 27 min. 30 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /orabin01/app/oracle/product/12.2/dbhome_1/network/admin/listener.ora Listener Log File /orabin01/app/oracle/diag/tnslsnr/tst-oracle12c/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=tst-oracle12c)(PORT=1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=tcps)(HOST=tst-oracle12c)(PORT=5500))(Security=(my_wallet_directory=/orabin01/app/oracle/admin/eximio/xdb_wallet))(Presentation=HTTP)(Session=RAW)) Services Summary... Service "7743c5ddfc2d18a4e0530705a8c0c7b9" has 2 instance(s). Instance "eximio", status READY, has 1 handler(s) for this service... Instance "exitst", status READY, has 1 handler(s) for this service... Service "PLSExtProc" has 1 instance(s). Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service... Service "eximio" has 1 instance(s). Instance "eximio", status READY, has 1 handler(s) for this service... Service "eximioXDB" has 2 instance(s). Instance "eximio", status READY, has 1 handler(s) for this service... Instance "exitst", status READY, has 1 handler(s) for this service... <strong>Service "eximiopdb" has 2 instance(s). Instance "eximio", status READY, has 1 handler(s) for this service... Instance "exitst", status READY, has 1 handler(s) for this service...</strong> Service "exitst" has 2 instance(s). Instance "exitst", status UNKNOWN, has 1 handler(s) for this service... Instance "exitst", status READY, has 1 handler(s) for this service... The command completed successfully

Podemos assim que o processo de duplicate finalizar, renomear o pdb. Porém ate que isso seja feito as conexões ja podem estar caindo na base clonada e aí teremos problema de consistência de dados.

É possível renomear um pdb durante o processo de duplicate rman? A resposta é não, não é possivel renomear um pdb através do duplicate, conforme pode ser confirado através da Doc ID 24359000.1.

%name É possível renomear um pdb durante o processo de duplicate rman?

Para evitar a situação mencionada acima, podemos definir um valor diferente de produção para o parametro db_domain, que por default está nulo.

No exemplo abaixo, foi alterado o parametro db_domain na instancia tst para tst.com antes de iniciar o processo de carga.

https://semnul.com/creative-mathematics/?p=da45ltec SQL> show parameter db_domain; NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ db_domain string tst.com

Após o processo de carga ser realizado, podemos validar que o serviço registrado no lister para a nova base duplicada é eximiopdb.tst.com e não mais eximiopdb. Com isso evitamos qualquer impacto de conexao do ambiente principal.

follow site [oracle@tst-oracle12c:eximio /]$ lsnrctl status LSNRCTL for Linux: Version 12.2.0.1.0 - Production on 23-AUG-2019 14:54:27 Copyright (c) 1991, 2016, Oracle. All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=tst-oracle12c)(PORT=1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 12.2.0.1.0 - Production Start Date 23-AUG-2019 08:56:09 Uptime 0 days 5 hr. 58 min. 18 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /orabin01/app/oracle/product/12.2/dbhome_1/network/admin/listener.ora Listener Log File /orabin01/app/oracle/diag/tnslsnr/tst-oracle12c/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=tst-oracle12c)(PORT=1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=tcps)(HOST=tst-oracle12c)(PORT=5500))(Security=(my_wallet_directory=/orabin01/app/oracle/admin/eximio/xdb_wallet))(Presentation=HTTP)(Session=RAW)) Services Summary... Service "7743c5ddfc2d18a4e0530705a8c0c7b9" has 1 instance(s). Instance "eximio", status READY, has 1 handler(s) for this service... Service "7743c5ddfc2d18a4e0530705a8c0c7b9.tst.com" has 1 instance(s). Instance "exitst", status READY, has 1 handler(s) for this service... Service "EXITST.tst.com" has 1 instance(s). Instance "exitst", status READY, has 1 handler(s) for this service... Service "PLSExtProc" has 1 instance(s). Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service... Service "eximio" has 1 instance(s). Instance "eximio", status READY, has 1 handler(s) for this service... Service "eximioXDB" has 1 instance(s). Instance "eximio", status READY, has 1 handler(s) for this service... Service "eximioXDB.tst.com" has 1 instance(s). Instance "exitst", status READY, has 1 handler(s) for this service... <strong>Service "eximiopdb" has 1 instance(s). Instance "eximio", status READY, has 1 handler(s) for this service... Service "eximiopdb.tst.com" has 1 instance(s). Instance "exitst", status READY, has 1 handler(s) for this service... Service "exitst" has 1 instance(s).</strong> Instance "exitst", status UNKNOWN, has 1 handler(s) for this service... The command completed successfully [oracle@tst-oracle12c:eximio /]$

Fonte:http://www.lamimdba.com.br/2019/08/e-possivel-renomear-um-pdb-durante-o.html

Autor: Jhonata Lamim

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