R12.2 DBA Interview qusetions
Question 1: What is Online Patching?
Answer:
Online patching is a new patching mechanism that is available with R12.2 that allows the application of patches while the system is up and running, and the users are working as normal.
Answer Online patching is used with Oracle E-Business Suite 12.2 and higher.
Question 3: What types of patch are applied online?
Answer: All Oracle E-Business Suite Release 12.2 patches are applied online. This includes one-off patches, patch rollups, consolidated updates and security patches.
Answer: The Online Patching cycle is a sequence of inter-related steps (phases) used to apply patches to an Oracle E-Business Suite system.
Answer: The AD Online Patching (adop) command-line utility is used to manage the Online Patching cycle.adop invokes adpatch is the background only
Answer: There is a short period of downtime when the application tier services are shut down and restarted. The database remains open all the time.
Answer :No. All patches for Release 12.2 will be online patches. The traditional, pre-12.2 method of applying patches will not work.There are option like downtime and hotpatch which works more like traditional way but they are used for patches directed by Oracle
Answer :This infrastructure includes database objects edition and patch/run file system components.
Answer Yes. Online patching depends on the Edition Based Redefinition (EBR) feature that was introduced in the Oracle 11gR2 Database. Most notably, EBR allows editioning of code objects in the database. To do this, it provides new object types such as editions, editioning views, and cross-edition triggers, all of which are part of the Online Patching infrastructure.
Answer: The Online Patching cycle consists of the following phases:
1.Prepare a virtual copy (patch edition) of the running application (run edition).
2.Apply patches to the patch edition of the application.
3.Finalize the system in readiness for the cutover phase.
4.Cutover to the patch edition and make it the new run edition.
5.Cleanup obsolete definitions or data to recover space.
Answer The cutover phase requires a short period of downtime (typically a few minutes) for transition tasks such as a restart of the application tier services.
Answer: No. In fact, the database needs to be up and running during each phase of the Online Patching cycle. Suite database.
Answer:During Release 12.2 installation, Rapid Install will lay down two copies of the application tier file system. One of the copies will be labeled as the run file system, and the other as the patch file system. Subsequently, when a patch is applied, adop will:
1.Synchronize the contents of the run file system to the patch file system. This happens during the prepare phase.
2.Perform patching actions on the patch file system. This happens during the apply phase.
3.Finally, during the cutover phase, the adop utility restarts the application tier services. The patch file system is then promoted to be the new run file system, and the old run file system becomes the patch file system for the next patching cycle.
Answer: During the apply phase of an Online Patching cycle, you apply Oracle Fusion Middle-ware patches to the Oracle homes of the patch edition file system. Then, after the cut over phase is complete, you synchronize the file systems by performing an fs_clone operation. (Also see My Oracle Support Knowledge Document 1355068.1, as listed in Appendix A.)
Answer As a specialized component of the Online Patching infrastructure, the patch edition is not supported for use as a test environment. You should continue to employ a separate, dedicated test environment.
Answer:Yes. Online patching can be used alongside Active Dataguard and Flashback. Infact we can use flashback to rollback the changes after the final cutover
Question 17. What are the key differences between the DBA_OBJECTS, DBA_OBJECTS_AE, and AD_OBJECTS tables?
Answer DBA_OBJECTS shows object information for the current edition, but the STATUS column in this view may show the object as VALID even if the object actually needs to be compiled before use.
DBA_OBJECTS_AE is similar to DBA_OBJECTS, but shows object information across all editions. This has the drawback of showing objects in old editions that are no longer accessible to the application.
AD_OBJECTS is the Oracle E-Business Suite workaround to the unreliable STATUS column in DBA_OBJECTS. AD_OBJECTS shows the correct status for each object visible in the current edition. It also shows whether the object is “actual” (a real object) in the current edition, or a “stub” object (the object definition was inherited from a previous edition). You can query AD_OBJECTS to locate objects that need to be recompiled before use:
SQL>select owner, object_name, object_type
from ad_objects
where status = ‘INVALID’
order by 1,2,3
/
SQL>sqlplus apps/apps @$AD_TOP/sql/ADZDSHOWINVALID
Answer: Yes. Online patching requires an additional set of network ports for the Oracle WebLogic Server managed servers on the second file system. During the cutover phase, the managed servers run simultaneously on the patch file system and run file system for a brief period, in a rolling transition process.
Answer Yes. Up to cutover, you can run the abort phase to undo the changes made so far in the patching cycle. It is not possible to back out patches once cutover is complete.
Answer: Yes. A shared APPL_TOP configuration is supported and recommended for multi-node application tier implementations in Release 12.2.
Answer The adop Online Patching tool uses remote APIs and ssh login to execute patching operations on remote nodes in a multi-node environment. The node that launches adop becomes the ‘master’ node, and the remote nodes are referred to as ‘slaves’.
Answer: You can run the adop -status command. This will display information that includes phases completed and the time taken. If you want additional details of operations performed, you can run the adop -status -detail command.
Answer: To optimize the process of upgrading to E-Business Suite Release 12.2, the AD Delta 5 Release Update Pack introduced downtime mode, which is used as follows:
When applying Oracle E-Business Suite patches in this mode, adop will first confirm that the application tier services are down, and will then proceed to apply the patch to the run edition of the Oracle E-Business Suite database and file system.
Downtime mode is supported for:
-All patching (including post-upgrade patching) that forms part of the Release 12.2 upgrade process and is completed before the system is scaled up, the application tier services are started, and users log in to the upgraded system.
-Single-node development or test environments, where production support and high availability are not required.
Top Oracle Books
Online patching is a new patching mechanism that is available with R12.2 that allows the application of patches while the system is up and running, and the users are working as normal.
Answer Online patching is used with Oracle E-Business Suite 12.2 and higher.
Question 3: What types of patch are applied online?
Answer: All Oracle E-Business Suite Release 12.2 patches are applied online. This includes one-off patches, patch rollups, consolidated updates and security patches.
Answer: The Online Patching cycle is a sequence of inter-related steps (phases) used to apply patches to an Oracle E-Business Suite system.
Answer: The AD Online Patching (adop) command-line utility is used to manage the Online Patching cycle.adop invokes adpatch is the background only
Answer: There is a short period of downtime when the application tier services are shut down and restarted. The database remains open all the time.
Answer :No. All patches for Release 12.2 will be online patches. The traditional, pre-12.2 method of applying patches will not work.There are option like downtime and hotpatch which works more like traditional way but they are used for patches directed by Oracle
Answer :This infrastructure includes database objects edition and patch/run file system components.
Answer Yes. Online patching depends on the Edition Based Redefinition (EBR) feature that was introduced in the Oracle 11gR2 Database. Most notably, EBR allows editioning of code objects in the database. To do this, it provides new object types such as editions, editioning views, and cross-edition triggers, all of which are part of the Online Patching infrastructure.
Answer: The Online Patching cycle consists of the following phases:
1.Prepare a virtual copy (patch edition) of the running application (run edition).
2.Apply patches to the patch edition of the application.
3.Finalize the system in readiness for the cutover phase.
4.Cutover to the patch edition and make it the new run edition.
5.Cleanup obsolete definitions or data to recover space.
Answer The cutover phase requires a short period of downtime (typically a few minutes) for transition tasks such as a restart of the application tier services.
Answer: No. In fact, the database needs to be up and running during each phase of the Online Patching cycle. Suite database.
Answer:During Release 12.2 installation, Rapid Install will lay down two copies of the application tier file system. One of the copies will be labeled as the run file system, and the other as the patch file system. Subsequently, when a patch is applied, adop will:
1.Synchronize the contents of the run file system to the patch file system. This happens during the prepare phase.
2.Perform patching actions on the patch file system. This happens during the apply phase.
3.Finally, during the cutover phase, the adop utility restarts the application tier services. The patch file system is then promoted to be the new run file system, and the old run file system becomes the patch file system for the next patching cycle.
Answer: During the apply phase of an Online Patching cycle, you apply Oracle Fusion Middle-ware patches to the Oracle homes of the patch edition file system. Then, after the cut over phase is complete, you synchronize the file systems by performing an fs_clone operation. (Also see My Oracle Support Knowledge Document 1355068.1, as listed in Appendix A.)
Answer As a specialized component of the Online Patching infrastructure, the patch edition is not supported for use as a test environment. You should continue to employ a separate, dedicated test environment.
Answer:Yes. Online patching can be used alongside Active Dataguard and Flashback. Infact we can use flashback to rollback the changes after the final cutover
Question 17. What are the key differences between the DBA_OBJECTS, DBA_OBJECTS_AE, and AD_OBJECTS tables?
Answer DBA_OBJECTS shows object information for the current edition, but the STATUS column in this view may show the object as VALID even if the object actually needs to be compiled before use.
DBA_OBJECTS_AE is similar to DBA_OBJECTS, but shows object information across all editions. This has the drawback of showing objects in old editions that are no longer accessible to the application.
AD_OBJECTS is the Oracle E-Business Suite workaround to the unreliable STATUS column in DBA_OBJECTS. AD_OBJECTS shows the correct status for each object visible in the current edition. It also shows whether the object is “actual” (a real object) in the current edition, or a “stub” object (the object definition was inherited from a previous edition). You can query AD_OBJECTS to locate objects that need to be recompiled before use:
SQL>select owner, object_name, object_type
from ad_objects
where status = ‘INVALID’
order by 1,2,3
/
SQL>sqlplus apps/apps @$AD_TOP/sql/ADZDSHOWINVALID
Answer: Yes. Online patching requires an additional set of network ports for the Oracle WebLogic Server managed servers on the second file system. During the cutover phase, the managed servers run simultaneously on the patch file system and run file system for a brief period, in a rolling transition process.
Answer Yes. Up to cutover, you can run the abort phase to undo the changes made so far in the patching cycle. It is not possible to back out patches once cutover is complete.
Answer: Yes. A shared APPL_TOP configuration is supported and recommended for multi-node application tier implementations in Release 12.2.
Answer The adop Online Patching tool uses remote APIs and ssh login to execute patching operations on remote nodes in a multi-node environment. The node that launches adop becomes the ‘master’ node, and the remote nodes are referred to as ‘slaves’.
Answer: You can run the adop -status command. This will display information that includes phases completed and the time taken. If you want additional details of operations performed, you can run the adop -status -detail command.
Answer: To optimize the process of upgrading to E-Business Suite Release 12.2, the AD Delta 5 Release Update Pack introduced downtime mode, which is used as follows:
When applying Oracle E-Business Suite patches in this mode, adop will first confirm that the application tier services are down, and will then proceed to apply the patch to the run edition of the Oracle E-Business Suite database and file system.
Downtime mode is supported for:
-All patching (including post-upgrade patching) that forms part of the Release 12.2 upgrade process and is completed before the system is scaled up, the application tier services are started, and users log in to the upgraded system.
-Single-node development or test environments, where production support and high availability are not required.
Top Oracle Books
-You cannot validate successful patch application before cutover to the updated code takes place.
-There is no capability to abort a failed patch and return to the existing run edition.
-Release 12.2 patches are not normally tested in downtime mode.
-Use of downtime mode in a multi-node application tier environment is not tested or supported.
Question 24. What can I do to reduce the time required for cutover?
Answer: It is important to distinguish between the time needed for the whole cutover phase, and the downtime period within the phase. The actual downtime (during which users cannot log in) is significantly shorter than the whole phase. To help reduce the overall time taken by cutover, you can do three things:
-Run the finalize phase explicitly, to obviate the need for cut over to do so.
-Shut down the concurrent managers before running cut over, to avoid having to wait for concurrent requests to complete. Alternatively, ensure no long-running concurrent jobs are submitted while a patching cycle is in progress.
-Ensure you are using the maximum number of parallel workers your system will support.
Answer The command adop phase=fs_clone is a special command that is used to copy the run file system to the patch file system. Also see previous question.
Answer: Yes, these maintenance tasks will be performed online. The relevant operations will be targeted to the patch file system, and should be performed during a patching cycle. They will not have any impact on the run file system.
Answer Yes. Data fix patches (used to fix transactional data) require special handling. The patch readme will give full instructions.
Answer You should apply your customizations to the patch edition during the apply phase of the Online Patching cycle. Because this happens prior to the cutover phase, your changes will be propagated to the new run edition (along with all the fixes in the patches applied during the patching cycle).
Answer The coding standards in the Oracle E-Business Suite Developer’s Guide state that the first step to any custom application development is to register the custom Oracle schema with the Oracle E-Business Suite applications. The Online Patching enablement patch enables editioning on all the schemas registered with the application. If you follow this process, your schema will be edition-enabled automatically.
Answer Yes. There are some special considerations for creating custom patches that are compliant with Online Patching. Refer to the Patching Standards section of Oracle E-Business Suite Developer’s Guide.
Answer Any third-party schema, either from third-party products or custom code, must access Oracle E-Business Suite tables via the synonyms in the APPS schema. Direct access to Oracle E-Business Suite tables may produce incorrect results.
Answer: R12.2 uses weblogic while R12.1 uses OC4J. Apart from that we have online patching feature in r12.2 using edition and patch/run file system
Answer: apps password is same as R12.1 with the exception of changing that in weblogic console also.
Answer: It is stored in the third filesystem which is non edition filesystem
Answer: Source the env using patch option
/u71/R122/EBSapps.env patch
Answer How to find Weblogic Version
Answer
Apache Logs
$IAS_ORACLE_HOME/instances/*/diagnostics/logs/OPMN/opmn/*
$EBS_DOMAIN_HOME/servers/forms*/logs/*
$EBS_DOMAIN_HOME/servers/AdminServer/logs/*
$EBS_DOMAIN_HOME/sysman/log/*
Answer
| Component | Command |
| Node Manager | $adnodemgrctl.sh start Enter Weblogic Admin Password: |
| Weblogic Admin Server | $adadminsrvctl.sh start Enter Weblogic Admin Password: |
| Application Listener | $adalnctl.sh start |
| Oracle Process Manager | $adopmnctl.sh start |
| Apache Services | $adapcctl.sh start |
| Managed Server for OACORE Services | $admanagedsrvctl.sh start oacore_server1 Enter Weblogic Admin Password: |
| Managed Server for FormsServices | $admanagedsrvctl.sh start forms_server1 Enter Weblogic Admin Password: |
| Managed Server for Fusion MiddleWare Services | $admanagedsrvctl.sh start oafm_server1 Enter Weblogic Admin Password: |
| Managed Server for Forms web Services | $admanagedsrvctl.sh start forms-c4ws_server1 Enter Weblogic Admin Password: |
| Concurrent Manager Service | $adcmctl.sh start apps/apps |
| Fullfillment Serer Services | $jtffmctl.sh start |
| Component | Command |
| Fullfillment Serer Services | $jtffmctl.sh stop |
| Concurrent Manager Service | $adcmctl.sh stop apps/apps |
| Managed Server for Forms web Services | $admanagedsrvctl.sh stop forms-c4ws_server1 Enter Weblogic Admin Password: |
| Managed Server for Fusion MiddleWare Services | $admanagedsrvctl.sh stop oafm_server1 Enter Weblogic Admin Password: |
| Managed Server for FormsServices | $admanagedsrvctl.sh stop forms_server1 Enter Weblogic Admin Password: |
| Managed Server for OACORE Services | $admanagedsrvctl.sh stop oacore_server1 Enter Weblogic Admin Password: |
| Apache Services | $adapcctl.sh stop |
| Oracle Process Manager | $adopmnctl.sh stop |
| Application Listener | $adadlctl stop |
| Weblogic Admin Server | $adadminsrvctl.sh stop Enter Weblogic Admin Password: |
| Node Manager | $adnodemgrctl.sh stop Enter Weblogic Admin Password: |
Answer It is not required in R12.2 cloning as adpreclone copies the Oracle fusion middle in compressed format on the application tier
Question 2: Which Oracle E-Business Suite releases Online Patching feature is available?
Question 4:What is the Online Patching cycle?
Question 5:What tool is used to apply online patches?
Question 6: Is there any downtime in Online Patching?
Question 7 Once I upgrade to Release 12.2, can I still apply patches in the traditional way?
Question 8:What is the Online Patching infrastructure?
Question 9. Does Online Patching require the 11gR2 Oracle Database Edition Based Redefinition (EBR) feature?
Question 10. What are the phases that make up the Online Patching cycle?
Question 11.What downtime is required during an Online Patching cycle? or as the name spells online,there is not downtime in the whole process
Question 12. Is any downtime required for the database tier?
Question 13.How does Online Patching work on the application tier?
Note that a third file system, the non-editioned file system (fs_ne), is created to store files containing data that is needed across all file systems,such as log files.
Question 14.How do I apply Oracle Fusion Middle-ware patches in Oracle E-Business Suite Release 12.2?
Question 15. Can I use the patch edition for testing and development purposes?
Question 16.Can Online Patching be used with database technologies such as Active Dataguard and Flashback?
The same logic can be applied by running the script:
Question 18.Does Online Patching increase the network port requirements on an Oracle E-Business Suite instance?
Question 19.Is it possible to abort an Online Patching session?
Question 20.Is the shared APPL_TOP configuration supported with Online Patching?
Question 21.How does adop work in a multi-node environment?
Question 22.How do I determine the status of my Online Patching session?
Question 23.What is downtime mode and when can it be used?
$ adop phase=apply patches=<patch_number> apply_mode=downtime
Downtime mode does not use an online patching cycle. The process of applying a patch in downtime mode completes more quickly than in online mode, but at the cost of increased system downtime.
Downtime mode allows the 12.2 upgrade process to be completed as quickly as possible. Once the upgrade is complete and users are online, all subsequent patching on a production system should use online mode, not downtime mode, unless the patch readme states otherwise.
Several restrictions apply to the use of downtime mode:
Question 25.What is fs_clone and how is it used?
Question 26.Will AutoConfig and adadmin maintenance tasks such as adrelink,forms compilation,report compilation be performed online?
Question 27.Does Online Patching change the way data fix patches are applied to Oracle E-Business Suite 12.2?
Question 28 How do I apply or patch my customizations in Oracle E-Business Suite Release 12.2?
Question 29. If custom code is installed on a separate database schema, do I have to edition-enable my custom database schema?
Question 30. Are there any special considerations for creating custom patches that are compliant with Online Patching?
Question 31: How is a non Oracle E-Business Suite database schema able to access the Oracle E-Business Suite tables?
Question 32: What are the main technological difference between R12.2 and R12.1
Question 33: How to change the apps password in R12.2?
Question 34: where are the log files stored for adop?
Question 35. how do you connect to the patch edition?
Question 36: How to determine the weblogic version in R12.2
Question 37. How to increase the manage node in R12.2?
Question 38. Where are the log file located in R12.2 Apache and Weblogic
Answer
$IAS_ORACLE_HOME/instances/*/diagnostics/logs/OHS/EBS_web_*/*log
OPMN Log
Weblogic Logs
$IAS_ORACLE_HOME/../wlserver_10.3/common/nodemanager $EBS_DOMAIN_HOME/servers/oa*/logs/*
Question 39. How to stop and start the services in R12.2
When we want to stop all application services using script adstpall.sh , we provide apps password in R12.1.3.But in R12.2 it will ask weblogic admin password in addition to bring down to all services .
We need to provide Weblogic admin password
Stop
No comments:
Post a Comment