Which new key architectural element introduced in WebLogic Server l2c should you take
advantage of when designing Disaster Recovery Centers with active – passive mode?
A.
MAN Clusters, because they would allow you to synchronously replicate state in low latency
networks
B.
WAN Clusters, because they would allow you to asynchronously replicate state in nonlow
latency networks.
C.
Transaction Log in the database, because you could avoid synchronizing two replication
technologies (database and file)
D.
Data Guard, because it is the most effective way to replicate a state across locations
E.
GoldenGate, because it is the most effective way to replicate a state across locations
Explanation:
* Oracle GoldenGate
Oracle GoldenGate is Oracle’s strategic product for data distribution and data integration. It is a
highperformance software application that uses log-based bidirectional data replication for realtime capture, transformation, routing, and delivery of database transactions across heterogeneous
systems.
Note:
* Oracle Active Data Guard
Oracle Active Data Guard 11g is an option of Oracle Database Enterprise Edition that extends
basic Data Guard functionality. It allows a physical standby database to be open as read-only
while changes are applied to it from the primary database. This increases performance and return
on investment by offloading ad-hoc queries, Web-based access, reporting, and backups from the
primary database while also providing disaster protection.
* Disaster recovery (DR) procedures ensure rapid recovery or continuation of a technology
infrastructure after a natural or human-induced disaster. Oracle WebLogic Server 12c supports
advanced disaster recovery and business continuity. Organizations can store transaction logs in
an Oracle database instead of a file system, providing a highly available storage mechanism to
improve the speed and reliability of disaster recovery operations. This permits them to utilize
Oracle Active Data Guard or Oracle GoldenGate replication technology to move DR state
information across data centers. Oracle’s enhanced DR architecture enables more effective
recovery scenarios. Support for Oracle Exalogic and Oracle Exadata engineered systems ensures
tremendous scalability for IT operations of any size.
* Oracle WebLogic Server 12c places transaction logs on the database tier to improve the speed,
reliability and availability of disaster recovery operations.
C i think.
Dump state correct answer is ‘E’, however my strong feeling goes with option ‘C’ since first time in 12c Tlog database store concept came which avoided the continuous need of replication of file storage.
Golden Gate technology exist from almost 8 to 10 year.
it is the tlog store answer C:
http://www.pdfiles.com/pdf/files/English/Databases/Oracle_WebLogic_Server_12c.pdf
It seems tlog store was introduced in weblogic 10.3.6.. not 12c, so the answer seem to be E in this case.
http://docs.oracle.com/cd/E23943_01/web.1111/e13852/toc.htm#NOTES136
Yes, TLOG was introduced in 10.3.6 and there aisa question about this:
———–
In WebLogic 10.3.6 and 12c, transaction logs can optionally write to a JDBC store instead of a file store on the file system. Identify the three benefits as a result of this capability.
A. simplified disaster recovery architecture and efforts
B. better performance than writing logs to a file store
C. common storage of transaction logs with application data
D. common replication of transaction logs with application data
E. higher transaction throughput
———–
Question ties to “Configure systems for ease of Disaster Recovery”.
A and B are invalid, because MAN and WAN cross-cluster replication was introduced before 12c.
So, D or E. DataGuard is the old solution, worked and well known before 12c. DataGuard need a wide network channel, because synchronize all database.
GoldenGate can snchronize the only a feww tables. GG can work with any Weblogic version. I did not heared that GG was introduced in WL 12c architecture for using.
But, ithink that E answer can make this question get answered correctly.
I think it is C.
Accelerate Business Continuity with New DR Architecture
——————————————————-
One of the key new features in WebLogic 12c from a performance / DR perspective is the ability store transaction logs in the database rather than on the file system.
Previously, transaction logs could only be stored on the file system. In order to allow for transaction recovery on a different node in a WebLogic cluster due to node failure, the transaction logs had to be stored on redundant, shared storage such as a SAN or NAS.