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1Z0-058 - Oracle Real Application Clusters 11g(R) Release 2 and Grid Infrastructure Administration - Dump Information
Vendor | : | Oracle |
Exam Code | : | 1Z0-058 |
Exam Name | : | Oracle Real Application Clusters 11g(R) Release 2 and Grid Infrastructure Administration |
Questions and Answers | : | 139 Q & A |
Updated On | : | November 3, 2017 |
PDF Download Mirror | : | 1Z0-058 Brain Dump |
Get Full Version | : | Pass4sure 1Z0-058 Full Version |
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Explanation:
Creating
an Oracle RAC Database with DBCA Oracle ships templates for the
following two workload types: General purpose or transaction processing
Data warehouse For more complex environments, you can select the Custom
Database option. This option does not use templates and results in a
more extensive interview, which means that it takes longer to create
your database. Oracle® Real Application Clusters Installation Guide 11g
Release 2 (11.2) for Linux and UNIX
QUESTION: 131
Examine the following output: [oracIe@gr5153 ~]$ sudo crsctl config crs
CRS-4622:
Oracle High Availability Services autostart is enabled. [oracIe@gr5153
~]$ srvctl config database -d RACDB -a Database unique name: RACDB
Database name: RACDB
Oracle home : /u01/app/oracle/product/l11.2.0/dbhome_1 Oracle user: oracle
Spfile: +DATA/ RACDB /spfileRACDB.ora Domain:
Start options: open
Stop options: immediate
Database role: PRIMARY Management policy: AUTOMATIC Server pools: POOL1
Database instances:
Disk Groups: DATA, FRA Services:
Database is enabled Database is policy managed
Oracle
Clusterware is started automatically after the system boot.
Which two statements are true regarding the attributes of RACDB?
- Oracle Clusterware automatically starts RACDB.
- You must manually start RACDB.
- Database resource is managed by crsd for high availability and may be automatically restarted in place if it fails.
- Database resource Is not managed by crsd for high availability and needs to be restarted manually if it fails.
Answer: A, C
Explanation:
Switch
Between the Automatic and Manual Policies By default, Oracle
Clusterware is configured to start the VIP, listener, instance, ASM,
database services, and other resources during system boot. It is
possible to modify some resources to have their
profile
parameter AUTO_START set to the value 2. This means that after node
reboot, orwhen Oracle Clusterware is started, resources with
AUTO_START=2 need to be started manually via srvctl. This is designed to
assist in troubleshooting and system maintenance. When changing
resource profiles through srvctl, the command tool automatically
modifies the profile attributes of other dependent resources given the
current prebuilt dependencies. The command to accomplish this is: srvctl
modify database -d <dbname> -y AUTOMATIC|MANUAL D60488GC11 Oracle
11g: RAC and Grid Infrastructure Administration Accelerated 15–3 3.4.1
Benefits of Using Oracle Clusterware Oracle Clusterware provides the
following benefits: Tolerates and quickly recovers from computer and
instance failures. Simplifies management and support by means of using
Oracle Clusterware together with Oracle Database. By using fewer vendors
and an all Oracle stack you gain better integration compared to using
third-party clusterware. Performs rolling upgrades for system and
hardware changes. For example, you can apply Oracle Clusterware
upgrades, patch sets, and interim patches in a rolling fashion, as
follows: Upgrade Oracle Clusterware from Oracle Database 10g to Oracle
Database 11g Upgrade Oracle Clusterware from Oracle Database release
11.1 to release 11.2 Patch Oracle Clusterware from Oracle Database
11.1.0.6 to 11.1.0.7 Patch Oracle Clusterware from Oracle Database
10.2.0.2 Bundle 1 to Oracle Database 10.2.0.2 Bundle 2 Automatically
restarts failed Oracle processes. Automatically manages the virtual IP
(VIP) address so when a node fails then the node's VIP address fails
over to another node on which the VIP address can accept connections.
Automatically restarts resources from failed nodes on surviving nodes.
Controls Oracle processes as follows: For Oracle RAC databases, Oracle
Clusterware controls all Oracle processes by default. For Oracle
single-instance databases, Oracle Clusterware allows you to configure
the Oracle processes into a resource group that is under the control of
Oracle Clusterware. Provides an application programming interface (API)
for Oracle and non-Oracle applications that enables you to control other
Oracle processes with Oracle Clusterware, such as restart or react to
failures and certain rules. Manages node membership and prevents
split-brain syndrome in which two or more instances attempt to control
the database. Provides the ability to perform rolling release upgrades
of Oracle Clusterware, with no downtime for applications. Oracle®
Database High Availability Overview 11g Release 2 (11.2)
QUESTION: 132
Which four statements are true about services and connection load balancing?
- Services provide the ability to balance client connections across the instances in an Oracle RAC configuration.
- There are two types of load balancing that you can implement; load balancing decisions can be made by the client and by the listener.
- In a RAC database environment, you should select only one load balancing method.
- With server-side load balancing, the listener directs a connection request to the best instance that is currently providing the service based on the load-balancing
options selected by the DBA. E. Client-side load balancing balances the connection requests across the listeners.
Answer: A, B, D, E
Explanation:
Services and Connection Load Balancing
The two load balancing methods that you can implement are:
- Client-side load balancing: Balances the connection requests across the listeners
- Server-side load balancing: The listener directs a connection request to the best instance currently providing the service by using the load balancing advisory (LBA). FAN, Fast Connection Failover, and LBA depend on a connection load balancing configuration that includes setting the connection load balancing goal for the service.The load balancing goal for the service can be either:
- LONG: For applications having long-lived connections. This is typical for connection pools andSQL*Forms sessions.
- SHORT: For applications that have short-lived connection
Oracle
Net Services provides the ability to balance client connections across
the instances in an Oracle RAC configuration. You can implement two
types of load balancing: client-side and server- side.
Client-side
load balancing balances the connection requests across the listeners.
With server-side load balancing, the listener directs a connection
request to the best instance currently providing the service by using
the load balancing advisory.
In a RAC database, client connections should use both types of connection load balancing. D60488GC11
Oracle 11g: RAC and Grid Infrastructure Administration Accelerated 15 – 12
QUESTION: 133
You
are managing a three-instance policy-managed RAC database PROD. You
created a service called GL for the PROD database by using the following
command: [oracIe@gr7597~]$ srvctl add service -d PROD -s GL -g SP1 -c
singleton -y manual
Examine the following output:
[oracIe@gr7597~]$ srvctl config database -d PROD -a Database unique name: PROD
Database name: PROD
Oracle home: /u01/app/oracle/product/11.2.0/dbhome_1 Oracle user: oracle
Spfile: +DATA/PROD/spfileRACDB.ora Domain:
Start options: open
Stop options: immediate
Database role: PRIMARY Management policy: AUTOMATIC Server pools: SP1
Database instances:
Disk Groups: DATA, FRA Services:
Database is enabled Database is policy managed
[oracIe@gr7597~]$ crsctl stat res ora.PROD.db NAME=ora.PROD.db TYPE=cluster_resource TARGET=ONLINE
STATE=ONLINE on gr7597 ONLINE on gr7602 ONLINE on gr7633
[oracIe@gr7597~]$ crsctl stat serverpool ora.SP1 NAME=ora.SP1
ACTIVE_SERVERS=gr7597 gr7602 gr7633
[oracle®gr7597-]$ crsctl stat res ora.prod.gl.svc
NAME=ora.prod.gl.svc TYFE=ora.service.type TARGET=ONLINE STATE=ONLINE on gr7597
Which three steps are required to enable ODP.NET clients that connect to the GL service to receive FAN High Availability Events?
- Enable Advanced Queuing notifications by using SRVCTL as shown in the following command: $ srvctl modify service -d prod -s gl -q TRUE -j LONG
- Execute the following statement for the users that will be connecting by way of the .Net Application, where user_name is the user name: EXECUTE DBMS_AQADM.GRANT_QUEUE_PRIVILEGE( 'DEQUEUE', 'SYS.SYS$SERVICE_METRICS', user_name ) ;
- Enable Transparent Application Failover (TAF), either on the client or for the service.
- Enable Fast Connection Failover for ODP.NET connection pools by subscribing to FAN High Availability events. Do this by setting the HA events connection string attribute to true at connection time.
- Link client applications with the client thread or operating system library.
Answer: A, B, D
Explanation:
Enabling
ODP.NET Clients to Receive FAN High Availability Events Perform the
following steps to enable FAN for ODP.NET clients: Enable Advanced
Queuing notifications for a service by using SRVCTL as shown in the
following example: srvctl modify service -d crm -s odpnet.example.com -q
TRUE Grant permissions on the internal event queue table by executing
the following command for the users that will be connecting by way of
the ODP.NET application, where user_name is the database user name:
EXECUTEDBMS_AQADM.GRANT_QUEUE_PRIVILEGE('DEQUEUE','SYS.S
YS$SERVICE_MET
RICS', user_name); Enable Fast Connection Failover for ODP.NET
connection pools by subscribing to FAN high availability events. To
enable FCF, include "HA Events=true" and "pooling=true" (the default
value) in the
connection
string, as shown in the following example where user_name is the name
of the database user and password is the password for that user:
con.ConnectionString =
"User Id=user_name;Password=password;Data Source=odpnet;" +
"Min Pool Size=10;Connection Lifetime=120;Connection Timeout=60;" + "HA Events=true;Incr Pool Size=5;Decr Pool Size=2";
Oracle® Real Application Clusters Administration and Deployment Guide 11g Release 2 (11.2)
QUESTION: 134
Examine the Exhibit.**Missing Exhibit** Which three statements are correct?
- Global Cache Block Access Latency indicates how many block transfers incurred a delay (busy) or an unexpected longer delay (congested).
- Global Cache Block Access Latency indicates how many block transfers received blocks cached by other instances as well as blocks read from disk.
- Global Cache Block Transfer Rate shows the total aggregated number of blocks received by all instances in the cluster over the interconnect.
- Global Cache Block Transfer Rate is essentially a profile of how much work is performed in the local buffer cache, rather than the portion of remote references and physical reads, which both have higher latencies.
- Global Cache Block Transfers and Physical Reads shows the percentage of read operations that retrieved blocks from disk, and the buffer cache of other instances using Cache Fusion.
- Global Cache Block Transfers and Physical Reads shows the aggregated number of data blocks received by all instances in the cluster over the interconnect.
Answer: A, C, E
Explanation:
Global
Cache Block Access Latency The global cache access latency represents
the end-to-end elapsed time for a block request. The request is timed
from when the request is initiated until it completes. Cache transfer
indicates how many current and CR blocks per block class were received
from remote instances, including how many transfers incurred a delay
(busy) or an unexpected longer delay (congested). If accessing a
database block of any class does not locate a buffered copy in the local
cache, a global cache operation is initiated. Before reading a block
from disk, an attempt is made to find the block in the buffer cache of
another instance. If the block is present in another instance, a version
of the block may be shipped. Two different kinds of blocks are
distinguished: current and consistent read blocks. The average block
receive time represents the end-to-end elapsed time or latency for a
block request. Global Cache Block Transfer Rate The global cache block
transfer rate shows the total aggregated number of data blocks received
by all instances in the
cluster
by way of an interconnect. If a logical read fails to find a copy ofthe
buffer in the local cache, it attempts to find the buffer in the
database cache of a remote instance. If the block is present in another
database, it is sent to the current instance. Global Cache Block
Transfers and Physical Reads The chart represents the percentage of
logical reads that read data from the buffer cache of other instances
via Direct Memory Access and from disk. It is essentially a profile of
how much work is performed in the local buffer cache, rather than the
portion of non-local references that incur some latency overhead. Active
Sessions for Cluster Wait Class The chart represents the active
sessions for the cluster wait class. You can view the top modules and
top SQL for a time period by selecting the time period in the active
sessions chart. Oracle Enterprise Manager Online Help
QUESTION: 135
orcl1,
orcl2, and orcl3 are tnsnames that connect to predefined instances of a
three- instance RAC database which uses ASM for shared storage. The
database is in archivelog mode. Examine the Exhibit for the tnsnames.ora
entries for orcl1, orcl2, and orcl3.
You
plan to execute the following RMAN commands to back up the database:
RUN{ ALLOCATE CHANNEL CH1 DEVICE TYPE DISK CONNECT
'user1/pwd1@orcl1'; ALLOCATE CHANNEL CH2 DEVICE TYPE DISK
CONNECT 'user2/pwd2@orcl2'; ALLOCATE CHANNEL CH3 DEVICE TYPE DISK
CONNECT 'user3/pwd3@orcl3'; BACKUP DATABASE PLUS
ARCHIVELOG; }
What should be the database mode on each of the three instances for this backup to succeed?
- The database can be either mounted or open on all three instances.
- The database must be open on all three instances.
- The database must be open on any one instance and mounted on the other two instances.
- The database must be mounted on any one of the instances and the other instances will be mounted automatically.
Answer: A
Explanation: connectStringSpec Purpose
Use
the connectStringSpec subclause to specify the user name, password, and
net service name for connecting to a target, recovery catalog, or
auxiliary database. The connection is necessary to authenticate the user
and identify the database.
Prerequisites
You
must have SYSDBA privileges to CONNECT to a target or auxiliary
database. Do not connect to the recovery catalog database as user SYS.
Usage Notes
RMAN
connections to a database are specified and authenticated in the same
way as SQL*Plus connections to a database. The only difference is that
RMAN connections to a target or auxiliary database require the SYSDBA p
rivilege. The AS SYSDBA keywords are implied and cannot be explicitly
specified. See Oracle
Database Administrator's Guide to learn about database connection options when using
SQL*Plus.
Oracle® Database Backup and Recovery Reference 11g Release 2 (11.2)
QUESTION: 136
The Global Cache Block Access Latency chart shows high elapsed times. What are two possible causes for this?
- badly written SQL statements
- storage network bottlenecks
- a large number of requested blocks not cached in any instance
- slow or faulty interconnect
Answer: A, D
Explanation:
About Global Cache Block Access Latency Chart
If
the Global Cache Block Access Latency chart shows high latencies (high
elapsed times), then this can be caused by any of the following:
A high number of requests caused by SQL statements that are not tuned.
A
large number of processes in the queue waiting for the CPU, or
scheduling delays. Slow, busy, or faulty interconnects. In these cases,
check your network connection for dropped packets, retransmittals, or
cyclic redundancy check (CRC) errors. Oracle® Database 2 Day + Real
Application Clusters Guide
11g Release 2 (11.2)
QUESTION: 137
Which
three steps must be completed to configure Fast Connection Failover for
the CRM service with an Oracle Call Interface client?
- Ensure that the CRM service has Advanced Queuing notifications enabled by setting the services values of AQ_HA_NOTIFICATIONS to TRUE. For example: $ srvctl modify service -d crm -s gl.us.oracle. com \ -q TRUE -P BASIC -e SELECT - z 180 -w 5 -j LONG
- Enable OCI_EVEINTS on the client at environment creation time by using the OCIEnvCreate(…) function.
- Use Oracle Call Interface to configure UP events for the service.
- Client applications must be linked with the client thread or operating system library.
Answer: A, B, D
Explanation:
Configuring
FCF for OCI Clients OCI applications must connect to an Oracle RAC
instance to enable HA event notification. Furthermore, these
applications must perform the following steps to configure FCF for an
OCI client: Configure the service for your OCI connection pool to enable
connection load balancing and runtime connection load balancing. Also
configure the service to have Advanced Queuing notifications enabled, as
shown in the following example: $ srvctl modify service -d crm -s
ociapp.example.com -q TRUE -B THROUGHPUT -j LONG Set the context of the
environment for OCI calls on the client to enable subscriptions by using
the OCIEnvCreate() call, setting the MODE parameter value to
OCI_EVENTS, as follows: (void) OCIEnvCreate(&myenvhp,
OCI_EVENTS|OCI_OBJECT, ...); Link the application with a thread library.
After linking with the thread library, the applications can register a
callback that is invoked whenever a FAN event occurs. Oracle® Real
Application Clusters Administration and Deployment Guide 11g Release 2
(11.2)
QUESTION: 138
Assuming
a RAC database called ORCL, select three statements that
correctly demonstrate management actions for the AP service.
- To start the AP service, execute: srvctl start service -d ORCL -s AP
- To disable the AP service on the ORCL4 instance, execute: srvctl disable service-d ORCL -s AP -i ORCL4
- To stop the AP service, execute: srvctl stop service -s AP
- To make ORCL5 a preferred instance for the AP service, execute: srvctl set service -d ORCL -s AP -i ORCL5 -r
- To relocate the AP service from the ORCL5 instance to the ORCL4 instance, execute: srvctl relocate service -d ORCL -s AP -i ORCL5 -t ORCL4
Answer: A, B, E
Explanation:
SRVCTL Command Reference
srvctl start service -d db_unique_name
[-s "service_name_list" [-n node_name | -i instance_name]] [-o start_options]
srvctl disable service -d db_unique_name
-s
"service_name_list" [-i instance_name | -n node_name] srvctl stop
service -d db_unique_name [-s "service_name_list" [-n node_name | -i
instance_name] [-f]
srvctl relocate service -d db_unique_name -s service_name
{-c source_node -n target_node | -i old_instance_name -t new_instance_name} [-f]
Oracle® Real Application Clusters Administration and Deployment Guide 11g Release 2 (11.2)
QUESTION: 139
Which two actions in a warehousing RAC database may cause concurrent cross- instance calls leading to I/O contention?
- truncate table statements
- select statements referring to non-partitioned tables
- drop table statements
- insert statements where each instance inserts into different partitions of a partitioned table
Answer: A, C
Explanation:
Concurrent
Cross-Instance Calls: Considerations In data warehouse and data mart
environments, it is not uncommon to see a lot of TRUNCATE operations.
These essentially happen on tables containing temporary data. In a RAC
environment, truncating tables concurrently from different instances
does not scale well, especially if, in conjunction, you are also using
direct read operations such as parallel queries. As shown in the slide,
a truncate operation requires a cross-instance call to flush dirty
blocks of the table that may be spread across instances. This
constitutes a point of serialization. So, while the first TRUNCATE
command is processing, the second has to wait until the first one
completes. There are different types of cross-instance calls. However,
all use the same serialization mechanism. For example, the cache flush
for a partitioned table with many partitions may add latency to a
corresponding parallel query. This is because each cross-instance call
is serialized at the cluster level, and one crossinstance call is needed
for each partition at the start of the parallel query for direct read
purposes. D60488GC11 Oracle 11g: RAC and Grid Infrastructure
Administration Accelerated 14 – 27 What Application Design
considerations should I be aware of when moving to Oracle RAC? The
general principals are that fundamentally no different design and coding
practices are required for RAC however application flaws in execution
or design have a higher impact in RAC. The performance and scalability
in RAC will be more sensitive to bad plans or bad schema design.
Serializing contention makes applications less scalable. If your
customer uses standard SQL and schema tuning, it solves > 80% of
performance problems Some of the scaleability pitfalls they should look
for are:
- Serializing contention on a small set of data/index blocks--> monotonically increasing key--> frequent updates of small cached tables--> segment without automatic segment space management (ASSM) or Free List Group (FLG)
- Full table scans--> Optimization for full scans in 11g can save CPU and latency
- Frequent invalidation and parsing of cursors--> Requires data dictionary lookups and synchronizations
- Concurrent DDL ( e.g. truncate/drop ) Look for:
- Indexes with right-growing characteristics--> Use reverse key indexes--> Eliminate indexes which are not needed
- Frequent updated and reads of “small” tables--> “small”=fits into a single buffer cache--> Use Sparse blocks ( PCTFREE 99 ) to reduce serialization
- SQL which scans large amount of data
--> Perhaps more efficient when parallelized
-->
Direct reads do not need to be globally synchronized ( hence less CPU
for global cache ) RAC: Frequently Asked Questions [ID 220970.1]
Oracle 1Z0-058 Exam (Oracle Real Application Clusters 11g(R) Release 2 and Grid Infrastructure Administration) Detailed Information
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Oracle 1z0-058 Tests
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VIDEO: New Oracle Certification Exam - ">1Z0-058 "11g Release 2: RAC & Grid Infrastructure Administration"
Jay Norton–Oracle University’s Director of Database & Systems Curriculum Product Management introduces the new “11g Release 2: RAC & Grid Infrastructure Administration” exam (">1Z0-058): Exam: “11g Release 2: RAC & Grid Infrastructure ...Article by ArticleForgeDiscount Oracle 1z0-058 Exam Preparation Materials
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