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Copyright © 2013, Oracle and/or its affiliates. All rights reserved. Insert Information Protection Policy Classification from Slide 12 of the corporate presentation template 1

Understanding Oracle RAC 12 c Internals Markus Michalewicz, Mark Scardina Director of Product Management

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Safe Harbor Statement

The following is intended to outline our general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. The development, release, and timing of any features or functionality described for Oracle’s products remains at the sole discretion of Oracle.

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Agenda

! Introduction ! The New Features in Oracle Grid Infrastructure and RAC 12 c

– Flex ASM

– Flex Cluster

! Policy-Managed Databases – Improved HA Management

– Dynamic Database Services

!

Multiple Subnet Support, Listeners & SCAN in Oracle RAC 12c ! Summary and Q&A

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The New Oracle RAC 12 c

Oracle RAC 12c provides**:

1. Better Business Continuity and High Availability (HA)

2. Agility and Scalability

3. Cost-effective Workload Management

Using ! Standardized and improved

deployment and management !

A familiar and matured HA stack

O r a c l e

R e a l A p

p l i c a t i o

n C l u s t

e r s ( R A

C )

O r a c l e

G r i d I n f r

a s t r u c t u

r e ( G I ) :

A u t o m a

t i c S t o r a

g e M a n a

g e m e n t

( A S M )

O r a c l e

C l u s t e r

w a r e ( O

C W )

O r a c l e

F l e x A S M

! " #

**Understanding Oracle RAC Internals 11g Rel. 2 : http://www.oracle.com/technetwork/products/clustering/overview/understandingrac11grel2internals-2010098.pdf

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The Setup for this Session What has been installed and configured so far?

vixen srvpool: frontofficecomet srvpool: backoffice

dancer srvpool: backoffice dasher srvpool: frontoffice

OS OL 6.4 OS OL 6.4

OS OL 6.4OS OL 6.4

Oracle GI for a cluster Oracle GI for a cluster

Oracle GI for a clusterOracle GI for a cluster

Oracle RAC Oracle RAC

Oracle RACOracle RAC

raccdb1

raccdb1_2

raccdb1_1

[RAC]> srvctl status database -d raccdb1 Instance raccdb1_1 is running on node comet Instance raccdb1_2 is running on node dancer Instance raccdb1_3 is running on node vixen Instance raccdb1_4 is running on node dasher

raccdb1_4

raccdb1_3

! 4-node cluster ! OL 6.4 UEK ! Oracle Grid Infrastructure 12c

– Per node installation

! Oracle RAC Database Home 12c – Shared installation on ACFS

! One Oracle Multitenant Container Database – DB name: raccdb1

– Deployed as a Policy-Managed Database

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New Memory Requirements Not an Oracle RAC internal – just something to mention

[GRID]> srvctl status asm ASM is running on comet,dasher,dancer

[GRID]> srvctl status mgmtdb Database is enabled Instance -MGMTDB is running on node dasher

[GRID]> ps -ef |grep pmon grid 3227 1 0 13:54 ? 00:00:02 asm_pmon_+ASM1 grid 3868 1 0 13:55 ? 00:00:01 mdb_pmon_-MGMTDB grid 7364 1 0 13:57 ? 00:00:01 apx_pmon_+APX1 oracle 7917 1 0 13:57 ? 00:00:02 ora_pmon_raccdb1_4

[RAC]> df -h Filesystem Size Used Avail Use% Mounted on ... tmpfs 1.7G 1.3G 475M 73% /dev/shm ...

Physical memory requirements with Oracle RAC 12c: 4GB

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Agenda

! Introduction ! The New Features in Oracle Grid Infrastructure and RAC 12 c

– Flex ASM

– Flex Cluster

! Policy-Managed Databases – Improved HA Management

– Dynamic Database Services

!

Multiple Subnet Support, Listeners & SCAN in Oracle RAC 12c ! Summary and Q&A

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Oracle ASM 12 c – Overview Oracle ASM 12 c Standard Deployment

ASM Cluster Pool of Storage

Disk Group BDisk Group AShared Disk Groups

Wide File Striping

One to One Mapping of ASM Instances to Servers

ASM Instance

Database Instance

ASM Disk

RAC Cluster

Node4Node3Node2Node1 Node5 ASM ASM ASM ASM ASM

ASM Instance

Database Instance

DB A DB A DBC DBB DB B DBB

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Introducing Oracle Flex ASM Removal of One to One Mapping and HA

ASM Cluster Pool of Storage

Disk Group BDisk Group AShared Disk Groups

Wide File Striping

Databases share ASM instances

ASM Instance

Database Instance

ASM Disk

RAC Cluster

Node5Node4Node3Node2Node1

Node5 runs as

ASM Client to Node4

Node1 runs as

ASM Client to Node2

Node1 runs as

ASM Client to Node4

Node2 runs as

ASM Client to Node3

ASM ASM ASM

ASM Instance

DB A DB A DBC DBB DB B DBB

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Supporting Pre-Oracle 12 c Databases Pre-Oracle 12 c Databases require a local ASM instance

ASM Cluster Pool of Storage

Disk Group BDisk Group AShared Disk Groups

Wide File Striping

Databases share ASM instances

ASM Instance

Database Instance

ASM Disk

RAC Cluster

Node5Node4Node3Node2Node1 ASM ASM ASM

DB A DB A DBC

ASM ASM

11g DB

11g DBDBB DB B DBB

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Oracle Flex ASM Configuration details

! Flex ASM introduces new local resources:

– At least one ASM listener

– One “proxy_advm” (per node) ! Used for ACFS access to Flex ASM instances

! Connections from a database instance to an ASM instance are based on SQLnet using listeners.

– The listener directs the connection to the least loaded ASM instance based on the load metric it maintains.

– The connection details are fetched from CSS global data

– The ASM instance to which the database instance connects to is listed in the database alert log:

! NOTE: ASMB connected to ASM instance +ASM1 (Flex mode; client id 0x10004)

– The userid and password supplied are also managed automatically. They are supplied while establishing the session, not while connecting.

[GRID]> crsctl stat res -t ------------------------------------------------------------------------------- Name Target State Server State details ------------------------------------------------------------------------------- Local Resources -------------------------------------------------------------------------------

ora.ASMNET1LSNR_ASM.lsnr ONLINE ONLINE comet STABLE ONLINE ONLINE dancer STABLE ONLINE ONLINE dasher STABLE ONLINE ONLINE vixen STABLE

... ora.DATA.dg

ONLINE ONLINE comet STABLE ONLINE ONLINE dancer STABLE ONLINE ONLINE dasher STABLE OFFLINE OFFLINE vixen STABLE

... ora.INFRA.dg

ONLINE ONLINE comet STABLE ONLINE ONLINE dancer STABLE ONLINE ONLINE dasher STABLE

OFFLINE OFFLINE vixen STABLE ...

ora.proxy_advm ONLINE ONLINE comet STABLE ONLINE ONLINE dancer STABLE ONLINE ONLINE dasher STABLE ONLINE ONLINE vixen STABLE

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Oracle Flex ASM Administering Flex ASM

! Check ASM mode using asmcmd ! Check where ASM instances are running using srvctl ! Check the configuration of ASM using srvctl

! Modify the ASM configuration using srvctl

! Cluster ASM listener: – Flex ASM can have its own network or overlap with the

private interconnect network used by RAC DB instances

– It is recommended to configure a full overlap of the private interconnect and the ASM network in current use cases:

[GRID]> asmcmd ASMCMD> showclustermode ASM cluster : Flex mode enabled

[GRID]> srvctl status asm ASM is running on comet,d