Ara ShakianPrincipal Product ManagerOracle Server Technologies

Thinking Out of the BoxRe-defining Database Storage Management

Agenda

<Insert Picture Here>• What is Automatic Storage Management (ASM)• Functionality and architecture

• Admin roles and responsibilities• Managing ASM is simple

• Three flexible management interfaces

• ASM utilities• Oracle Database11g ASM beta features• Customer proof points• Summary

Automatic Storage Management A storage manager designed to manage

Oracle Database files

• Cluster support with Oracle Clusterware

• Volume Manager• 1MB/128KB striping• Flexible mirroring• Online disk reconfigurations and automatic rebalancing

• File System• Even data distribution with optimal performance• Automatic file management using Oracle Managed Files (OMF)

ASM DiskASM Disk

ASM DiskASM Disk

ASM Disk

ASMDisk Group

+DATA datafiles file1… filen controlfile redolog1

ASM High Level Architecture

Database Instance ASM

DB Processes

ASM

- File layout info- Update statistics- Health info

ASM file extents

ServiceRequests

• An Integrated Solution

• ASM manages meta-data• NOT in IO path• Optimal Performance

LUNDB I/O

SGA

Predictable Performance &

Availability

Increases Storage Utilization

Uptime & Agility

Simplifies and Automates

Reduce Cost and Complexity Without Compromising

Performance or Availability

No addition cost!

ASM Key Values

Storage ManagementRoles & Responsibilities

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ASM Admin Role

Pre-Installation

• Create LUNs• Set ownership &

permissions to ‘Oracle User’

Normal Operation

• Monitor capacity & availability

• Provision capacity

Installation

• Oracle Universal Installer (OUI)

• Conf Assistants

• Create disk

groups

SYS Admin Role

Storage and ASM Administration

ASM Reduces Management Complexity

Eliminate

• LVM mgt for Oracle DB• File system mgt for Oracle DB• 3rd party clustering software• File name management• Reshuffling, reallocating,

moving datafiles • I/O performance tuning

Reduce significantly

• LUN mgt (larger LUNs)• Less frequent DBA & sys

admin interaction• Manual error prone tasks• Troubleshooting• Expanding Capacity

Traditional LVM/FS vs ASM Add Capacity

LVM/FS

1. Add Disk to OS

2. Create volume(s) with Volume Manager

3. Create File System over volume

4. Figure out data to move to new disk

5. Move data to new files

6. Rename files in database

7. Re-tune I/O

ASM

1. Add Disk to OS

2. Add disk to a disk group!

Managing ASM is Simple

1. EM Database Control or Grid Control

2. SQL*Plus interface

3. ASMCMD tool

<Insert Picture Here>Three Flexible Management Interfaces

ASM Home Page

ASM Performance Page

ASM Administration Page

ASM Configuration Page

Three Flexible Management Interfaces

1. EM Database Control or Grid Control

2. SQL*Plus interface

3. ASMCMD tool

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ASM SQL*PLUS Command Structure

• Create Disk Group• SQL> create diskgroup DataDG normal redundancy

2 failgroup controller1 disk

3 ‘/devices/diska1, ‘/devices/diska2’

4 failgroup controller2 disk

5 ‘/devices/diskb1, ‘/devices/diskb2’;

• Delete a Disk Group• SQL> drop diskgroup DataDG;

1

2

Alter diskgroup SQL*Plus Command Structure

• alter diskgroup DataDG ADD/DROP/RESIZE disk …• alter diskgroup … MOUNT/DISMOUNT …• alter diskgroup … ADD/ALTER/DROP TEMPLATE …• alter diskgroup … ADD/DROP DIRECTORY/ALIAS/FILE …• Select all V$ASM_* views

3 Alter Disk Group

ASM Views - ExamplesView Description

V$ASM_DISKGROUP Describes a disk group (number, name, size related info, state, and redundancy type)

V$ASM_DISK Contains one row for every disk discovered by the ASM instance, including disks that are not part of any disk group.

V$ASM_DISKGROUP_STAT Has the same columns as V$ASM_DISKGROUP, but to reduce overhead, does not perform a discovery when it is queried.

V$ASM_DISK_STAT Has the same columns as V$ASM_DISK, but to reduce overhead, does not perform a discovery when it is queried.

V$ASM_FILE Contains one row for every ASM file in every disk group mounted by the ASM instance.

V$ASM_TEMPLATE Contains one row for every template present in every disk group mounted by the ASM

V$ASM_ALIAS Contains one row for every alias present in every disk group mounted by the ASM

V$ASM_OPERATION Contains one row for every active ASM long running operation executing in the ASM

V$ASM_CLIENT identifies databases using disk groups managed by the ASM instance

Empower the Sys Admin and DBA

Three Flexible Management Interfaces

1. EM Database Control or Grid Control

2. SQL*Plus interface

3. ASMCMD tool

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ASM Command Line Interface (CLI)

ASM File Management

• Interactive Unix shell-like CLI for ASM file administration• ASMCMD> ls

• Non-interactive CLI mode for scripting and batch processing• ASMCMD ls –lH

+DATAFILE/ORCL/CONTROLFILE

ASM Utilities

Simplify Data Transfer and Migration

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ASM Migration Utility with EM Grid Control

• Database migration• Migrate DB files and recovery area to ASM

using RMAN

• Wizard walk-through • Create migration requests

• Schedule migration requests

• Report/monitor status of migration

ASM and XML DB Interface

• ASM files can be accessed from XML DB virtual folders /sys/asm

• ASM files can be manipulated

• HTTP/WebDAV• FTP• DBMS_XDB API

Enhanced Migration OptionsDBMS_FILE_TRANSFER Utility

• ASM to ASM • ASM to O/S file (new)• O/S file to ASM (new)• O/S file to O/S file

Oracle Database 11g ASM Beta Features

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ASM 11g Beta Features

RACASM

LUN LUN

RAC/ASM 11gR1

LUN LUN

NetworkPreferred

Mirror Read

ManageabilityEnhancements

- Disk Group Attributes - ASMCMD lsdisk- Metadata backup/restore- Off-line faster rebalance- Disk Group Attributes

Fast VLDBStart

- Variable File Extents- Larger AUs

XXTransientFailures

Fast Disk Resync

- Incremental Repair

SYSASM Role

- CONNECT / AS SYSASMRolling

Migration

ASM11gR2

                     Hundreds of ASM Customers In Production

What Talk America is Saying

“ASM is the best thing that has happened to databases since SQL.”

“ASM alone makes 10g worth while.”

“Storage has become a commodity, I only need to present it to 10g and ASM does the rest.”

Laurence Grant, Dir. of Enterprise Computing SystemsTalk America Holdings, Inc.

What Burlington Coat Factory is Saying

“Oracle Database 10g, RAC, ASM and RMAN empower an investment payback in 12 months, 50% improved storage utilization, 100% improved CPU utilization and much faster to backup and recovery”

Michael PrinceChief Technology Officer

Conclusion

FS

Mgt

Overhead

Time

RAW

Which management style would you prefer?

ASM

* Not based on real statistics

ASM Featured in OOW 2006

ID Time Room Title

S281246 Wed 2:30 PM

303 – South ASM Architecture

S281247 Wed 4:00 PM

303 – South Dell IT: User proven ASM deployments

S281258 Thurs

8:00 AM

303 – South Fidelity National Financials: Migrating and consolidating DB2 and SQL Server onto RAC/ASM 10g

AQ&