2. Re-defining Database Storage Management
Thinking Out of the Box
Re-defining Database Storage Management
Ara Shakian Principal Product Manager
Oracle Server Technologies

3. <Insert Picture Here>
Agenda
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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

4. Automatic Storage Management
A storage manager designed to manage Oracle Database files
ASM Disk Group
ASM Disk
Volume Manager
1MB/128KB striping
Flexible mirroring
Online disk reconfigurations and
automatic rebalancing
ASM Disk
ASM Disk
ASM Disk
ASM Disk
File System
Even data distribution with optimal
performance
Automatic file management using
Oracle Managed Files (OMF)
+DATA datafiles file1… filen controlfile redolog1
Cluster support with Oracle Clusterware

5. ASM High Level Architecture
Database Instance
ASM
File layout info - Update statistics - Health info
SGA
An Integrated Solution
ASM manages meta-data
NOT in IO path
Optimal Performance
ASM
ASM file
extents
Service
Requests DB
Processes
LUN
DB I/O

6. ASM Key Values No addition cost!
Reduce Cost and Complexity Without Compromising Performance or Availability
Simplifies and Automates
Increases Storage Utilization Uptime & Agility
Predictable Performance & Availability
No addition cost!

7. Storage Management Roles & Responsibilities
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Storage Management Roles & Responsibilities

8. Storage and ASM Administration
SYS Admin Role
ASM Admin Role
Pre-Installation
Create LUNs
Set ownership & permissions to ‘Oracle User’
Installation
Oracle Universal Installer (OUI)
Conf Assistants
Create disk groups
Normal Operation
Monitor capacity & availability
Provision capacity

9. 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

10. Traditional LVM/FS vs ASM Add Capacity
Add Disk to OS
Create volume(s) with Volume Manager
Create File System over volume
Figure out data to move to new disk
Move data to new files
Rename files in database
Re-tune I/O
ASM
Add Disk to OS
Add disk to a disk group!

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Three Flexible
Management Interfaces
EM Database Control or Grid Control
SQL*Plus interface
ASMCMD tool
Managing ASM is Simple

12. ASM Home Page

13. ASM Performance Page

14. ASM Administration Page

15. ASM Configuration Page

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Three Flexible
Management Interfaces
EM Database Control or Grid Control
SQL*Plus interface
ASMCMD tool

17. ASM SQL*PLUS Command Structure1
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; 2

18. Alter diskgroup SQL*Plus Command Structure3
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

19. ASM Views - Examples V$ASM_DISKGROUP V$ASM_DISK V$ASM_DISKGROUP_STAT
Description
V$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

20. Empower the Sys Admin and DBA
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Three Flexible
Management Interfaces
EM Database Control or Grid Control
SQL*Plus interface
ASMCMD tool
Empower the Sys Admin and DBA

21. 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

22. ASM Utilities Simplify Data Transfer and Migration
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ASM Utilities Simplify Data Transfer and Migration

23. 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

24. ASM and XML DB Interface
ASM files can be
accessed from XML DB
virtual folders /sys/asm
manipulated
HTTP/WebDAV
FTP
DBMS_XDB API

25. Enhanced Migration Options DBMS_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

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Oracle Database 11g ASM Beta Features

27. X ASM 11g Beta Features Fast Disk Resync RAC RAC/ASM ASM 11gR1 Network
Manageability
Enhancements
- Disk Group Attributes - ASMCMD lsdisk - Metadata backup/restore - Off-line faster rebalance
SYSASM
Role
- CONNECT / AS SYSASM
Rolling
Migration
ASM
11gR2
RAC
ASM
RAC/ASM
11gR1
Preferred
Mirror Read X
Transient
Failures
Fast Disk
Resync
- Incremental Repair
- Disk Group Attributes
Network
LUN
LUN
LUN
LUN
Fast VLDB
Start
- Variable File Extents - Larger AUs

28. Hundreds of ASM Customers In Production
                     
Hundreds of ASM Customers In Production

29. 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 Systems Talk America Holdings, Inc.

30. 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 Prince
Chief Technology Officer

31. Conclusion Which management style would you prefer? Mgt RAW Overhead
Time
RAW
Which management style would you prefer? FS
ASM
* Not based on real statistics

32. ASM Featured in OOW 2006 ID Time Room Title S281246 Wed 2:30 PM
303 – South
ASM Architecture
S281247
Wed 4:00 PM
Dell IT: User proven ASM deployments
S281258
Thurs
8:00 AM
Fidelity National Financials: Migrating and consolidating DB2 and SQL Server onto RAC/ASM 10g

33. Q
& A