1© copyright 2011 emc corporation. all rights reserved. emc next-generation backup and recovery for...

1© Copyright 2011 EMC Corporation. All rights reserved.

EMC Next-Generation Backup and Recovery for OracleApollo AguilanEMC Backup Recovery Systems


Agenda• Problems many database administrators face

• Overview of Oracle Recovery Manager (RMAN) functional components

• Key features of EMC Data Domain deduplication storage systems

• Impact of Data Domain deduplication in an Oracle environment

• Customer Experience

• Summary

• Questions


Problems Many Database Administrators FaceToo many for this talk so we’ll focus on just backup and recovery• Non-stop growth and proliferation

• Backup windows remain approximately the same

• Recovery is just as important and often overlooked

• Limited online retention– Increased frequency of recovery for audits, troubleshooting,

updates, etc.

• Archive (aka, ILM) becoming increasingly important– Some data must be retained for 5 years, 7 years, forever….


RMAN – What Is It?• Oracle’s included backup /

recovery utility– Supports full, incremental, and image

backups– Retains backup information in the control file

and (optionally) a separate database catalog– Many configuration options to tailor to users’

requirements– Automatically eliminates unused data blocks

from most backups

For those in the audience that don’t already know:


Third Party Media Managers

Media Management Layer (MML) API

Backup

RMAN Repository (Control File)

Target Database

Flash Recovery Area (FRA)

RMAN Client

Disk

Backup

Recovery Catalog

Tape

Overview of RMAN Functional Components


Third Party Media Managers

MML API

Backup

RMAN Repository (Control File)

Target Database

FRA

RMAN Client

Disk

Backup

Recovery Catalog

Overview of RMAN Functional Components


Data Domain Deduplication Storage Systems

Data Domain


Performance: CPU-Centric versus Spindle-Bound

Thro

ughpu

t M

B/s

50

6,000

Number of Disk Spindles

50 100 150 200

Data Domain

Fibre Channel SATA

Mostdeduplication

vendors


Deduplication at Backup / Recovery Speeds

• 102,400 lookups/sec.: is it already in the multi-TB

store?

– 800 MB/sec, for 8KB segment: >100K lookups per second

– If random lookups: very slow

– Each disk: 1 MB/sec

• E.g. for a 7.2KB RPM Seagate 1TB SATA drive: <120

seeks/second

• 120/second @ 8KB segment: 0.96 MB/sec/disk

– Would need 830 disks to go 800 MB/sec (like most dedupers

today)

• This is 4 full height racks of nothing but SATA disks (16 drives /

3U rack)

Same performance, in less than half a full height rack


SISL Scaling Architecture

• Check uniqueness with Summary

Vector

• Check in-memory fingerprint cache

• Key resultsSee:

http://www.usenix.org/events/fast08/tech/full_papers/zhu/z

hu.pdf

• Data Domain answer: SISL™– Stream-informed Segment Layout

includes:• Summary Vector in RAM says if segment is

new• Segment Localities minimize seeks if answer

is on disk


Data Domain BasicsEasy integration with existing environment

Replication

CIFS, NFS, NDMP, DD

Boost

Ethernet

Virtual Tape Library (VTL)

over Fibre Channel

DD890 appliance

Control Tier Target Tier Disaster Recovery Tier

2U 2 to 10 ports 10 and 1 Gigabit Ethernet; 8 Gb/s Fibre Channel RAID 6 Up to 285 TB usable capacity with shelves 2 TB or 1 TB 7.2K rpm SATA hard disk drives in shelf File system NVRAM N+1 fans and redundant, hot-plug power supplies

DD890 appliance

Backup and archive

applicationsEMC

Symantec

CommVault

Tivoli Software

BakBone Software

Quest


EMC Data DomainRMAN disk-only backup and recovery strategies

ProductionDatabase

Dev/TestDatabases

DRDatabases

DR Restores can be performed manually or

automated via scripts

RMAN backups are performed natively via

NFS/CIFS

Data Domain Deduplication

Storage

Operational Restores can be leveraged for

Dev/Test environment refresh

RMAN backups are replicated automatically using minimal

bandwidth

Data Domain Deduplication

Storage

• Simplifies the backup process– RMAN disk-only backup

and recovery strategies are more straightforward

• Leverages Oracle Enterprise Manager– GUI for managing

backups, restore points, creating backup reports, etc

• Supports other Oracle backup capabilities– Incremental merge– Flash Recovery


“This is the format for a quote slide.”

Attribute


Second Friday Full Backup

B C D E F L G H

Data Deduplication: Technology OverviewStore more backups in a smaller footprint

A B C D E F G H I J

Friday Full Backup

A B C D A E F G

Mon Incremental A B H

Tues Incremental C B I

Thurs Incremental A C K

Weds Incremental E G J

Backup Estimated Data Logical Reduction Physical

Monday Incremental 100 GB 7–10x 10 GB

Tuesday Incremental 100 GB 7–10x 10 GB

K L

Wednesday Incremental 100 GB 7–10x 10 GB

Thursday Incremental 100 GB 7–10x 10 GB

Second FRIDAY FULL 1 TB 50–60x 18 GB

TOTAL 2.4 TB 7.8x 308 GB

FRIDAY FULL 1 TB 2–4x 250 GB


Data Integrity: Data Invulnerability Architecture

OtherRAID 6NVRAMSnapshots

End-to-end data verificationChecksumDeduplication, write to diskVerify

Self-healing file systemCleaningExpired dataDefragVerify

Deduplication

Local Compression

RAID

File System

GenerateChecksum

VerifyData Verify the file

system metadata integrity

Verify user data integrity

Verify stripe integrity

End-to-end data verification


Disk

1 TB

Disk

1 TB

Disk

1 TB

Weekly Full Backup – With Deduplication

RMAN> ALLOCATE CHANNEL CH1 DEVICE TYPE DISK FORMAT ‘/dd/backup/ora.weekly/%U’;RMAN> ALLOCATE CHANNEL CH2 DEVICE TYPE DISK FORMAT ‘/dd/backup/ora.weekly/%U’;RMAN> BACKUP AS COPY TAG ‘MAY9’ DATABASE INCLUDE CURRENT CONTROLFILE;RMAN> BACKUP ARCHIVELOGS TAG ‘MAY9’ ALL NOT BACKED UP DELETE ALL INPUT;

Target DB

1 TB

Weekly: Full image backups

Before: Without deduplication



Target DB

1 TB


Full

500 GB500 GB

After: With deduplication




Target DB

1 TB

Deduplication applied to fulls requiring much less disk


Full

500 GB500 GB

After: With deduplication



Daily Incremental Backup – With Deduplication

Target DB

1 TB

RMAN> ALLOCATE CHANNEL CH1 DEVICE TYPE DISK FORMAT ‘/dd/backup/ora.weekly/%U’;RMAN> ALLOCATE CHANNEL CH2 DEVICE TYPE DISK FORMAT ‘/dd/backup/ora.weekly/%U’;Run {

RECOVER COPY …BACKUP INCREMENTAL …

}

Daily: Incremental backup with update

500 GB Weekly Fulls

Incrementals after deduplication


Target DB

1 TB

RMAN> ALLOCATE CHANNEL CH1 DEVICE TYPE DISK FORMAT ‘/dd/backup/ora.weekly/%U’;RMAN> ALLOCATE CHANNEL CH2 DEVICE TYPE DISK FORMAT ‘/dd/backup/ora.weekly/%U’;Run {

RECOVER COPY …BACKUP INCREMENTAL …

}

Daily: Incremental backup with update

500 GB Weekly Fulls

Daily Incrementals

Incrementals after deduplication

Daily Incremental Backup – With Deduplication


Benefits of Using Inline Deduplication• Daily fulls instead of incrementals

• Longer online retention of full backup images

• No requirement for other backup software plug-ins

• Non disruptive introduction into RMAN process

• Simplified replication using EMC Data Domain Replicator Software

• Ideal location for Flashback Recovery Area

• Incrementally updated backups


Full

Sun Wed ThuMon Tue SatFri

DB Snap

Snap

Snap

Snap

Snap

Snap

Incremental MergeEMC Data Domain combines rapid cloning and deduplication

• Results in up-to-date nightly full images available for rapid recovery

Incremental

First image backup2X storage savings

• Nightly take cumulative incremental; apply to snapshot of weekly full


Alternatives Oracle Backup Options• RMAN to 3rd Party Backup Media

Management Layer (MML)/ Serial Backup Tape (SBT)– Makes random access disk look like streaming tape for VTL

support– Limits the options available to the DBA for backing up, cloning,

merging, etc.– RMAN communicates through MML to agent on 3rd party backup

application media server– Can front a Data Domain system as either disk-based backup or

VTL– All RMAN I/O is via MML which presents only a DEVICE TYPE TAPE

Data Domain Systems can work with an enterprise backup application but does not require it.


Data Domain Boost + RMAN = Next-Generation Backup and Recovery for Oracle

Data Domain

Oracle Database Administrator self-reliance

Superior Backup and Recovery Performance

Replication Policy Management Takes advantage of SBT integration using standard RMAN scripting tools for simple setup


Distributed Segment Processing Enabled– Distributes parts of deduplication workflow to SBT

plug-in on Oracle database server Anchors and fingerprints segments Checks with Data Domain system to find which

segments are new/unique Compresses and sends new segments only

– Avoids sending duplicate data to Data Domain system – Provides load balancing and link failover– Supported with single controller Data Domain

systems, Global Deduplication Array and DD Archiver

DD Boost for RMAN Distributed Segment Processing


DD Boost for RMAN – Optimized Replication

Managed, bandwidth optimized replication– Oracle server directs replication of individual backups using

RMAN– Data Domain system replicates only unique compressed

segments– Reduces workload on the Oracle server– Multiple topologies – one-to-one, bi-directional, one-to-many,

many-to-one, hierarchical– Encrypted optimized replication for security over WAN

transparent to Oracle servers

Start Replication

1

Oracle Database

CatalogLocal Data

Domain system

Secure Data Transfer

3 DoneCopy

2

Copy 1

Update Catalog

4 Copy 1

DR site Data Domain system

2Copy

2


Advanced Load Balancing and Link Failover

• Advanced Load Balancing & Link Failover– DD Boost level aggregation of multiple 1GbE or

10GbE links on Data Domain system• Backup/restore job load automatically distributed on

multiple ports on DD system

– Dynamic load balancing• DD Boost library negotiates with the Data Domain system

for an interface • Load distribution based on number of jobs on the interfaces

– Transparent failover of jobs• In-flight jobs on failed ports on DD system are transparently

moved over to healthy links

– Can be used in conjunction with network level / switch assisted aggregation


Data Domain Boost for RMAN - Demonstration


Summary• How deduplication benefits Oracle/RMAN backups

– More online retention– Less data to replicate– Allows the benefits of incremental update/merge backups using less disk

space

• Simplification– Minimal changes to the environment– DBA’s familiarity with NAS storage

• Savings– Less disk-based storage for longer retention– Reduce the cost of tape consumptions– Administrative cost– Less floor space


More Information…• For more information on EMC Data Domain

deduplication storage systems and Oracle, contact your EMC sales representative or visit

http://www.datadomain.com/solutions/oracle.html




Q&A


THANK YOU

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