Information Means The World.. Enhanced Data Recovery Agenda EDR defined Backup to Disk (DDT) Tape Emulation (Tape Virtualization) Point-in-time Copy Replication

Information Means The World.Information Means The World.



Enhanced Data Recovery Agenda

• EDR defined• Backup to Disk (DDT)• Tape Emulation (Tape

Virtualization)• Point-in-time Copy• Replication Based Backup


Datalink Core Competency Matrix


What is Enhanced Data Recovery?

A backup and restore architecture that combines advanced software functionality with a disk based storage array to augment a traditional tape only solution.

Enables the concept of “Backup to disk, archive to tape”.


Yes63.6%

EDR Acceptance is GrowingQ: Do you have plans to implement disk based data recovery?

Source: Coughlin Associates


Definitions

Recovery Point – amount of time that has elapsed since the last known consistent copy of the data

Recovery Time – amount of time required to gain access to the data

Backup Window – amount of time available where production servers can be impacted by backup activity


Business Drivers• Growing storage capacities and rising

downtime costs• Pressure to reduce recovery time (RTO)• Pressure to minimize data loss (RPO)• Operations issues

– Shrinking backup windows– Reliability issues in large environments

• Media costs & media management getting out of control

We are seeing a dramatic rise in the cost and complexity of backup operations


What’s wrong with traditional backups?

• Slow restore capabilities• Reliability issues• Shrinking backup windows• Tape is a sequential access device

– Data written in a linear fashion– Seek times to find data are very time

consuming– Cartridge load times are high– Compression limited to linear algorithms


Enhanced Data Recovery is the Solution

• Enabled by falling disk prices (ATA & SATA)

• Also enabled by mature, advanced software functionality

• Leverages performance, reliability, and random access nature of RAID

• Augments tape capabilities


Backup to Disk


Backup to Disk

Recovery Point –Similar to enterprise backup to tape, however, improvement in reliability yields lower average recovery point.

Recovery Time – Full restore similar to tape, however, significant improvement for single files

Backup Window – Improvements in some scenarios, including situations where tape drives are not streamed, or when reliability problems cause frequent job restarts

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Backup to Disk Solution

Benefits: Drawbacks:•Fast file level restores –

improved productivity and less downtime

•Improves backup reliability – less exposure to lost data and improved staff productivity

•Reduction in tape resources – lower tape media costs

•Disk medium supports simultaneous reads and writes enabling real time cloning and restores during backup

•Typically no compression capabilities

•Can be disruptive to backup operation

•No reduction in IP network traffic

•Minimal benefit for full restores

•Enterprise backup software support for disk evolving


Tape Emulation


Tape Emulation

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Tap

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Tap

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Recovery Point – Similar to enterprise backup to tape, however, improvement in reliability yields lower average recover point.

Recovery Time – Full restore similar to tape, however, significant improvement for single files

Backup Window – Results will vary based upon environmental variables. In some cases, TE yields dramatic backup window benefits. In others, little to no benefit.


Tape Emulation SolutionBenefits: Drawbacks:•Compression capabilities•Non-disruptive to current

policies and procedures – no impact on productivity and lower TCO

•Fast file level restores•Minimized fragmentation

and file system management

•Improves backup reliability•I/O tuned for sequential

large block transfer•Enables reduction in tape

resources – lower cost•Can reduce backup time

•No reduction in IP network traffic

•Minimal benefit for full restores

•Proprietary layer of technology adds incremental cost and complexity


Point-in-time Copy


Point-in-time Copy

Recovery Point – reduced by splitting mirrors or taking snapshots

Recovery Time – Significantly reduced for full restore. Less convenient for file level restores, however.

Backup Window – If used as a foundation for off-host backup, PIT copy can greatly reduce the impact on production, allowing for backup within tight window

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Tap

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Poin

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Point-in-time Copy SolutionBenefits: Drawbacks:•Backup processing

removed from production servers – less production impact improves TCO

•Backup impact reduced to minutes

•Fast full restores – improved productivity (RTO)

•Enables consolidation of backup resources – lower cost

•Improved recovery point capabilities – less data loss (RPO)

•May be disruptive to current backup policies and procedures

•May not reduce tape media or tape automation resources

•Integration effort can be somewhat complicated


Replication Based Backup


Replication Based Backup

Recovery Point – Minimized for asynchronous replication, no lost data for synchronous replication

Recovery Time – Short because of on-line copy which can be used for single file restore or used as the active file system

Backup Window – Actual backup can be performed off-host, making backup window a moot concept

Tap

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Tap

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Rep

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ased B

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Rep

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ased B

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Replication Based Backup SolutionBenefits: Drawbacks:

•More frequent backups with more copies kept online – improved RPO

•Reduces tape media and automation resources – lower cost

•Simplifies media management

•Fast file & full restores•Replication based backup

reduces IP network traffic•Shortest RPO & RTO when

combined with snapshots•Improved consistency and

reduced risk through centralization of remote backup

•Good foundation for DR

•Disruptive to current backup policies and procedures

•Integration effort is somewhat complicated


Summary• Enhanced data recovery incorporating disk

technology is now cost effective and drives measurable business value

• There are distinct architectural approaches to using disk for data recovery and it is critical to understand the relative strengths and weaknesses of each

• Disk based architectures are currently used to augment, not replace, tape infrastructure


For more information contact:

Paul Marrero, Account ExecutivePhone: 425.462.6617/Cell:

[email protected]

Scott Robinson, Chief Technology Officer

Phone: [email protected]

Documents

Information Means The World.. Enhanced Data Recovery Agenda EDR defined Backup to Disk (DDT) Tape Emulation (Tape Virtualization) Point-in-time Copy Replication