nearstore vtl technology advantages. confidential. restricted to netapp employees and channel...

NearStore VTL Technology Advantages

Confidential. Restricted to NetApp employees and Channel Partners under NDA. © Copyright 2006 Network Appliance Inc. All rights reserved.2

18-Sep06

Key VTL Feature Comparison

Feature NetApp EMC DL Sun/STK IBM VTS Fujitsu-

Siemens HDS

Hardware Compression Yes Yes No Yes Yes No

Self-tuning Yes No No No No No

Direct Tape Creation Yes

Yes, uses up to 2x

more tapes

Yes, uses up to 2x

more tapes

Yes, uses up to 2x

more tapes

Yes, non-standard

tape formatNo

Shadow Tapes Yes No No No No No

Tape Smart Sizing Yes No No No No No

Total Technology ownership

YesNo - OEMs FalconStor

VTL SW

No - OEMs FalconStor

VTL SW

No - OEMs FalconStor

VTL SW

No - OEMs EMC disk

array

No - resells Diligent VTL SW


18-Sep06

NearStore VTL advantages

Scalability– From 5TB – 512TB without any “forklift” replacement

Hardware Accelerated Compression– Reduces storage costs by 50 - 67% without sacrificing performance

Self-Tuning– Automatically optimizes performance; no manual tuning is required

Direct Tape Creation– Fast and efficient out-of-band physical tape creation– Shadow Tapes for fast offsite tape creation and disk speed restores– Tape Smart Sizing for 50% savings in physical tape vs. other VTLs

NetApp Total VTL Technology Ownership– Design simplicity, better long term support and product

enhancement Investment Protection

– Common hardware architecture provides flexibility


18-Sep06

NearStore VTL hardware compressionvs. VTL’s using software compression

Primary storage protected during a backup window, 2:1 data

NearStore VTL with HW compression

Competing VTL with SW compression

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0

Pri

mar

y S

tora

ge

(TB

)

4 8 12 16 20 24

Backup Window (hours)


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enhancement

Investment Protection– Common hardware architecture provides flexibility


18-Sep06

Other VTLs require manual tuning

Other VTLs

Backup StreamsVirtual tapes reside

at fixed locations

Static load balancing does not prevent hot spots

Ongoing manual tuning is required


18-Sep06

NearStore VTL self-tuning technology

60MB/s

Dynamically BalancedBackup Streams Virtual tapes do not

reside at fixed locations

Backup streams are dynamically load balanced across disk LUNs

Provides optimal performance without tuning

NearStore VTL


18-Sep06

NearStore VTL self-tuning technology

60MB/s

Dynamically BalancedBackup Streams

Backup streams are automaticallyre-balanced as the backup load changes

NearStore VTL


18-Sep06

RAID Group 2

What happens when a disk fails?Why it is important to be integrated at the RAID layer

RAID Group 1

1: RAID group becomes degraded• Single drive failure occurs

2: VTL OS redirects write activity to other RAID groups• Degraded RAID group becomes read-only

3: Fast rebuild• Rebuild ignores empty space and reconstructs only the data using VTL OS parity

RAID Group 3 RAID Group x. . .

4: RAID group is back online 4x to 20x faster than competing VTL

systems


18-Sep06

NearStore VTL RAID group rebuildsFast rebuilds reduce the risk of data loss

VTL600 CDL710

Reduced riskof data loss

Increased riskof data loss

RAID Rebuild Time Comparison

0.68

19.38

0

20

HoursRequired

Source: Veritest Performance Comparison, July 2006


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enhancement



18-Sep06

The VTL copies to tape Backup application manages retention

policies and tracks tape locations Improves tape drive performance Reduces wear on tape media Reduces the need to multiplex backups Reduces the load on backup servers Reduces complexity

Backup Server

Tape Library

VTL

Backup Server

Tape Library

VTL

1 2

The backup server copies to tape Backup application manages retention policies and

tracks tape locations Requires the server to process every backup twice Reduces CPU cycles available for primary backup

and recovery jobs Always requires an additional license for the physical

tape library

Two Options for Integrating NearStore VTL with Existing Tape Libraries


18-Sep06

NetBackup support for NearStore VTLDirect Tape Creation

“ Symantec supports the methodology for the creation of physical tape media, readable by NetBackup, whose barcode is synchronized with the virtual media on the NearStore VTL (Direct Tape Creation), as well as direct access to physical media behind the VTL system (pass through mode). This entire process retains full traceability of the media through the NetBackup catalog.”

- Source: Veritas NetBackup Enterprise Server and Server 6.0 Hardware Compatibility Lists, July 2007


18-Sep06

Direct Tape Creation Restore Options

Data is accessed within seconds and restored 4x to 10x faster than tape

Eliminates mechanical delays found in tape drives and libraries

RAID reliability ensures restores always work

Disk speed restoresData Center

UNIX Servers

Windows Servers

HeterogeneousStorage

Backup Server

Import/Export to Tape

Fast, flexible restores

Fast pass-through restores data before copying tape contents to disk

Tapes are always written in the native backup application format

Data can be restored directly from tape without using the VTL

NearStoreVTL

Restore from disk

Direct from tape

Pass-through from tape


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enhancement



18-Sep06

NearStore VTL Direct Tape CreationUsing Shadow Tapes for fast restores

1 The backup application writes data to virtual tape ABC100. The backup catalog records the barcode and associates it with the user-defined retention policy for the physical tape

How Shadow Tapes WorkData Center

NearStore VTL

Backup Application Server

Physical Tape Library

Virtual tape ABC100 is cloned to a corresponding tape in the physical library using the identical barcode

2

When virtual tape ABC100 is ejected from the virtual library, a hidden copy is stored in the Shadow Tape pool and retained on disk

3

Physical tape ABC100 is removed from the physical library and sent to the Offsite Vault

44

Shadow TapePool3

Tape ABC100 is safely stored offsite and a Shadow Tape copy remains on VTL disk for fast restores

5

Offsite Vault

catalog

ABC100

12

5


18-Sep06

Symantec support for Shadow Tapes

“The new Shadow Tape feature extends the value of our customers’ investments in NetBackup software by automating the rapid retrieval of backup data from disk.”

“ NetBackup releases 6.0 and higher integrate with NearStore VTL Shadow Tape to facilitate automatic restores of data that exists on Shadow Tape copies.” - Source: Veritas NetBackup Enterprise Server and Server 6.0 Hardware Compatibility Lists, August 2007

- Source: Matt Kixmoeller, Symantec senior director of product management for NetBackup, July 2006


18-Sep06






enhancement



18-Sep06

Virtual Tape Smart SizingOther VTLs don’t account for tape compression

Other VTLs do not predict how data will compress when it reaches the physical tape drive

340GB Data

2 x 200GB physical tapes,each w/100GBof compressed

data

50% Utilized

Other VTLs Tape Library

Tape drivecompression

(1.7x industry average)2 x 200GBfixed capacity virtual tapes

Virtual Tape sizing choices are: Use uncompressed native size only -> poor utilization Guess at compression ratio -> wrong guess Use disk compression as guideline for tape compression -> not reliable


18-Sep06

NearStore VTL samples backup data and adjusts each virtual tape to fit – without impacting performance

NearStore VTL

Virtual Tape Smart SizingFast and efficient direct tape creation

1x 340GB

340GB Data

1x 200GBCompressed

Smart SizedVirtual Tape

Automatically Resizes

200GBPhysical Tape

Optimized Tape

Utilization

Tape Library

Tape drivecompression

(1.7x industry average)

Mimics physical tape drive compression -> optimized utilization

Different algorithms for different tape technologies -> no guessing Tape and disk compression are independent -> no guessing


18-Sep06

Why Virtual Tape Smart Sizing mattersEnables efficient VTL tape creation

BeforeInstalling VTL

NearStore VTLDirect Tape Creation

Other VTLDirect Tape Creation

On average, the other VTLs will require twice as many tapes as NearStore VTL when using direct tape creation

More Tapes/

More $$


18-Sep06






enhancement



18-Sep06

3rd Party VTL Software & GUI

Linux OS

3rd Party Server

Array Mgmt SW

Disk Array OS

Array Controller

SATA disk shelves

NetApp VTL technology ownershipSimplicity, long-term support and enhancements

Other VTLs NearStore VTL

Standard Web Browser

NetApp VTL OS

NetApp VTL Controller

NetApp SATAdisk shelves


18-Sep06

Investment protectionCommon hardware architecture provides flexibility

NetApp FAS SystemNetApp NearStore VTL

Virtual Tape Personality

• VTL OS• Journaled Object Store (JOS™)• Fibre Channel connectivity

Disk Personality

• Data ONTAP• WAFL• Fibre Channel, iSCSI or NAS

connectivity

On-site System Conversion

VTL Deduplication Technology


18-Sep06

VTL De-duplication Benefits

Longer backup retention on disk

Potential for dramatic reductions

in media costs for D2D backup– Each 1GB of disk stores > 20x of

backup data

Reduces data center footprint

Reduces power requirements


18-Sep06

De-duplication – hype or reality ?

Dedupe (compression) ratio is the amount of storage consumed after deduplication, divided by the amount of storage that would have been consumed if no deduplication had been applied, expressed in an N-to-1 fashion– E.g. if 100TB de-dupes to 50TB, compression ratio is

2-to-1

Expressed generically, if X bytes of data dedupes to Y bytes of data:– Compression ratio is (X/Y)-to-1


18-Sep06

System-wide vs. Image-wide ratios5% data change between full backup images…

Time

95% Identical

5% Different

System-wide ratio = 2/(1+.05) = 1.9-to-1 Image-wide ratio = 1/0.05 = 20-to-1


18-Sep06

System-wide vs. Image-wide ratios5% data change between full backup images…

Time

95% Identical

5% Different

System-wide ratio = 3/(1+.05+.05) = 2.7-to-1 Image-wide ratio = 1/0.05 = 20-to-1


18-Sep06

Computing dedupe/compression ratios…

Compression ratios should be expressed in context– System-wide– Virtual Library-wide– Volume-wide (Virtual Tape-wide)– Image-wide

System-wide and Library-wide ratios build gradually over time

Volume-wide and Image-wide ratios can be significant immediately


18-Sep06

NearStore VTL compression roadmapHigh performance dedupe and hardware compression

Dedupe and hardware compression can be used together to maximize space savings and performance– High-speed deduplication is done first– Unique data is then compressed before it is stored on disk

Standard compression multiplies the effect of deduplicationExample:– Backup data dedupes at 12:1 over time– Unique data then compresses at 2:1– Total reduction in data size equal 24:1

Future VTL datadedupe option

High performance hardware compression


18-Sep06

Number of full backups 1 2 3 … 30

Cumulative data backed-up 20 TB 40 TB 60 TB 600 TB

Total data stored on disk 10 TB 10.5 TB 11.0 TB 24.5 TB

Ratio after dedupe and compression

2 to 1 3.8 to 1 5.4 to 1 24 to 1

Example: Dedupe space savings of 24:1Thirty full backups of 20 TB with 5% data change

Unique data stored on disk … 10 TB + 0.5 TB + 0.5 TB . . . + 0.5 TB

Data backed-up …………… 20 TB + 20 TB + 20 TB . . . + 20 TB

Questions?

Email [email protected]

© 2007Network Appliance, Inc. All rights reserved. NetApp and NearStore are registered trademarks of Network Appliance Inc. and Decru DataFort is a trademark of Decru Inc., a Network Appliance company . Unix is a registered trademark of the Open Group. All other trademarks belong to their respective owners and should be treated as such.

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