1. Demystifying Deduplication

2. Deduplication eliminates redundant copies of data
What is deduplication?
Deduplication eliminates redundant copies of data
by leveraging pointers to point duplicate files or
blocks to a single object
APPROACH:
Eliminate redundant data
Start with the backup environment as the first phase
Maintain references to single instances of data across data store
Deduplication can decrease disk capacity requirements
by up to 98% and decrease bandwidth requirements for data transfer by up to 50 times.

3. Dell’s point of view on deduplication
Data Deduplication is a capacity optimization feature – not a capacity optimization solution
Need to understand what problem you are trying to fix
Dell can help find the right solution to your storage challenges
As deduplication matures it will be ubiquitous across a wide range of storage products
Deduplication integrated into software functionality provides the greatest benefits
Deduplication technology will expand beyond backup to include static archive data and inactive primary data

4. Deduplication – Confusion abounds
Different Architectures
Source
Target
Single Instance Storage
VTL
File
Block
Sub-block
Inline Processing
Post Processing
Different technologies

5. Unique data saved to disk
Types of deduplication A B C D E
Data object #1
Data object #2 F
Unique data saved to disk
Data deduplication eliminates common data at a file, block, or sub-block level.
File
aka Single Instance Store or SIS
Typically primary storage
Block
aka Sub-file or Fixed block
Typically secondary storage
Better dedupe ratios
Sub-block
aka Variable block or Byte-level
Best dedupe ratios
Most processor intensive
Disk Capacity
Required

6. Deduplication Enables Cost Effective Disk To Disk Backup
Shorten backup window and restore faster with B2D – At a cost similar to tape
Reduce storage capacity, power, cooling and space requirements
Centralize data protection and archive, reducing the burden on offices not staffed to manage it
Enable cost-effective DR
Backup to Disk with Dedupe 2
Primary
Disk
Deduplication
Replication
Backup
Archive
Secondary
Disk

7. Why optimize disk-based backup with deduplication?
B2D without deduplication
B2D with deduplication
10:1 ratio
Total capacity needed after 3 years (TB’s)
34.6
3.46
# drives needed 36 5
Total storage cost
~$34k
~$8k
Example – 20TB of data growing 20% per year
How long until the deduplicated storage capacity required equals 3 years without dedupe?
Just over 15 years

8. How deduplication fits into the backup environment
Application Servers
Backup Server
Deduplication Appliance
JBOD/NAS/SAN OR
Deduplication
Here
here or
Deduplication
Server-based (Source) & Integrated (Hybrid)
Advantages:
Common management
Ease of use
Can be less expensive solution (lower TCO)
Reduces network traffic
Global deduplication opportunity
Appliance-based (Target)
Advantages:
Ease of implementation
Works with variety of backup SW
Disadvantages:
Can be more expensive solution
Replication target restrictions
Greater network traffic overhead
Often on proprietary hardware