News
5/28/2010
10:54 AM
George Crump
George Crump
Commentary
50%
50%

The Roll Down Hill Effect Of Primary Storage Deduplication

The adoption rate of deduplication in primary storage has been relatively low so far in primary storage. There are concerns on user's minds about performance impact, data integrity and how much capacity savings they will see. Clearly each of these concerns need to be addressed. When it comes to capacity savings though, there is a key component of capacity savings that might get overlooked, the roll down hill effect of proper primary storage deduplication.

The adoption rate of deduplication in primary storage has been relatively low so far in primary storage. There are concerns on user's minds about performance impact, data integrity and how much capacity savings they will see. Clearly each of these concerns need to be addressed. When it comes to capacity savings though, there is a key component of capacity savings that might get overlooked, the roll down hill effect of proper primary storage deduplication.Thus far the big winner in deduplication has been the backup process. If you are doing weekly full backups then there is plenty of opportunity for redundant data and you can post some incredible efficiency gains. This is not the case, or at least should not be, in primary storage. With the exception of virtualization images its unlikely that you will be able to make double digit storage efficiency gains thanks to deduplication alone. If you see typical efficiency claims of 12X in backup deduplication, expect maybe 5X gain in primary storage deduplication.

If you stop there though your missing an important part of the picture, the roll down hill effect of primary storage deduplication. If, and that is an important if, your primary storage deduplication technology can keep the data in an optimized state throughout its entire life cycle then you can see tremendous residual value in primary storage deduplication. With primary storage deduplication snapshots, replication, clones, extra copies of data (just in case copies) all now come at near zero capacity cost. For example you can perform dumps of your database every ten minutes if you want to, deduplication will curtail the capacity growth that would normally create.

The key issue is if and when primary storage deduplication will need to "re-inflate" to a non-optimized data state. Optimization throughout the data lifecycle and the tiers of storage it is on, is critical for making deduplication make sense in primary storage. In fairness there may be a time you want to re-inflate on purpose and remove dependency on the deduplication hash table. That is going to depend on how much you trust your deduplication technology to maintain its meta-data and provide rich data integrity features.

Deduplication technology tries to fix the capacity explosion problem faced by most data centers. Where deduplication is being successful right now, in backup repositories, is trying to fix that problem after it has already occurred. Primary storage deduplication that maintains data in its optimized state fixes the problem before it becomes a problem. If properly implemented primary storage deduplication could have significant reduction on the storage demands of your data center.

Track us on Twitter: http://twitter.com/storageswiss

Subscribe to our RSS feed.

George Crump is lead analyst of Storage Switzerland, an IT analyst firm focused on the storage and virtualization segments. Find Storage Switzerland's disclosure statement here.

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
karthickkandaiyah2
50%
50%
karthickkandaiyah2,
User Rank: Apprentice
12/27/2012 | 4:01:16 PM
re: The Roll Down Hill Effect Of Primary Storage Deduplication
good one
Register for Dark Reading Newsletters
White Papers
Cartoon
Current Issue
Dark Reading Tech Digest, Dec. 19, 2014
Software-defined networking can be a net plus for security. The key: Work with the network team to implement gradually, test as you go, and take the opportunity to overhaul your security strategy.
Flash Poll
10 Recommendations for Outsourcing Security
10 Recommendations for Outsourcing Security
Enterprises today have a wide range of third-party options to help improve their defenses, including MSSPs, auditing and penetration testing, and DDoS protection. But are there situations in which a service provider might actually increase risk?
Video
Slideshows
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2014-1449
Published: 2014-12-25
The Maxthon Cloud Browser application before 4.1.6.2000 for Android allows remote attackers to spoof the address bar via crafted JavaScript code that uses the history API.

CVE-2014-2217
Published: 2014-12-25
Absolute path traversal vulnerability in the RadAsyncUpload control in the RadControls in Telerik UI for ASP.NET AJAX before Q3 2012 SP2 allows remote attackers to write to arbitrary files, and consequently execute arbitrary code, via a full pathname in the UploadID metadata value.

CVE-2014-3971
Published: 2014-12-25
The CmdAuthenticate::_authenticateX509 function in db/commands/authentication_commands.cpp in mongod in MongoDB 2.6.x before 2.6.2 allows remote attackers to cause a denial of service (daemon crash) by attempting authentication with an invalid X.509 client certificate.

CVE-2014-7193
Published: 2014-12-25
The Crumb plugin before 3.0.0 for Node.js does not properly restrict token access in situations where a hapi route handler has CORS enabled, which allows remote attackers to obtain sensitive information, and potentially obtain the ability to spoof requests to non-CORS routes, via a crafted web site ...

CVE-2014-7300
Published: 2014-12-25
GNOME Shell 3.14.x before 3.14.1, when the Screen Lock feature is used, does not limit the aggregate memory consumption of all active PrtSc requests, which allows physically proximate attackers to execute arbitrary commands on an unattended workstation by making many PrtSc requests and leveraging a ...

Best of the Web
Dark Reading Radio
Archived Dark Reading Radio
Join us Wednesday, Dec. 17 at 1 p.m. Eastern Time to hear what employers are really looking for in a chief information security officer -- it may not be what you think.