Feeds

Data Domain doing faster dedupe

Doubling up and up

High performance access to file storage

Data Domain has increased the speed of its deduplication to between 50 and 100 percent through a software update.

The speed boost varies from 50 per cent on DD510, 530, and 580 models, 58 per cent on the DD565, up to 90 per cent on the DD690g and DDX array, and 100 per cent on the DD120.

The DD690g had a 1.4TB/hour throughput rating when it was introduced in May last year. Now it is 2.7TB/hour (with Symantec NetBackup OpenStorage and a 10GbitE connection).

It makes you wonder whether the code was that bad; clearly there was room for improvement. What Data Domain has done is to get its deduplication code executing better on multi-core CPUs so that more is done in parallel. The code, using a technology Data Domain calls Stream Informed Segment Layout (SISL), has been tuned so that it makes better use of the available cores.

Data Domain's platform operating software has revved from DD OS v4.5 to 4.6. Shane Jackson, senior director for product and channel marketing at Data Domain, contrasts competing vendors who, he says, rely on adding disk spindles to boost deduplication speed, with Data Domain's reliance on CPU speed. "Intel shows up with a faster processor more often than Seagate shows up with a faster drive," he says.

That's over-egging the pudding, as all dedupe vendors rely on software and disks. Data Domain happens to have, it appears, as good as if not better software algorithms than most, certainly enough for it to suggest its products can be used to deduplicate some primary storage applications.

The neat aspect of this is that it's widely expected to introduce new, Nehelem-boosted hardware later this year. With 8 cores available there should be another doubling or near-doubling of performance compared to the current quad core Xeons being used. That means a DD690-type product could ramp its performance up to 5.4TB/hour, meaning 90GB/min or 1.5GB/sec.

Sepaton and Diligent, now owned by IBM, emphasise their deduping speed and NetApp also pushes its ASIS dedupe into some primary data deduplication applications.

Two thoughts: first, it looks as if a deduping race is on. Secondly, it begins to look as if inline deduplication is quite viable for the majority of backup applications.

Offline dedupe vendors say that, to keep backup speeds high you really should land the backup data uninterrupted by any processing and dedupe it afterwards. At speeds of up to 750MB/sec now and with 1.5GB/sec speeds coming, Data Domain would say that most backup applications could be deduped inline and avoid the need for a substantial chunk of disk capacity kept aside to land the raw data. ®

High performance access to file storage

More from The Register

next story
European Court of Justice rips up Data Retention Directive
Rules 'interfering' measure to be 'invalid'
Dropbox defends fantastically badly timed Condoleezza Rice appointment
'Nothing is going to change with Dr. Rice's appointment,' file sharer promises
Cisco reps flog Whiptail's Invicta arrays against EMC and Pure
Storage reseller report reveals who's selling what
This time it's 'Personal': new Office 365 sub covers just two devices
Redmond also brings Office into Google's back yard
Bored with trading oil and gold? Why not flog some CLOUD servers?
Chicago Mercantile Exchange plans cloud spot exchange
Just what could be inside Dropbox's new 'Home For Life'?
Biz apps, messaging, photos, email, more storage – sorry, did you think there would be cake?
IT bods: How long does it take YOU to train up on new tech?
I'll leave my arrays to do the hard work, if you don't mind
prev story

Whitepapers

Securing web applications made simple and scalable
In this whitepaper learn how automated security testing can provide a simple and scalable way to protect your web applications.
Five 3D headsets to be won!
We were so impressed by the Durovis Dive headset we’ve asked the company to give some away to Reg readers.
HP ArcSight ESM solution helps Finansbank
Based on their experience using HP ArcSight Enterprise Security Manager for IT security operations, Finansbank moved to HP ArcSight ESM for fraud management.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Mobile application security study
Download this report to see the alarming realities regarding the sheer number of applications vulnerable to attack, as well as the most common and easily addressable vulnerability errors.