Feeds

TLC NAND could penetrate biz with flash-to-flash backup

Who'll lead the dash to flashedy-flash?

3 Big data security analytics techniques

VMworld Barcelona Violin co-founder and CTO Jon Bennett identified a potential enterprise role for three-level cell (TLC) flash at VMworld Barcelona today: flash-to-flash backup. TLC is currently seen as pure consumer technology.

The first TLC NAND SSD has been announced by Samsung. But TLC NAND has a short working life, with 500 - 750 phase/erase cycles, rendering it unfit for enterprise flash storage which is reckoned to need program-erase cycles of 2,500 and up at least.

Bennett suggested that TLC flash could be used for backup, not because it would shorten the backup window but because its restore time would be very fast compared to disk-based backup systems.

He thinks that enterprises backup changed data and that is around 5 to 10 per cent of system data written to backups per day. He calculates that this could equate to thirty full device writes a year and, with a 1,000 PE cycle TLC product, that would give you three to four years of working life; good enough.

Bennett reminds us the enterprises use D2D (disk-to-disk) backup systems mostly for the vastly faster restore time compared to tape.

The short working life wouldn't matter because the write rates would be low: "With just 5 to 10 per cent of system data backed up per day then TLC endurance is okay. … Backup time to TLC should be shorter, but restore rate is where it matters the most. Restore is random, unlike (backup) ingest and that's where the real benefit would come. Shrinking restore time from the hours of disk systems to minutes could have real benefits for the enterprise."

Could we see a backup TLC flash tier inside existing flash arrays? "You would have backup to flash products. If it's backup to flash in the array it's not a backup, it's in the same array – it's not protected." Basically, if the array goes down, the backup goes down with it.

Bennett said: "We may also see TLC used in a nearline storage mode." He emphasised that these are technology visions and there is no commitment by Violin Technology to use TLC flash or have TLC product on its roadmap. This is just a CTO thinking about technology.

Still, F2F, SLC and MLC flash to TLC flash backup – it has a ring to it. Maybe there's a flash-focused start-up somewhere thinking Data Domain 2 is on the way. ®

SANS - Survey on application security programs

More from The Register

next story
This time it's 'Personal': new Office 365 sub covers just two devices
Redmond also brings Office into Google's back yard
Dropbox defends fantastically badly timed Condoleezza Rice appointment
'Nothing is going to change with Dr. Rice's appointment,' file sharer promises
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
Amazon reveals its Google-killing 'R3' server instances
A mega-memory instance that never forgets
Cisco reps flog Whiptail's Invicta arrays against EMC and Pure
Storage reseller report reveals who's selling what
prev story

Whitepapers

Designing a defence for mobile apps
In this whitepaper learn the various considerations for defending mobile applications; from the mobile application architecture itself to the myriad testing technologies needed to properly assess mobile applications risk.
3 Big data security analytics techniques
Applying these Big Data security analytics techniques can help you make your business safer by detecting attacks early, before significant damage is done.
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.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
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.