What happens to data when cloud providers evaporate?

There's no way to directly migrate data between service providers

Over the past year, four cloud storage service providers have said they're shutting down and Amazon's cloud services have been problematic since Thursday.

"All of these things are coming together ... to give cloud storage providers a black eye. Anyone who was on the fence about cloud storage may be off of it by now," said Gartner research analyst Adam Couture.

More importantly, the closures and outages leave users with an important question: What happens to their data when the cloud they use evaporates?

Currently, there's no way for a cloud storage service provider to directly migrate customer data to another provider. If a service goes down, the hosting company must return the data to its customer, who then must find another provider or revert back to storing it locally, according to Arun Taneja, principal analyst at The Taneja Group.

SNIA and migration

The Storage Networking Industry Association's Technical Work Group is developing an API called the Cloud Data Management Interface that would allow providers to migrate customer data from one vendor's cloud to the next -- a move aimed at alleviating vendor lock-in.

That API, if adopted by the industry, will become more important over the next several years as nearly three out of four cloud storage companies that cropped up in recent years whither and die, according to Taneja.

"There's no way for Amazon to send your data directly to another storage service provider like Nirvanix. The transfer has to happen back to the customer," Taneja said. "And, there are no rules or regulations about [cloud storage] data deletion today."

Even if you ask a cloud vendor to delete your data, it's not necessary gone -- at least, not right away. Cloud service providers use a "garbage collection" method for deleting old data. First, data is marked for deletion. Then the actual erasure or overwrite process takes place at a later date, sometimes months later, Taneja said.

That can be of particular concern in highly regulated industries such as financial services or for legal entities such as law firms.

Storage service providers dropping

Over the past year, storage service providers have been dropping quickly.

EMC last year announced it was shutting down its Atmos Online storage service because it was competing with its own resellers. At the time, EMC offered no guarantee that its customers could retrieve their data once the service closed. On the heels of the Atmos shutdown, cloud storage provider Vaultscape also closed.

Earlier this month, Iron Mountain announced it had stopped accepting new customers for its Virtual File Store service and was planning to shut it down over the next two years.

Then, last week, it was startup Cirtas Systems' turn; it announced it was leaving the market to regroup.

According to Gartner, pure-play public cloud storage service providers have had a modest level of adoption. Now, only Nirvanix and Zetta remain as pure cloud providers of network attached storage.

It's only natural that the herd of public cloud service providers is being culled, Taneja said. "The industry is overreacting. And, it's still in that overhyped stage."

Backlash coming?

With all the recent closures, Taneja said he worries there'll be a backlash against cloud storage services, even though they can offer good value in the right circumstances.

For example, Cirtas presented its services as "tier 2" primary storage with all the trimmings of an enterprise-class product, including data snapshots, cloning, thin provisioning, and WAN optimization, Taneja said. But the service didn't scale well.

"The hype is just out of sync with the reality," he said. "I'm not saying this is not the right time to be seriously looking at [the] cloud, but people have to go in with lower expectations. They must walk before them can run."

There are companies now offering "secure data deletion" in the cloud - or what amounts to crypto-erasure. That refers to the deletion of encryption keys, so that even if the data is ever accessed it can't be read in an unencrypted form.

Hybrid options

One of the more popular services over the past year or so has been a type of hybrid storage cloud, where an appliance is placed at the customer's site, and backup data is stored there first and then replicated off to a cloud storage service provider. Examples of those are Nasuni, StorSimple and TwinStrata. Their boxes have different features, but at their most basic they store data onsite and replicate it to a major cloud storage provider such as Amazon S3, Microsoft Azure or AT&T Synaptic Storage.

Cloud storage provider Nasuni offers a NAS file server with 1TB of storage capacity that replicates compressed and deduplicated data to either AT&T's or Amazon's cloud storage service. A Nasuni customer gets an appliance onsite, and after an initial compressed backup to the cloud, the service takes ongoing data snapshots and sends them off to the online storage provider of choice. Each time data is sent over, it's encrypted and the keys are stored on customer's file server.

If the customer requests the data be deleted, the encryption keys are erased, leaving the data unreadable in the cloud.

"The file server is a gateway to the cloud," said Andres Rodriguez, CEO of Nasuni. "We're caching to the cloud. You can have 1TB of data in an appliance managing a much bigger amount of data in the cloud."

Nasuni customers can also choose a policy that allows them to retrieve deleted encryption keys, so that if they're mistakenly deleted, they're not permanently removed.

Like the latter vendors, Cirtas sold appliances for data centers that accelerated data transfers to cloud storage providers. The company had only come out of quiet mode last September and had raised $32.5 million in venture funding.

Cirtas is not the first heavily-financed storage service provider to hit difficult times. A decade ago, StorageNetworks Inc., which offered online primary storage, got more than $200 million from Dell, Compaq Computer and others in venture funding and another $243 million from an initial public offering. Three years later, it closed.

Officials at Iron Mountain, Amazon S3, and AT&T could not immediately be reached for comment.

Lucas Mearian covers storage, disaster recovery and business continuity, financial services infrastructure and health care IT for Computerworld. Follow Lucas on Twitter at @lucasmearian or subscribe to Lucas's RSS feed. His e-mail address is lmearian@computerworld.com.

Join the newsletter!


Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.

Tags cloud computinginternetstorageAmazon Web Servicesstorage networking industry association

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.
Lucas Mearian

Lucas Mearian

Computerworld (US)
Show Comments

Cool Tech

Bang and Olufsen Beosound Stage - Dolby Atmos Soundbar

Learn more >

Toys for Boys

Sony WF-1000XM3 Wireless Noise Cancelling Headphones

Learn more >

ASUS ROG, ACRONYM partner for Special Edition Zephyrus G14

Learn more >

Nakamichi Delta 100 3-Way Hi Fi Speaker System

Learn more >

Family Friendly

Mario Kart Live: Home Circuit for Nintendo Switch

Learn more >

Philips Sonicare Diamond Clean 9000 Toothbrush

Learn more >

Stocking Stuffer

SunnyBunny Snowflakes 20 LED Solar Powered Fairy String

Learn more >

Teac 7 inch Swivel Screen Portable DVD Player

Learn more >

Christmas Gift Guide

Click for more ›

Brand Post

Most Popular Reviews

Latest Articles


PCW Evaluation Team

Tom Pope

Dynabook Portégé X30L-G

Ultimately this laptop has achieved everything I would hope for in a laptop for work, while fitting that into a form factor and weight that is remarkable.

Tom Sellers


This smart laptop was enjoyable to use and great to work on – creating content was super simple.

Lolita Wang


It really doesn’t get more “gaming laptop” than this.

Jack Jeffries


As the Maserati or BMW of laptops, it would fit perfectly in the hands of a professional needing firepower under the hood, sophistication and class on the surface, and gaming prowess (sports mode if you will) in between.

Taylor Carr


The MSI PS63 is an amazing laptop and I would definitely consider buying one in the future.

Christopher Low

Brother RJ-4230B

This small mobile printer is exactly what I need for invoicing and other jobs such as sending fellow tradesman details or step-by-step instructions that I can easily print off from my phone or the Web.

Featured Content

Product Launch Showcase

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?