Feeds

Google adds 'Differential Snapshots' to cloud storage

Limps after Amazon with cut-price backup tech

Top 5 reasons to deploy VMware with Tegile

There are only so many ways you can build a gigantic infrastructure cloud, so it is with little surprise that Google has introduced a snapshot feature already found in Amazon Web Services.

The "Differential Snapshots" feature was announced by Google in a post to the Google Compute Engine Google group on Monday, and the Chocolate Factory predicts it will cut the storage demands of backing up cloud instances hosted on Google's infrastructure-as-a-service.

The tech lets Google cloud wranglers create backups of persistent disks which contain only the data that has changed since the last snapshot.

This feature has been available in Amazon's Elastic Block Storage system for several years, though given the major outages caused by EBS problems, Google's Persistent Disks may have more inherent availability.

The "differential snapshots" mean admins can look forward to "faster snapshot times, lowered storage usage, and lower costs," Google said.

Potential uses of the technology include backing up data, recreating persistent disks that have been lost, or copying existing disks.

But things get a little complicated if admins want to delete some of their differential snapshots due to the nested, referential architecture of the system.

For instance, if I have created a snapshot of Disk A (call it snapshot 1), then create a further snapshot of that (snapshot 2), and one more that references that (snapshot 3), then deleting snapshot 2 will move blocks that were unique to it up to snapshot 3, enlarging that one's size.

Google says in its documentation that it should automatically optimise the data contents of each snapshot to avoid unnecessary duplication.

Meanwhile, Microsoft documentation indicates that the feature is unavailable for now within Windows Azure. ®

Choosing a cloud hosting partner with confidence

More from The Register

next story
Just don't blame Bono! Apple iTunes music sales PLUMMET
Cupertino revenue hit by cheapo downloads, says report
The DRUGSTORES DON'T WORK, CVS makes IT WORSE ... for Apple Pay
Goog Wallet apparently also spurned in NFC lockdown
Cray-cray Met Office spaffs £97m on VERY AVERAGE HPC box
Only 250th most powerful in the world? Bring back Michael Fish
Microsoft brings the CLOUD that GOES ON FOREVER
Sky's the limit with unrestricted space in the cloud
'ANYTHING BUT STABLE' Netflix suffers BIG Europe-wide outage
Friday night LIVE? Nope. The only thing streaming are tears down my face
IBM, backing away from hardware? NEVER!
Don't be so sure, so-surers
Google roolz! Nest buys Revolv, KILLS new sales of home hub
Take my temperature, I'm feeling a little bit dizzy
prev story

Whitepapers

Choosing cloud Backup services
Demystify how you can address your data protection needs in your small- to medium-sized business and select the best online backup service to meet your needs.
A strategic approach to identity relationship management
ForgeRock commissioned Forrester to evaluate companies’ IAM practices and requirements when it comes to customer-facing scenarios versus employee-facing ones.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?
New hybrid storage solutions
Tackling data challenges through emerging hybrid storage solutions that enable optimum database performance whilst managing costs and increasingly large data stores.
Beginner's guide to SSL certificates
De-mystify the technology involved and give you the information you need to make the best decision when considering your online security options.