ITProPortal has a good writeup on Amazon Glacier technology: tape? cheap disks they power down? It’s more than just a post filled with wild speculation because it includes informed reasoning on the current state of the art for each of the candidate technologies behind Glacier:
…of all the services offered by AWS, none have fuelled the same level of speculation and interest as Amazon’s Glacier. Though the service is well-known and widely-used in enterprise, no one knows exactly what’s behind it.
Amazon has retained a thick veil of secrecy around its most mysterious web service. The Seattle-based company has always kept the processes behind its services fairly quiet, but the omerta surrounding Glacier has been especially strict, leaving experts in the tech community perplexed about what Amazon could be hiding.
TL;DR: It might be old-fashioned robot tape libraries; it might be cheap disks they fill up then turn off until they need them for retrieval; it might be some clever hybrid of the two.
Read the article.
Riverbed Technology today announced it has expanded its Whitewater cloud storage appliance family with the addition of new hardware models and upgrades to its operating system. The new Riverbed Whitewater appliances and OS provide more capacity, faster ingest speeds and more replication options. These features and capabilities make the new Whitewater appliances a critical component for enterprises wishing to leverage the economical price and reliability of cloud storage options such as Amazon Glacier.
Enhancements include new Whitewater model appliances with up to triple the cache of previous models and support of up to 14.4 petabytes of logical data. The Whitewater Operating System (WWOS) 3.0 also offers new features, including pairwise replication that enable enterprises to replicate to an additional Whitewater appliance at a secondary location. In addition, enterprises can now leverage the 10 gigabit networking interface that dramatically improves ingest performance.
Customers that deploy the Whitewater 3030 model appliance can save more than $750,000 over a three year period when backing up to Amazon Glacier. With varying requirements for recovery time objectives (RTO) of certain data sets, the ability to recover certain data sets locally and immediately has also become increasingly important.
The new WWOS 3.0 offers support for pairwise replication for Whitewater appliances that allows enterprises greater flexibility to choose the appropriate recovery option to meet their RTO based on their business continuity plans. For the fastest RTO, a Whitewater appliance can recover at disk speed to a secondary site. In addition, the new OS offers a pinning feature that allows enterprises to tier and choose which backup data sets are available on the Whitewater appliance cache for immediate access, while less critical backup data sets can be recovered from the cloud.
The three new Whitewater model (730, 2030, 3030) appliances offer between 8 to 96 TB usable cache capacity. The largest model, WWA-3030, can cache up to three times the amount of data as the previous largest model (3010) and can support backup & archive datasets of up to 14.4 petabytes before it is compressed and deduplicated onto the local cache.
For faster performance, enterprises can also choose to use 10 gigabit networking interfaces to get up to 2.5 terabytes per hour ingest performance, a 40 percent increase over previous models. The 10 gigabit networking interface also enables enterprises to transfer to Amazon Glacier cloud storage leveraging Amazon Direct Connect.
CloudBerry Lab today released CloudBerry Explorer v. 3.7.2 an application that allows users to manage files in Amazon S3 and Amazon Glacier just as if they were on their local computers.
In the new release CloudBerry Explorer allows users controlling the restore cost in Amazon Glacier that is charged based on the peak usage per hour in a given month. Smart Restore functionality enables users to specify peak retrieval rate to keep the cost on the required level and to run the restore process in the background.
The new version also comes with the ability to display Amazon Glacier storage using the Folder View to make it easier for PC users to work with the storage.
Smart Restore and Folder View features are available in both versions of CloudBerry Explorer: Freeware and PRO.
Freeware version offers basic storage management capabilities such as browsing, creating, and deleting files, folders, buckets and vaults and uploading content from your PC to Amazon S3 and Amazon Glacier storage and vice versa. CloudBerry Explorer Freeware is available for download at http://www.cloudberrylab.com/free
PRO version offers some advanced features over Freeware version. It costs $39.99 per license.