Much discussion in the cloud computing world has focused on a simple
question: Is a private cloud infrastructure worthy of the name? It's been
posed in many ways, with some going so far as claiming that there is no such
thing as a private cloud. Although discussions like these are all too common
in many areas, the question really amounts to little more than counting
angels dancing on pin heads. The key issue is whether private cloud-style
infrastructure can deliver real benefits like public clouds can.
First, let's set out some definitions:
The draft NIST definition, perhaps the best we have at this point, states
that "Cloud computing is a pay-per-use model for enabling available,
convenient, on-demand network access to a shared pool of configurable
computing resources (e.g., networks, servers, storage, applications,
services) that can be rapidly provisioned and rel... (more)
Early Bird Registration at Cloud Expo
Go read that headline again: W. Curtis "Mr. Backup" Preston points out on his
blog that replication is not backup, and we can't disagree.
Keeping alternative copies of data in multiple locations is a great idea,
reducing the risk of data loss and potentially enabling enhanced access, but
it's not a historical data protection (aka, backup) strategy.
Backup requires management of multiple historic copies of a data set.
Clearly, cloud storage in itself isn't backup.
Backup vs. Storage
SNIA defines "backup" thus: [Data Recovery] A collection of da... (more)
Take a look at the various data storage offerings called "cloud" and your
head will start to ache. How can so many things all bear the "cloud storage"
name and yet be so totally different? The answer is obvious to long-time
industry observers: Each provider has tailored their offering to make it
distinct in the market, and each supports different use cases
Infrastructure versus Platform
Although I am not one to tilt at windmills, especially when it comes to
arguing the "rightness" of cloud-based marketing, I sometimes do hit upon a
set of terminology that makes sense to me. Wading... (more)
Many in the IT industry seem to enjoy arguing exactly what does and does not
constitute a cloud service. As I mentioned in my post on the controversy over
private cloud services, I do not feel that these arguments are productive. We
should focus on results and business value instead of arguing about
semantics. However, the current crop of cloud storage solutions have many
important differences from traditional SAN and NAS storage, something that
seems to surprise many end users I meet. Cloud storage capacity is not your
fathers blocks and files!
Primary, Secondary, and Tiered St... (more)
As discussed last week, cloud storage solutions differ in many ways. They can
be defined by their pricing model (usage-based or capitalized), their
location (on-site or off-site), the granularity of scalability (per-file,
standard unit, or per-system), and whether or not they are multi-tenant. But
one of the less-discussed but much more technically-challenging
differentiators lies in the access method: Some cloud storage systems use a
web protocol-based API for access, while others use conventional storage
protocols like NFS or SMB. Today we will discuss the implications of which... (more)