Service level agreement

Hybridizing DR for the Cloud: Concerns

by dave on March 2, 2009


Over at Information Playground, Steve Todd has started down the path of no return: private clouds.  (Incidentally, I find it quite ironic that private clouds are no more private than public clouds in that they’re essentially run on the same infrastructure and face the exact same challenges for security, data mobility, and perminence that the aforementioned public clouds do…but, I digress) In his posting from last week, he details some of the challenges in looking at replication to the cloud (whether public or private is a mere stroke of the pen difference).  The good news is: he’s not alone in thinking this way. The bad news: well, we’ll get to that.  Let’s begin…

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In Part 3a of the Cloud Optimized Storage Solution series, I covered the concept of data tiering within the COSS solution.  In this particular post, I’m going to start the conversation on how SLAs may tie into the overall concept of data tiering as well as infrastructure access SLAs. This particular post is more of a “working edition” than anything else, so, comments are certainly welcome and warranted. 

Service Level Agreements provide additional frameworks for data storage and access along with particular sensitivities to the methodology of access as driven by compliance.  Understandably this subject is very broad in scope so, for the purpose of clarity, focus will be given to two basic SLA metrics: data storage and data access.  These SLAs serve two purposes: to structure the type of relationship between a customer and their data within the cloud and provide a legal framework whereby customer and provider realize risks/benefits and provide remediation.

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In Parts 1 & 2 of the Cloud Optimized Storage Solutions series, we took a look at the content being storage on COSS as well as how it is stored.  In Part 3 (split into two parts), we’ll examine the concepts of Tiering and also Service Level Agreements (SLAs) and their impact on COSS.  To that end, let’s get on with the show…

Storage within the cloud is meaningless without a measurable level of performance that it can be compared against. Since there are no established benchmarks that determine performance of storage within a cloud infrastructure, it is reasonable to apply tiering metrics to storage based on content valuation and service level agreements (SLAs) and utilize this as an overarching methodology to judge COSS storage capabilities based on application set.

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An Introduction to Cloud Optimized Storage Solutions: Part 1

December 4, 2008

With the advent of Cloud Computing and the general resurgence of computing grids, data storage has been taken for granted.  The general focus has been on computational power, integration points via software (API access, for example), and code portability.  Storage, on the other hand, was considered a commodity to be taken advantage of; a simple […]

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