We recently found out about an interesting, undocumented behaviour of Amazon’s Elastic Load Balancing (ELB) service – that health check pings are performed by each and every instance running your ELB service at every health check interval. Intro to ELB But first, let me fill in some background information for readers who are not familiar …
Amazon ELB – Some caveats around health check pings Read More »
I stumbled across a set of slides with a rather comprehensive overview of the different aspects of S3, worthwhile reading for anyone who works with Amazon S3 regularly. Enjoy! Masterclass Webinar: Amazon S3 from Amazon Web Services
A couple of weeks earlier, Amazon announced support for Local Secondary Indexes (LSI) for DynamoDB. You can now perform fast, efficient queries against DynamoDB tables using attributes that are not part of the existing Hash and Range key model without resorting to the use of scans. As a result to the new feature the DynamoDB …
DynamoDB.SQL 1.2.1 – now supports Local Secondary Index Read More »
Just a quick note to say that another minor update to DynamoDB.SQL has been release, you can view the release notes here. The latest update adds support for a TSQL style WITH keyword for specifying optional parameters for tweaking the query/scan operation. For queries, you can specify the NoConsistentRead and PageSize options to use …
The series so far: Hello World example Beyond Hello World Within a workflow, not all activities have to be performed sequentially. In fact, to increase throughput and/or reduce the overall time required to finish a workflow, you might want to perform several activities in parallel provided that they don’t have any inter-dependencies and can …
Introduction to AWS SimpleWorkflow Extensions Part 3 – Parallelizing activities Read More »
The series so far: 1. Hello World example 3. Parallelizing activities In this post we’re going to go beyond the previous Hello World example and show you how to use the SWF extensions library to model workflows with multiple steps and allow data to flow naturally from one step to the next. When using …
Introduction to AWS SimpleWorkflow Extensions Part 2 – Beyond Hello World Read More »
Series so far: 2. Beyond Hello World 3. Parallelizing activities In my previous post I mentioned some of the shortcomings with Amazon SimpleWorkflow (SWF) which drove me to create an extension library on top of the standard .Net SDK to make it easier to model workflows and business processes using SWF. In this series …
Introduction to AWS SimpleWorkflow Extensions Part 1 – Hello World example Read More »
Amazon SimpleWorkflow (abbreviated to SWF from here on) is a workflow service provided by Amazon which allows you to model business processes as workflows using a task based programming model. The service provides reliable task dispatch and state management so that you can focus on developing ‘workers’ to perform the tasks that are required to …
Making Amazon SimpleWorkflow simpler to work with Read More »
If you’ve been using S3 client in the AWS SDK for .Net you might have noticed that there are no methods that let you interact with the folders in a bucket. As it turns out, S3 does not support folders in the conventional sense*, everything is still a key value pair, but tools such as …
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