amazon-simpledb

I would like to query simpledb directly from the client using javascript. My application is read-heavy and I rather not route the request through my application server. Is it possible to perform a select request without authentication? I could set up an authentication server, but this is rather inelegant as it will just be saying yes to every read request and would introduce another bottleneck/speedbump/point of failure. Do the other cloud db solutions (microsoft, google) have this functionality? This is possible using AWS IAM ( Identity and Access Management ) and a server side " token

I know how to page forward with SimpleDB data by using NextToken. However, how exactly does one handle previous pages? I'm on .NET, but I don't think that matters. I'm more interested in the general strategy. Mike Culver's An Introduction to Amazon SimpleDB webinar mentions that breadcrumbs are used, but he doesn't implement them in the video. EDIT: The video mentions a sample project which implements backwards paging, but the video ends before the URL for the download can be displayed. The one sample project I found didn't deal with paging. When going to the next page you may be able to

I am in the early stages of design of an application that has to be highly available and scalable. I want to use an eventual consistency data model for this for a number of reasons. I know and understand why this is an unpopular architectural choice for many solutions, but it's important in my case. I am looking for real-world advice, best-practices and gotchas to look out for when dealing with distributed / document-style databases. And particularly areas around e-commerce (shopping cart style) apps that traditionally are easier to put together with a relational db. I understand using these

I'm trying to work out how to iterate though a returned SimpleXML object. I'm using a toolkit called Tarzan AWS , which connects to Amazon Web Services (SimpleDB, S3, EC2, etc). I'm specifically using SimpleDB. I can put data into the Amazon SimpleDB service, and I can get it back. I just don't know how to handle the SimpleXML object that is returned. The Tarzan AWS documentation says this: Look at the response to navigate through the headers and body of the response. Note that this is an object, not an array, and that the body is a SimpleXML object. Here's a sample of the returned SimpleXML