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Game changer? I need to see some evidence first on how well it performs and integrates.
What's the concern for lock-in here - how difficult with DynamoDB be to migrate away from? Amazon seems to be increasingly catching the App Engine Syndrome, though to be fair, it's been mostly network traffic-style functionality in the past.
In Composite Hash Key mode you also get limited range queries. These are supported by any DBMS that indexes its primary key via BTrees.
DynamoDB is cutting the features to the bone. This makes it easy to migrate out of DynamoDB and, at a first glance, hard to migrate into DynamoDB. Particularly hard to migrate from a RDBMS with complex schema/index/trigger support.
The beauty of it is that complex features can be built as libraries as the needs arise. The next five years look very exciting. Hats off to Amazon.
Why is there a 1MB reply limit on BatchGets and obviously no limit on Gets? Did anybody find limits on a single item?
I'm too scared of the lock in. Afaik this isn't like EC3 where you can move a VM off the EC3 stack. The data is stored in a proprietary format so once your in, you're in. Game changer? I need to see some evidence first on how well it performs and integrates.
I simply do not see how competing cloud vendors can keep up with this. Most of them are still struggling to provide anything beyond a simple API to start/stop machines.
Well, Azure has been offering a similar NoSQL service for a few years now. http://sigops.org/sosp/sosp11/current/2011-Cascais/printable...
What's the concern for lock-in here - how difficult with DynamoDB be to migrate away from? Amazon seems to be increasingly catching the App Engine Syndrome, though to be fair, it's been mostly network traffic-style functionality in the past.
There are some bugs in signing up for the service. In console, if I go to dynamoDB tab I am asked to Sign Up first. I click the sign up button and I am told "You already have access to Amazon DynamoDB". Repeat.
Here's a brief overview comparison of DynamoDB vs. BigTable: http://vschart.com/compare/dynamo-db/vs/bigtable The site is also able to compare many other different databases.
It seems as if this site is a user-edited wiki, and there are a lot of things that need to be filled in (in case anybody is up to speed on DynamoDB and wants to help). For instance, the Map/Reduce entry was still '?' when I wrote this.