A database in the cloud for your webapp. I see 2 choices:
- Using Amazon SimpleDB,
- Using MySQL on an Amazon Elastic Block Store (EBS).
Pros: Cheaper + full RDBMS
Cons: Not scalable at first
SimpleDB
Pros: Instant scalability
Cons: Not open source (have to stick with amazon web services) + more coding for advanced queries (simpleDB = key-value store) + possible inconsistency ?
After this simple analysis sticking with MySQL as the main DB seems a better choice, and maybe later use SimpleDB for certain tasks. Any thoughts ?
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13 comments:
MySQL is a RDBMS and SimpleDB a K-V store, compare things that you can.
Amazon SimpleDB and CouchDB on EBS and maybe better to compare.
Take a look at http://code.google.com/p/scalaris
The choice is using a RDBMS or not and they are a lot of solution to this problem.
I'm looking forward to seeing what and how you deal with that problem with your solution.
Hi Yoan ! Thanks for replying !
You're right, it's no so fair to compare them, except if you want to use MySQL as K-V store ;-) As I'm trying to do some basic social network modeling (users and their connections) it seems anyway difficult to use a K-V store for that. For a start, MySQL seems more suited for that and maybe later migrating user attributes in SimpleDB or CouchDB when scalability will be needed is interesting.
I think the important question is do you want to stick with EC2 or Are you okay with being tied down to EC2.
If you decide to switch to a different cloud or if your application takes off big time and you want to have your own hosting infrastructure, how easy (or hard) will it be for you to export your data.
I am considering the same two options and one of my concerns is the latency of simpledb. I haven't seen any through analysis, but it seems that SimpleDB is significantly slower at making updates than a local mysql instance.
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