Databases
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Postsdbo
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    <p>You do not have to adjust schemas in document data stores, but that does not mean you do not need some sort of schema as you probably want to do something meaningful with your data. It appears you would like an ACID database. If you have relational data, and you need transactions with that data, well it sounds very much like you need a relational database. </p> <p>With "NoSQL" databases like Mongo, you are giving up ACID for features like many writable replicas, sharding, and quick accessing of document data. Sounds like you do not benefit from that so why take the tradeoff? A lot of people have been doing hybrid approaches lately with PostgreSQL by storing documents in a relational table as blobs of JSON. With this, you can have the advantage of storing your data as not strictly structured columns where it is not needed. </p> <p>So if you have multiple documents that you need to be transactional on update, you can column out the keys, and have a column "document" or something where it is simply a blob of JSON where you serialize and deserialize it. This is not criticizing Mongo or other document stores as a database but it is just not really a good choice for transactional multidocument data. MarkLogic I believe does ACID over multiple documents too.</p> <p>I think a lot of people find appeal with mongodb due to the schema-less-ness but I think in the end they get bit by trying to shoehorn a relational model into it. So as always the DB choice depends on how your data is.</p>
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    1. POIs there a reliable (single server) MongoDB alternative?
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    1. USMichael Papile
    1. USMichael Papile
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    1. COWe already considered a hybrid solution using PostgreSQL. However this doesn't allow for a completely flexible schema as MongoDB does. If we want another indexed column we still have to adjust the schema.
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    2. CONot quite. You only need to adjust the schema if you need another column. Indexes can be added and removed as required for the cost of rebuilding them. Don't be afraid to split up your index definitions into logical files for revision-control, and apply them as required (presumably with convenience scripts for clean rebuilds and CI testing)
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