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    <blockquote> <p><strong>A1.</strong> Binary. </p> </blockquote> <p>Have you looked at <a href="http://code.google.com/p/protobuf/" rel="nofollow">Google Protobuffers</a>? this is an efficient binary formatter with cross-platform capabilities (java, c#, python, objective c, PhP. There's even a JScript implementation knocking about but I wouldnt trust it!) </p> <p>Have you looked at messaging frameworks such as AMQP? I have successfully implemented a cross-platform binary messaging system using <a href="http://www.amqp.org/" rel="nofollow">AMQP</a> as a message router, <a href="http://code.google.com/p/protobuf/" rel="nofollow">Protobuffers</a> as binary serializer and <a href="http://www.rabbitmq.com/devtools.html" rel="nofollow">Rabbit MQ</a> as C# and Java client. It was extraordinarily fast and could perform a roundtrip request/response from client to server and back (including serialization/deserialization, excluding network times) in only 0.5ms.</p> <p>The messaging stack becomes: </p> <blockquote> <p>Mobile > RabbitMQ Client > Google Protobuffers > {the internet} > RabbitMQ Server > Google Protobuffers > Webserver</p> </blockquote> <p>JSON is your next fastest serializer but nothing can compare to binary for speed and efficient use of bandwidth.</p> <blockquote> <p><strong>A2.</strong> For performance Oracle will handle the most data, SQL Server and MySql will give very good results though depending on what you intend to do. </p> </blockquote> <p>It also depends on how your data is going to be stored. Are you storing relational data? Then use a relational database. Are you storing time series data? Then use a column-ordered database or even a flat file. PyTables is an excellent example of python-based file centric database which is highly suited to storing scientific datasets and timeseries. </p> <p>The answer to this question really is "It depends" - on what you want to do. I would also consider developing in a serverside technology you know well rather than pick one based on numbers as they are all fairly similar. </p> <blockquote> <p><strong>A3.</strong> Unknown, not my area of expertise. </p> </blockquote> <p>Best regards, </p>
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    1. POMobile network perfomance: What would be the most efficient data-type to transfer data from a webserver to a mobilephone?
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    1. COI was reading about google protobuffers/rabbitmq. Looks interresting. I will have a better look at it soon and try it out.
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    2. COYes often overlooked, asynchronous messaging (like AMQP which RabbitMQ is a client/server for) is very lightweight, fast and handles high data. Technologies like this are used in trading applications to achieve low latencies. Combined with binary serialization this can be a formidable solution :)
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    3. CORight now we limit each dictionary to return a maximum of 6 results. But some user have up to 50 dictionaries and when they search 'auto' (in all 50 dictionaries/directions) then we get into trouble.
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