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There are a couple of concepts which need to be distinguished. One is about structure and the other about schema. Structured data is one where the application knows in advance the meaning of each byte it receives. A good example is measurements from a sensor. In contrast a Twitter stream is unstructured. Schema is about how much of the structure is ...


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Despite the mainstream of noSQL databases IMHO the decision about adopting such technology should be made according to the achievements needed according to the information stored, not only attending to the performance you currently have. This means that maybe your best option is to stick to the SQL database and improve your HW. But additionally I read ...


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I initially just wanted to point at this as a comment, but my rep is too low. So excuse me if this is not a fully fledged answer. (Anyone feel free to edit or hint in comments) Looking at the documentation at datastax it appears that data will be evently divided by nodes, depending on the "automagical" tokens. From my understanding it's simple as that a new ...


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Would I loose that data, or not ? Good question! As outlined in the DataStax documentation section on The Write Path To Compaction, you would not lose data. As you can see, when Cassandra processes a write operation, data is written to both the commit log (on-disk) and to the memtable (which you referred to). In case of a "plug out of the wall" ...



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