Disadvantages of using Columnar Database

Columnar databases do have their disadvantages. They are typically less efficient when it is necessary to update or delete data, for several reasons.

First and foremost, updating or deleting a single row of data requires finding several locations on disk where the individual columns are stored.

Even single row retrievals can be slower, resulting in a noticeable performance difference.

Columnar databases can also be implemented as MPP (massively parallel processing) systems, as hardware appliances or as in-memory systems.

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