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From Richard Low <r...@acunu.com>
Subject Re: Doubts related to composite type column names/values
Date Tue, 20 Dec 2011 18:39:32 GMT
On Tue, Dec 20, 2011 at 5:28 PM, Ertio Lew <ertiop93@gmail.com> wrote:
> With regard to the composite columns stuff in Cassandra, I have the
> following doubts :
>
> 1. What is the storage overhead of the composite type column names/values,

The values are the same.  For each dimension, there is 3 bytes overhead.

> 2. what exactly is the difference between the DynamicComposite and Static
> Composite ?

Static composite type has the types of each dimension specified in the
column family definition, so all names within that column family have
the same type.  Dynamic composite type lets you specify the type for
each column, so they can be different.  There is extra storage
overhead for this and care must be taken to ensure all column names
remain comparable.

-- 
Richard Low
Acunu | http://www.acunu.com | @acunu

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