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From Sylvain Lebresne <>
Subject Re: How does cassandra deal with collisions?
Date Fri, 30 Apr 2010 07:32:29 GMT
Two rows are never compared by the MD5 of their keys. The md5 of a row key is
just used to choose which nodes of the cluster are responsible for the row.

On Fri, Apr 30, 2010 at 5:37 AM, Mark Jones <> wrote:
> MD5 is not a perfect hash, it can produce collisions, how are these dealt
> with?
> Is there a size appended to them?
> If 2 keys collide, would that result in a merging of data (if the column
> names aren’t the same) or an overwrite if they were?

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