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From Tamar Fraenkel <ta...@tok-media.com>
Subject Re: key sorting question
Date Wed, 07 Mar 2012 07:26:36 GMT
Thanks.

*Tamar Fraenkel *
Senior Software Engineer, TOK Media

[image: Inline image 1]

tamar@tok-media.com
Tel:   +972 2 6409736
Mob:  +972 54 8356490
Fax:   +972 2 5612956





On Wed, Mar 7, 2012 at 8:55 AM, Dave Brosius <dbrosius@mebigfatguy.com>wrote:

>  With random partitioner, the rows are sorted by the hashes of the keys,
> so for all intents and purposes, not sorted.
>
> This comment below really is talking about how columns are sorted, and yes
> when time uuids are used, they are sorted by the time component, as a time
> uuids start with the time component and then adds various randomness bits.
>
>
> On 03/07/2012 01:51 AM, Tamar Fraenkel wrote:
>
>  Hi!
> I am currently experimenting with Cassandra 1.0.7, but while reading
> http://www.datastax.com/dev/blog/schema-in-cassandra-1-1
> something caught my eye:
> "Cassandra orders version 1 UUIDs<http://en.wikipedia.org/wiki/Universally_unique_identifier#Version_1_.28MAC_address.29>
by
> their time component"
> Is this true?
> If I have for example USER_CF where key is randomly generated
> java.util.UUID (UUID.randomUUID()), will the rows be sorted by the
> generation time?
> I use random partitioner if that makes any difference.
> Thanks,
>
>
>
>  *Tamar Fraenkel *
> Senior Software Engineer, TOK Media
>
> [image: Inline image 1]
>
> tamar@tok-media.com
> Tel:   +972 2 6409736
> Mob:  +972 54 8356490
> Fax:   +972 2 5612956
>
>
>
>
>

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