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From David Boxenhorn <da...@lookin2.com>
Subject Re: Facebook messaging and choice of HBase over Cassandra - what can we learn?
Date Sun, 21 Nov 2010 16:40:26 GMT
Eventual consistency is not good enough for instant messaging.

On Sun, Nov 21, 2010 at 6:32 PM, Simon Reavely <simon.reavely@gmail.com>wrote:

> (Posting this to both user + dev lists)
>
> I was reviewing the blog post on the facebook engineering blog from nov
> 15th
> http://www.facebook.com/note.php?note_id=454991608919#
> <http://www.facebook.com/note.php?note_id=454991608919#>
> The Underlying Technology of Messages
> by Kannan Muthukkaruppan <http://www.facebook.com/Kannan>
>
>
>
> As a cassandra user I think the key sentence for this community is:
> "We found Cassandra's eventual consistency model to be a difficult pattern
> to reconcile for our new Messages infrastructure."
>
> I think it would be useful to find out more about this statement from
> Kannan
> and the facebook team. Does anyone have any contacts in the Facebook team?
>
> My goal here is to understand usage patterns and whether or not the
> Cassandra community can learn from this decision; maybe even understand
> whether the Cassandra roadmap should be influenced by this decision to
> address a target user base. Of course we might also conclude that its just
> "not a Cassandra use-case"!
>
> Cheers,
> Simon
> --
> Simon Reavely
> simon.reavely@gmail.com
>

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