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From Vijay <vijay2...@gmail.com>
Subject Re: how does cassandra compare with mongodb?
Date Thu, 13 May 2010 17:22:41 GMT
"Cassandra requires the schema to be defined before the database starts,
MongoDB can have any schema at run-time just like a normal database."

This is changing in 0.7

Regards,
</VJ>



On Wed, May 12, 2010 at 7:25 PM, Jonathan Shook <jshook@gmail.com> wrote:

> You can choose to have keys ordered by using an
> OrderPreservingPartioner with the trade-off that key ranges can get
> denser on certain nodes than others.
>
> On Wed, May 12, 2010 at 7:48 PM, philip andrew <philip142au@gmail.com>
> wrote:
> >
> > Hi,
> > From my understanding, Cassandra entities are indexed on only one key, so
> > this can be a problem if you are searching for example by two values such
> as
> > if you are storing an entity with a x,y then wish to search for entities
> in
> > a box ie x>5 and x<10 and y>5 and y<10. MongoDB can do this, Cassandra
> > cannot due to only indexing on one key.
> > Cassandra can scale automatically just by adding nodes, almost infinite
> > storage easily, MongoDB requires database administration to add nodes,
> > setting up replication or allowing sharding, but not too complex.
> > MongoDB requires you to create sharded keys if you want to scale
> > horizontally, Cassandra just works automatically for scale horizontally.
> > Cassandra requires the schema to be defined before the database starts,
> > MongoDB can have any schema at run-time just like a normal database.
> > In the end I choose MongoDB as I require more indexes than Cassandra
> > provides, although I really like Cassandras ability to store almost
> infinite
> > amount of data just by adding nodes.
> > Thanks, Phil
> >
> > On Thu, May 13, 2010 at 5:57 AM, S Ahmed <sahmed1020@gmail.com> wrote:
> >>
> >> I tried searching mail-archive, but the search feature is a bit wacky
> (or
> >> more probably I don't know how to use it).
> >> What are the key differences between Cassandra and Mongodb?
> >> Is there a particular use case where each solution shines?
> >
>

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