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From Dave Gardner <>
Subject Re: Cassandra vs MongoDB
Date Tue, 27 Jul 2010 19:42:15 GMT
There are quite a few differences. Ultimately it depends on your use
case! For example Mongo has a limit on the maximum "document" size of
4MB, whereas with Cassandra you are not really limited to the volume
of data/columns per-row (I think there maybe a limit of 2GB perhaps;
basically none)

Another point re: search volumes is that mongo has been actively
promoting over the last few months. I recently attended an excellent
conference day in London which was very cheap; tickets probably didn't
cover the costs. I guess this is part of their strategy. Eg: encourage


On Tuesday, July 27, 2010, Jonathan Shook <> wrote:
> Also, google trends is only a measure of what terms people are
> searching for. To equate this directly to growth would be misleading.
>  Tue, Jul 27, 2010 at 12:27 PM, Drew Dahlke <> wrote:
>> There's a good post on stackoverflow comparing the two
>> It seems to me that both projects have pretty vibrant communities behind them.
>> On Tue, Jul 27, 2010 at 11:14 AM, Mark <> wrote:
>>> Can someone quickly explain the differences between the two? Other than the
>>> fact that MongoDB supports ad-hoc querying I don't know whats different. It
>>> also appears (using google trends) that MongoDB seems to be growing while
>>> Cassandra is dying off. Is this the case?
>>> Thanks for the help

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