incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Yen Pai <yen....@gmail.com>
Subject Re: how does cassandra compare with mongodb?
Date Fri, 14 May 2010 21:16:12 GMT
Great thread -- thanks for pointing it out!

I was referencing consistency without considering durability but that is
probably something that should not be overlooked, or if it is, as you
suggested, be overlooked as a conscious decision to take on risk.


2010/5/14 Peter Schüller <scode@spotify.com>

> > Not sure if this was mentioned, but MongoDB is strongly consistent while
> > Cassandra is eventually consistent -- at least about a month ago when I
> > looked at it in more detail, though with vector clocks in 0.7, this may
> be
> > less of an issue.
>
> Did Mongo switch away from the "fsync() every now and then, let's hope
> broken values don't parse as bson" consistency semantics?
>
> Last time I looked mongodb, which was admittedly more than a single
> month ago, you definitely did not want it if you cared about strong
> consistency in the sense of durability:
>
> http://groups.google.com/group/mongodb-user/browse_thread/thread/460dbd49a5b6b267/daca5d5155d7e66e
>
> --
> / Peter Schuller aka scode
>

Mime
View raw message