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From Terje Marthinussen <>
Subject Re: two dimensional slicing
Date Mon, 30 Jan 2012 06:19:04 GMT
On Sun, Jan 29, 2012 at 7:26 PM, aaron morton <>wrote:

> and compare them, but at this point I need to focus on one to get
> things working, so I'm trying to make a best initial guess.
> I would go for RP then, BOP may look like less work to start with but it
> *will* bite you later. If you use an increasing version number as a key you
> will get a hot spot. Get it working with RP and Standard CF's, accept the
> extra lookups, and then see if where you are performance / complexity wise.
> Cassandra can be pretty fast.

Of course, there is no guarantee that it will bite you.

Whatever data hotspot you may get may very well be minor vs. the advantage
of slicing continous blocks of data on a single server vs. random bits and
pieces all over the place.

For instance, there are many large data repositories out there
of analytic data which only have a few queries per hour. BOP will most
likely have no performance at all for many of these, indeed, it may be much
faster than the alternatives.

BOP is very useful and powerful for many things and saves a fair chunk of
development time vs. the alternatives when you can use it.

If we really want everybody to stop using it, we should change cassandra so
it by default can provide the same function in some other way without
adding days and maybe weeks of development and extra complexity to your


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