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Message-ID: <l2hc9ae4b791004111631ica610a55jef42651645f4edc@mail.gmail.com>
Subject: Two dimensional matrices
From: Philippe <watcherfr@gmail.com>
To: user@cassandra.apache.org
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Hello,

I would like to know if the following is indeed possible with Cassandra,
from my understanding of key & column slices it is but I am just beggining
to get my head around Cassandra...


I have data that is two dimensional, time varying (think of a grid). At each
cell of this grid,I store a binary array.
My data model will be

   - single keyspace
   - key = {Y dimension}
   - super column family = {type of data represented in each cell}
   - super column  = {time = week or month}
   - column ={X dimension}
   - value = { binary}

Will I be able to retrieve all values from a rectangle from this grid in a
single call to cassandra for given SCF and SC ? Will the result associate
each value with its key and column ?
Does it matter if it's a single call performance wise ?

Thanks
Philippe

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Content-Transfer-Encoding: quoted-printable

Hello,<div><br></div><div>I would like to know if the following is indeed p=
ossible with Cassandra, from my understanding of key &amp; column slices it=
 is but I am just beggining to get my head around Cassandra...</div><div>
<br></div><div><br></div><div>I have data that is two dimensional, time var=
ying (think of a grid). At each cell of this grid,I store a binary array.</=
div><div>My data model will be</div><div><ul><li>single keyspace</li><li>
key =3D {Y dimension}</li><li>super column family =3D {type of data represe=
nted in each cell}</li><li>super column =A0=3D {time =3D week or month}</li=
><li>column =3D{X dimension}</li><li>value =3D { binary}</li></ul><div>Will=
 I be able to retrieve all values from a rectangle from this grid in a sing=
le call to cassandra for given SCF and SC ? Will the result associate each =
value with its key and column ?</div>
<div>Does it matter if it&#39;s a single call performance wise ?</div><div>=
<br></div><div>Thanks</div><div>Philippe</div></div>

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