awesome! Thank you guys for the really quick answers and the links to
the presentations.
On Thu, Dec 9, 2010 at 12:06 PM, Sylvain Lebresne wrote:
>> This helps a little but unfortunately I'm still a bit fuzzy for me. So is it
>> not true that each node contains all the data in the cluster?
>
>
> This helps a little but unfortunately I'm still a bit fuzzy for me. So is it
> not true that each node contains all the data in the cluster?
Not at all. Basically each node is responsible of only a part of the data (a
range really). But for each data you can choose on how many nodes it is; this
>
> So is it not true that each node contains all the data in the cluster?
No, not in the general case, in fact rarely is it the case. Usually Rhttp://wiki.apache.org/cassandra/StorageConfiguration
On Thu, Dec 9, 2010 at 12:43 PM, Jonathan Colby wrote:
> Thanks Ran. This helps a little but unf
Thanks Ran. This helps a little but unfortunately I'm still a bit
fuzzy for me. So is it not true that each node contains all the data
in the cluster? I haven't come across any information on how clustered
data is coordinated in cassandra. how does my query get directed to
the right node?
On Th
there are two numbers to look at, N the numbers of hosts in the ring
(cluster) and R the number of replicas for each data item. R is configurable
per column family.
Typically for large clusters N >> R. For very small clusters if makes sense
for R to be close to N in which case cassandra is useful s
I have a very basic question which I have been unable to find in
online documentation on cassandra.
It seems like every node in a cassandra cluster contains all the data
ever stored in the cluster (i.e., all nodes are identical). I don't
understand how you can scale this on commodity servers with
