Hi all,
I've just released the first beta version of Caffinitas Mapper.
Caffinitas Mapper is an advanced Java object mapper for Apache Cassandra NoSQL
database. It offers an annotation based declaration model with a wide range of
built-in features like JPA style inheritance with table-per-class
Hello,
Lately I collapsed several (around 1k) column families in a bunch (100) of
column families.
To keep data separated I have added an extra column (family) which is part
of the PK.
While previous approach allowed me to always have a clear picture of every
column family's size; now I have no ot
1) Use separate counter to count number of entries in each column family
but it will require you to manage the counting manually
2) SELECT DISTINCT partitionKey FROM Normally this query is optimized
and is much faster than a SELECT *. However if you have a very big number
of distinct partitio
So I'm a Java application developer and I'm trying to find entry points
for learning to work with Cassandra.
I just finished reading "Cassandra: The Definitive Guide" which seems
pretty out of date and while very informative as to the technology that
Cassandra uses, was not very helpful from the pe
I am running tests again across different number of client threads and
number of nodes but this time I tweaked some of the timeouts configured for
the nodes in the cluster. I was able to get better performance on the
nodes at 10 client threads by upping 4 timeout values in cassandra.yaml to
24
>
>
> I just finished reading "Cassandra: The Definitive Guide" which seems
> pretty out of date and while very informative as to the technology that
> Cassandra uses, was not very helpful from the perspective of an
> application developer.
>
> Very very out of date…
> Having said that, what Java
Thanks a lot ☺
But I think authorization and authentication do little help here.
Once we allow an user to read the keyspace, how can we prevent him from writing
DB
without Cassandra’s help?
Is there any way to support ‘read-only’ some keyspace in Cassandra ? e.g. set
some specific strategy?
B
Create different user and assign role and privileges. Create a user like
guest and grant select only to that user. That way user cannot modify data
in specific keyspace or column family.
http://www.datastax.com/documentation/cql/3.0/cql/cql_reference/grant_r.html
-Vivek
On Mon, Jul 21, 2014 at
> Having said that, what Java clients should I be looking at? Are there
> any reasonably mature PoJo mapping techs for Cassandra analogous to
> Hibernate?
The Java Driver offers a basic object mapper in the mapper module. If you
look for something more evolved, have a look at
http://doanduyhai.gi
