You can also try http://caffinitas.org - Open Source Java object mapper for C* using Datastax's Java Driver licensed using APL2. It is intended to be a bit close to what JPA does. Although, it cannot support JPA features 1:1 since there are fundamental differences between RDBMS and NoSQL/C*. But it has other features that traditional RDBMS do not have.
CQL in general is relatively close to SQL ("CQL is SQL minus joins and
subqueries, plus collections") - with C* 2.1 you can add "plus user types"
Regarding an interview:
1. knowledge of query-driven data model
2. knowledge of C* cluster organization / how data is distributed
3. knowledge of consistency (levels)
4. knowledge of C* read and write path
Robert
Am 22.07.2014 um 21:20 schrieb jcllings <jclli...@gmail.com>:
> So It seems that:
>
> 1. There are indeed a few (3-4) mapping schemes.
> 2. CQL isn't very hard and represents a subset of (ANSI?) SQ92.
>
> Both of these are validated based on further research and list guidance.
>
> It appears that learning Cassandra from an application developers
> perspective essentially means learning what you can't do at all and
> learning what you can't do directly that you could do with an RDMBS.
> This and keys and maybe a thing or two about replication strategies and
> you should be good to go. Does this seem accurate?
>
> What kinds of things would it be good to know for an interview?
>
> Jim C.
>
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