Hi everyone,
I wrote a library/extension for Cassandra 0.8 a while back, and would
like to update it to the current version now, however I can't really
find any articles on what has changed in Cassandra. I read the
changelog, but those points are too detailed, and it's hard to
determine what impac
Does CQL3 not allow dynamic columns (column names) any more?
/blog/cql3-for-cassandra-experts.
>
> --
> Sylvain
>
> On Mon, Oct 29, 2012 at 12:34 PM, Timmy Turner wrote:
>> Does CQL3 not allow dynamic columns (column names) any more?
I'm not sure whether the raid 0 gets you anything other than headaches
should one of the drives fail. You can already distribute the
individual Cassandra column families on different drives by just
setting up symlinks to the individual folders.
2012/10/30 Ran User :
> For a server with 4 drive slo
> It's now impossible (within CQL) to add new
> (non-primary-key) columns only for individual rows implicitly with
> DML-queries (insert/update)?.
>
> Is your use case covered in the article above ?
>
> Cheers
>
> -
> Aaron Morton
> Freelance Developer
>
Does the cell transposition that is necessary for CQL3 happen on the
server side after the query execution, or is it something that the
Cassandra/CQL-client does before ultimately handing over the result
set to the caller?
document in the project as the
> reason for the changes.
>
> AFAIK to be "schema free" you use the "row-column-value" model. While this
> looks like many rows it is a single store engine row.
>
> Cheers
>
> -
> Aaron Morton
> Freela
CQL3 handles columns/rows/keys differently than Cassandra itself
underneath. If you look closely you'll see that your real primary key
is in fact only a Long:
> Key Validation Class: org.apache.cassandra.db.marshal.LongType
If you want to know more about it, check these 2 articles:
http://
Using a describe columnfamilies/tables query, Cassandra only gives me
in 1.2.0-beta1 and the error mentioned in
https://issues.apache.org/jira/browse/CASSANDRA-4946 in 1.2.0-beta2,
despite there actually being columnfamilies in the currently selected/used
keyspace. Selecting/updating the columnfam
Does the official/built-in Cassandra CQL client (in 1.2) offer any built-in
option to get direct values/objects when reading a field, instead of just a
byte array?
I think an eclipse plugin would be the wrong way to go here. Most people
probably just want to browse through the columnfamilies and see whether
their queries work out or not. This functionality is imho best implemented
as some form of a light-weight editor, not a full blown IDE.
I do have somethi
ode.google.com/a/apache-extras.org/p/cassandra-jdbc/ and python
> http://code.google.com/a/apache-extras.org/p/cassandra-dbapi2/ drivers.
>
> Cheers
>
>
> -
> Aaron Morton
> Freelance Cassandra Developer
> New Zealand
>
> @aaronmorton
> http://www.the
finition:
>>
>> http://www.datastax.com/docs/1.0/references/cql/index
>>
>> (Look at the CQL Data Types section)
>>
>> ** **
>>
>> If that's not the client you are referencing, let us know which one you
>> mean:
>>
>> http://brian
Do these other clients use the thrift API internaly?
2012/11/19 John Sanda
> You might want to take look a org.apache.cassandra.transport.SimpleClient
> and org.apache.cassandra.transport.messages.ResultMessage.
>
>
> On Mon, Nov 19, 2012 at 9:48 AM, Timmy Turner wrote:
>
&
Why is this being released as a separate project, instead of being bundled
up with Cassandra? Is it not a part of Cassandra?
2012/11/19 John Sanda
> Fantastic! As for the object mapping API, has there been any
> discussion/consideration of http://www.hibernate.org/subprojects/ogm.html?
>
>
> On
@Mat Brown:
> (while still retaining compatibility with CQL2 structures).
Do you mean by exceeding what Cassandra itself provides in terms of CQL2/3
interoperability?
I'm looking into something similar currently (however in Java not in Ruby)
and would be interested in your experiences, if you fo
that's probably a lot more of an answer than you needed, but
> hopefully the context helps. Definitely interested to hear about the
> direction you take your client in as well.
>
> Finally, regarding a blog, we've got one set up, but it's not live
> yet. I'll pi
Looking through the CQL 3.1 grammar in Cassandra, I found a "':' ident"
alternative in the "value" rule (line 961).
Is this for binding named parameters in prepared statements? Is this
currently supported by any of the drivers or in Cassandra (2.1) itself?
Looking at the docs and the current Java
Looking through the CQL 3.1 grammar for Cassandra 2.1, I noticed that the
not-equals operator (!=) is in the grammar definition, but I can't seem to
find any legal way to use it.
Is != supported as part of the where clause in Cassandra? Or is it the
grammar for some other purpose?
Information on triggers seems a bit scarce so far. The blog entry on
http://www.datastax.com/dev/blog/whats-new-in-cassandra-2-0-prototype-triggers-support
mentions them as being usable for maintaining materialized views, since
they'll be handled similarly to logged/atomic batches - is that enough
Cassandra in general can't provide guarantee any ordering of the executed
queries, since nodes may fail or rejoin the in arbitrary points in time.
But why can't it provide ordering for queries run at at least the quorum
level? Given that none of the updates get lost, why would order still an
issue
Hi,
is there a history/list showing which major (as in x.y) versions of
Cassandra were released on which date?
Or is the list on Wikipedia complete? Did 2.0 come after 1.2?
Thanks!
Hi,
when building and running Cassandra 2.0.5 from the git repository, the log
is full of lines like these
00:01:42.286 [CompactionExecutor:1] DEBUG
o.a.c.d.compaction.CompactionManager - Checking system.local
When building and running 2.1.0/trunk the log settings are however fine. Is
there any
Hi,
is the DataStax "Java Driver for Apache Cassandra" (
https://github.com/datastax/java-driver) the official/recommended Java
Client to use for accessing Cassandra from Java?
Does Cassandra itself (i.e. the apache-cassandra-* jars) not contain any
CQL clients?
Thanks!
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