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Posted to dev@cassandra.apache.org by Boris Spasojevic <bo...@epfl.ch> on 2010/07/19 15:39:01 UTC
Define keyspaces in cassandra 0.7
Hi all,
Can someone post an example of how to define keyspaces in Cassandra 0.7?
My initial Cassandra node does not load the keyspaces defined at
Cassandra.yaml. Is there a way to define the keyspaces at startup or is
runtime defining an absolute must?
thanks,
BoriS
Re: Define keyspaces in cassandra 0.7
Posted by GH <ga...@gmail.com>.
Here is a snippet out of some of my test code to try, I cut out most of the
irrellevant bits, hope it works for you... (the original code worked
here.... :-)
TSocket socket = new TSocket("localhost", 9160);
TTransport transport;
transport = socket;
TBinaryProtocol binaryProtocol = new TBinaryProtocol(transport,
false, false);
Cassandra.Client thriftClient = new
Cassandra.Client(binaryProtocol);
transport.open();
Set<String> keyspaces = thriftClient.describe_keyspaces();
if (!keyspaces.contains(KEYSPACE))
{
List<CfDef> cfDefs = new ArrayList<CfDef>();
thriftClient.system_add_keyspace(new KsDef(KEYSPACE,
"org.apache.cassandra.locator.RackUnawareStrategy", 1, cfDefs));
}
thriftClient.set_keyspace(KEYSPACE);
Map<String, Map<String,String> >
cfs=thriftClient.describe_keyspace(KEYSPACE);
String columnFamily = "MyCf";
CfDef cfDef = new CfDef(KEYSPACE, columnFamily);
cfDef.column_type="Super";
cfDef.comparator_type="TimeUUIDType";
thriftClient.system_add_column_family(cfDef);
On Tue, Jul 20, 2010 at 12:48 AM, Gary Dusbabek <gd...@gmail.com> wrote:
> I just realized that I didn't answer the "how" part of your question. :)
>
> http://svn.apache.org/repos/asf/cassandra/trunk/contrib/py_stress/stress.py
> and
> http://svn.apache.org/repos/asf/cassandra/trunk/test/system/__init__.py
> both contain examples of how to use the system_* methods to manipulate
> keyspaces.
>
> Gary.
>
>
> On Mon, Jul 19, 2010 at 09:46, Gary Dusbabek <gd...@gmail.com> wrote:
> > Defining at runtime is, very intentionally, an absolute must. It
> > would have been very simple and perhaps user-friendly to add a flag
> > that loads the schema specified in yaml when cassandra starts up. I
> > decided against it when implementing the feature because I figured it
> > would have been a disservice if users were constantly over-writing
> > existing schema unintentionally.
> >
> > Gary.
> >
> >
> > On Mon, Jul 19, 2010 at 08:39, Boris Spasojevic
> > <bo...@epfl.ch> wrote:
> >> Hi all,
> >> Can someone post an example of how to define keyspaces in Cassandra 0.7?
> >> My initial Cassandra node does not load the keyspaces defined at
> >> Cassandra.yaml. Is there a way to define the keyspaces at startup or is
> >> runtime defining an absolute must?
> >>
> >> thanks,
> >> BoriS
> >>
> >>
> >
>
Re: Define keyspaces in cassandra 0.7
Posted by Gary Dusbabek <gd...@gmail.com>.
I just realized that I didn't answer the "how" part of your question. :)
http://svn.apache.org/repos/asf/cassandra/trunk/contrib/py_stress/stress.py
and http://svn.apache.org/repos/asf/cassandra/trunk/test/system/__init__.py
both contain examples of how to use the system_* methods to manipulate
keyspaces.
Gary.
On Mon, Jul 19, 2010 at 09:46, Gary Dusbabek <gd...@gmail.com> wrote:
> Defining at runtime is, very intentionally, an absolute must. It
> would have been very simple and perhaps user-friendly to add a flag
> that loads the schema specified in yaml when cassandra starts up. I
> decided against it when implementing the feature because I figured it
> would have been a disservice if users were constantly over-writing
> existing schema unintentionally.
>
> Gary.
>
>
> On Mon, Jul 19, 2010 at 08:39, Boris Spasojevic
> <bo...@epfl.ch> wrote:
>> Hi all,
>> Can someone post an example of how to define keyspaces in Cassandra 0.7?
>> My initial Cassandra node does not load the keyspaces defined at
>> Cassandra.yaml. Is there a way to define the keyspaces at startup or is
>> runtime defining an absolute must?
>>
>> thanks,
>> BoriS
>>
>>
>
Re: Define keyspaces in cassandra 0.7
Posted by Gary Dusbabek <gd...@gmail.com>.
Defining at runtime is, very intentionally, an absolute must. It
would have been very simple and perhaps user-friendly to add a flag
that loads the schema specified in yaml when cassandra starts up. I
decided against it when implementing the feature because I figured it
would have been a disservice if users were constantly over-writing
existing schema unintentionally.
Gary.
On Mon, Jul 19, 2010 at 08:39, Boris Spasojevic
<bo...@epfl.ch> wrote:
> Hi all,
> Can someone post an example of how to define keyspaces in Cassandra 0.7?
> My initial Cassandra node does not load the keyspaces defined at
> Cassandra.yaml. Is there a way to define the keyspaces at startup or is
> runtime defining an absolute must?
>
> thanks,
> BoriS
>
>
Re: Define keyspaces in cassandra 0.7
Posted by Gary Dusbabek <gd...@gmail.com>.
Defining at runtime is, very intentionally, an absolute must. It
would have been very simple and perhaps user-friendly to add a flag
that loads the schema specified in yaml when cassandra starts up. I
decided against it when implementing the feature because I figured it
would have been a disservice if users were constantly over-writing
existing schema unintentionally.
Gary.
On Mon, Jul 19, 2010 at 08:39, Boris Spasojevic
<bo...@epfl.ch> wrote:
> Hi all,
> Can someone post an example of how to define keyspaces in Cassandra 0.7?
> My initial Cassandra node does not load the keyspaces defined at
> Cassandra.yaml. Is there a way to define the keyspaces at startup or is
> runtime defining an absolute must?
>
> thanks,
> BoriS
>
>