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From "Dop Sun" <su...@dopsun.com>
Subject RE: How to initialize the Cassandra
Date Thu, 06 May 2010 14:39:31 GMT
Is this feedback for my request on initializing data for Cassandra? :-)

Basically, my question is whether there is a tool, like json2sstable, which
can import some data in a format which can be easily manual created. I don't
know the experience of other people, but what I'm currently doing is writing
a small application to write the data in.

Dop

-----Original Message-----
From: Jonathan Ellis [mailto:jbellis@gmail.com] 
Sent: Thursday, May 06, 2010 10:25 PM
To: user@cassandra.apache.org
Subject: Re: How to initialize the Cassandra

The simplest way is to just use thrift batch_mutate.

If Cassandra CPU is your bottleneck then using the binary load method
from StorageProxy can help (see contrib/bmt_example).

If Casssandra disk or network is your bottleneck then binary load
won't really help.

On Thu, May 6, 2010 at 7:51 AM, Dop Sun <sunht@dopsun.com> wrote:
> Hi,
>
>
>
> I just discovered that the json file exported by sstable2json contains
more
> than the data itself, like deletedAt values.
>
>
>
> I’m thinking whether there is a tool can import some initial data?
>
>
>
> When we are doing the typical RDBMS system, this is how we are doing:
>
> 1)      Define the schema
>
> 2)      Initialize the database with initial data using Insert statements
>
> 3)      Running the application
>
>
>
> If following these steps in Cassandra:
>
> 1)      Define the schema: this is done by define the KeySpace
>
> 2)      Initialize the data with initial data:  This is currently not
there.
> We can import data exported from existing installation, but not from
nothing
>
> 3)      Running the application
>
>
>
> Thanks,
>
> Regards,
>
> Dop



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support
http://riptano.com



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