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From "Anthony Ikeda" <Anthony.Ik...@cardlink.com.au>
Subject RE: Some questions about using Cassandra
Date Wed, 16 Jun 2010 23:20:57 GMT
Thanks Gary, I'm looking at that plug-in feature at the moment but there
seems to be very little documentation on how to use it.

 

>From the Application point of view though we are still trying to model
the process flows based on our technological approach. Mainly due to the
fact that we need real time processing at the application layer over 2
or more sites at least 1000km apart and we are finding RDBMS to be too
slow for the volumes we are trying to achieve.

 

We want to move any relational database access off the application and
have, for example, Cassandra transferring whatever information to an
underlying database/LDAP/FileSystem once we reach a final commit point -
ultimately Cassandra being a distributed database it's going to be used
more for a cache or our database. As I said this process depends on
which sync protocol we decide on (messaging, clustering, cloud, etc).

 

Anthony

 

 

From: Gary Dusbabek [mailto:gdusbabek@gmail.com] 
Sent: Thursday, 17 June 2010 2:20 AM
To: user@cassandra.apache.org
Subject: Re: Some questions about using Cassandra

 

On Tue, Jun 15, 2010 at 19:49, Anthony Ikeda
<Anthony.Ikeda@cardlink.com.au> wrote:

	Is there any concept of Listeners such that when data is added
to Cassandra we can fire off another process to do something with that
data? E.g. create a copy in a secondary database for Business
Intelligence reports? Send the data to an LDAP server?

 Typically, this is the kind of thing that gets handled at the
application level (your application).  There is a feature request for it
though.  https://issues.apache.org/jira/browse/CASSANDRA-1016

 

Gary.


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