On Thu, Jun 17, 2010 at 1:20 AM, Anthony Ikeda <anthony.ik...@cardlink.com.au> wrote: > 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.
There is no documentation whatsoever. This is just a feature proposition right now (it's not included in Cassandra, at least not yet), so it's not a all encouraged to use it unless of course it's to test it and give feedback to the patch author (which I can only encourage you to do :)). But right now you'll have to do it on the application side. > 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:gdusba...@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.ik...@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. > > _____________________________________________________________________ > This e-mail has been scanned for viruses by MCI's Internet Managed > Scanning Services - powered by MessageLabs. For further information > visit http://www.mci.com > > ********************************************************************** > This e-mail message and any attachments are intended only for the use of the > addressee(s) named above and may contain information that is privileged and > confidential. If you are not the intended recipient, any display, > dissemination, distribution, or copying is strictly prohibited. If you > believe you have received this e-mail message in error, please immediately > notify the sender by replying to this e-mail message or by telephone to (02) > 9646 9222. Please delete the email and any attachments and do not retain the > email or any attachments in any form. > ********************************************************************** >
