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From aaron morton <aa...@thelastpickle.com>
Subject Re: Getting serialized Rows from CommitLogSegment file
Date Wed, 03 Oct 2012 07:44:40 GMT
> 
> Do you know where (which e-mail thread) was it discussed? I would like to know a little
further about it.
http://www.mail-archive.com/user@cassandra.apache.org/msg25033.html


Cheers

-----------------
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com

On 3/10/2012, at 8:24 PM, Felipe Schmidt <felipefsch@gmail.com> wrote:

> Hey Ben. Yes, that's what I'm doing.
> 
> Do you know where (which e-mail thread) was it discussed? I would like to know a little
further about it.
> Anyway, if I try to use the method Schema.instance.getTables, that returns a list of
all registered tables (keyspaces) into the system, it returns null.
> Do you have some idea about why is it happening?
> 
> Thank you very much.
> 
> Regards,
> Felipe Mathias Schmidt
> (Computer Science UFRGS, RS, Brazil)
> 
> 
> 
> 
> 
> 2012/10/2 Ben Hood <0x6e6562@gmail.com>
> Filipe,
> 
> On Tue, Oct 2, 2012 at 2:56 PM, Felipe Schmidt <felipefsch@gmail.com> wrote:
> > Seems like the information was dropped or, maybe, not existent in this
> > instance of the Schema. But, as soon as I know, it's just one instance of
> > the schema in Cassandra, right?
> 
> If I understand you correctly, you are trying to process the commit
> log to get a change list?
> 
> If so, then this question has been asked and the general consensus is
> that whilst being possible, the commit log is an internal apparatus
> subject to change that is not guaranteed to give you the information
> you think you should get. Other suggested approaches include producing
> your event stream of mutations using AOP or multiplexing change events
> on the app layer as they go into Cassandra.
> 
> HTH,
> 
> Ben
> 


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