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From aaron morton <>
Subject Re: sensible data model ?
Date Tue, 07 Feb 2012 18:47:43 GMT
I do not think the mmap OOM is connected with the row size. 

Add some info to the other thread if you think it's relevant. 


Aaron Morton
Freelance Developer

On 7/02/2012, at 10:33 AM, Ajeet Grewal wrote:

>> It's also a good idea to partition time series data so that the rows do not
>> grow too big. You can have 2 billion columns in a row, but big rows have
>> operational down sides.
> What are the down sides here? Unfortunately I have an existing system
> which I modeled with large rows (because I use the sorted nature of
> columns to get column ranges). After the amount of data grows, I get
> "mmap failed" exceptions (See my other thread "Cassandra OOM"). I
> wonder if there is a connection.
> -- 
> Regards,
> Ajeet

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