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From aaron morton <>
Subject Re: Commit log durability per column family
Date Mon, 11 Jun 2012 09:28:12 GMT
It's not possible and it's not possible to make the change. 

A write to the same key in multiple CF's is written as a single log record. So it's not possible
for difference CF's to use different strategies.  

The closest thing is the durable_writes KS property which turns off the commit log for the

Aaron Morton
Freelance Developer

On 11/06/2012, at 7:28 AM, osishkin osishkin wrote:

> I require durability for inserts to my column families so I'm using
> batch mode to insert data.
> However, I have some column families which I use for less important
> data (indexes) which are much more write intensive.
> If I could change the commit log setting only for them to periodic
> instead of batch, it would improve performance for me, without losing
> too much guarantees.
> Is that even possible?
> I'm using Cassandra 0.7 (and yes, I know it's bad, I will upgrade soon)
> Thank you

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