why bloom filter is only for row key?

2014-09-14 Thread Philo Yang
Hi all,

After reading some docs, I find that bloom filter is built on row keys, not
on column key. Can anyone tell me what is considered for not building bloom
filter on column key? Is it a good idea to offer a table property option
between row key and primary key for what boolm filter is built on?

Thanks,
Philo Yang


Re: why bloom filter is only for row key?

2014-09-14 Thread Mark Papadakis
There was a per CF skip list and bloom filter in earlier C* releases(serialized 
right before the actual value). Haven't checked lately but I believe this is no 
longer the case, or it's configurable and by default it doesn't do it. There is 
probably a ticket on JIRA that outlines that rationale.

Sent from my iPhone

> On 14 Σεπ 2014, at 9:22 μ.μ., Philo Yang  wrote:
> 
> Hi all,
> 
> After reading some docs, I find that bloom filter is built on row keys, not
> on column key. Can anyone tell me what is considered for not building bloom
> filter on column key? Is it a good idea to offer a table property option
> between row key and primary key for what boolm filter is built on?
> 
> Thanks,
> Philo Yang