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From samal <samalgo...@gmail.com>
Subject Re: Number of keyspaces
Date Tue, 22 May 2012 11:56:25 GMT
Not ideally, now cass has global memtable tuning. Each cf correspond to
memory  in ram. Year wise cf means it will be in read only state for next
year, memtable  will still consume ram.
On 22-May-2012 5:01 PM, "Franc Carter" <franc.carter@sirca.org.au> wrote:

> On Tue, May 22, 2012 at 9:19 PM, aaron morton <aaron@thelastpickle.com>wrote:
>
>> It's more the number of CF's than keyspaces.
>>
>
> Oh - does increasing the number of Column Families affect performance ?
>
> The design we are working on at the moment is considering using a Column
> Family per year. We were thinking this would isolate compactions to a more
> manageable size as we don't update previous years.
>
> cheers
>
>
>>
>> Cheers
>>
>>   -----------------
>> Aaron Morton
>> Freelance Developer
>> @aaronmorton
>> http://www.thelastpickle.com
>>
>> On 22/05/2012, at 6:58 PM, R. Verlangen wrote:
>>
>> Yes, it does. However there's no real answer what's the limit: it depends
>> on your hardware and cluster configuration.
>>
>> You might even want to search the archives of this mailinglist, I
>> remember this has been asked before.
>>
>> Cheers!
>>
>> 2012/5/21 Luís Ferreira <zamith.28@gmail.com>
>>
>>> Hi,
>>>
>>> Does the number of keyspaces affect the overall cassandra performance?
>>>
>>>
>>> Cumprimentos,
>>> Luís Ferreira
>>>
>>>
>>>
>>>
>>
>>
>> --
>> With kind regards,
>>
>> Robin Verlangen
>> www.robinverlangen.nl
>>
>>
>>
>
>
> --
>
> *Franc Carter* | Systems architect | Sirca Ltd
>  <marc.zianideferranti@sirca.org.au>
>
> franc.carter@sirca.org.au | www.sirca.org.au
>
> Tel: +61 2 9236 9118
>
> Level 9, 80 Clarence St, Sydney NSW 2000
>
> PO Box H58, Australia Square, Sydney NSW 1215
>
>

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