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From Alex Popescu <al...@datastax.com>
Subject Re: Are Writes disk-bound rather than CPU-bound?
Date Tue, 23 Jul 2013 18:07:41 GMT
I see pretty much the same formulation in the 1.2 docs, so I'm wondering
what would be the best rewrite of that paragraph?


On Tue, Jul 23, 2013 at 9:00 AM, hajjat <hajjat@purdue.edu> wrote:

>
>
> On Tue, Jul 23, 2013 at 5:05 AM, aaron morton [via [hidden email]<http://user/SendEmail.jtp?type=node&node=7589248&i=0>]
> <[hidden email] <http://user/SendEmail.jtp?type=node&node=7589248&i=1>>wrote:
>
>> “/Insert-heavy workloads will actually be CPU-bound in Cassandra before
>> being
>> memory-bound/”
>>
>> What is the source for that ?
>
>
> http://www.datastax.com/docs/0.8/cluster_architecture/cluster_planning
> ​​
>
>>
>> This is because everything is
>> *first *written to the commit log *on disk*. Any thoughts??
>>
>> Pretty much.
>>
>> Cheers
>>
>>    -----------------
>> Aaron Morton
>> Cassandra Consultant
>> New Zealand
>>
>> @aaronmorton
>> http://www.thelastpickle.com
>>
>> On 22/07/2013, at 8:58 AM, hajjat <[hidden email]<http://user/SendEmail.jtp?type=node&node=7589236&i=0>>
>> wrote:
>>
>> “/Insert-heavy workloads will actually be CPU-bound in Cassandra before
>> being
>> memory-bound/”
>>
>> However, from reading the documentation
>> (http://www.datastax.com/docs/1.2/dml/about_writes) it seems the disk is
>> the
>> real bottleneck in Writes rather than the CPU. This is because everything
>> is
>> *first *written to the commit log *on disk*. Any thoughts??
>>
>>
>>
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>
>
> --
> *Mohammad Hajjat*
> *Ph.D. Student*
> *Electrical and Computer Engineering*
> *Purdue University*
>
> ------------------------------
> View this message in context: Re: Are Writes disk-bound rather than
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-- 

:- a)


Alex Popescu
@al3xandru

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