incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From hajjat <haj...@purdue.edu>
Subject Re: Are Writes disk-bound rather than CPU-bound?
Date Tue, 23 Jul 2013 16:00:10 GMT
On Tue, Jul 23, 2013 at 5:05 AM, aaron morton [via
cassandra-user@incubator.apache.org] <
ml-node+s3065146n7589236h16@n2.nabble.com> 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??
>
>
>
> --
> View this message in context:
> http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Are-Writes-disk-bound-rather-than-CPU-bound-tp7589191.html
> Sent from the [hidden email]<http://user/SendEmail.jtp?type=node&node=7589236&i=1>mailing
list archive at
> Nabble.com.
>
>
>
>
> ------------------------------
>  If you reply to this email, your message will be added to the discussion
> below:
>
> http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Are-Writes-disk-bound-rather-than-CPU-bound-tp7589191p7589236.html
>  To unsubscribe from Are Writes disk-bound rather than CPU-bound?, click
> here<http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_code&node=7589191&code=aGFqamF0QHB1cmR1ZS5lZHV8NzU4OTE5MXw4NTA5MDAwMjU=>
> .
> NAML<http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/template/NamlServlet.jtp?macro=macro_viewer&id=instant_html%21nabble%3Aemail.naml&base=nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.NodeNamespace&breadcrumbs=notify_subscribers%21nabble%3Aemail.naml-instant_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml>
>



-- 
*Mohammad Hajjat*
*Ph.D. Student*
*Electrical and Computer Engineering*
*Purdue University*




--
View this message in context: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Are-Writes-disk-bound-rather-than-CPU-bound-tp7589191p7589248.html
Sent from the cassandra-user@incubator.apache.org mailing list archive at Nabble.com.
Mime
View raw message