Hi Tomasz,

I have some questions. :)

On Tue, Dec 08, 2015 at 05:14:42PM +0100, Tomasz Charewicz wrote:
> Hi,
> 
> How many CN you have?

A meager 16 to begin with, sized for ~2k VMs.

> In our environment, we have 3 nodes for cassandra with 8 cores, 64GB RAM, 
> 600GB
> HDD.

Question then:
 - How many CNs / VMs are you supporting with this config?
 - Are you running both analytics and config on this cluster?
   - If so - do you have any insight into the scaling and utilization of each?
 - And how busy are the machines currently?

BR,
Martin


> I heard that, the best choice is use SSD drive with cassandra database or use
> two arrays for it. One for data and second one for journal.
> 
> —
> BR 
> TomekC.
> 
> 
> 
>     Wiadomość napisana przez Martin Millnert <[email protected]> w dniu
>     08.12.2015, o godz. 15:39:
> 
>     Hi OpenContrailers,
> 
>     I'm curious to other people's experiences regarding VM sizing of
>     * analytics-cassandra (we deploy 5 nodes)
>     * config-cassandra (again 5 nodes)
>     * control-zookeeper (again 5 nodes)
> 
>     in terms of VCPU, RAM, disk.
>     How large do these grow in production?
> 
>     Regards,
>     Martin
> 
> 
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