incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Edward Capriolo <edlinuxg...@gmail.com>
Subject Re: Any experience of 20 node mini-itx cassandra cluster
Date Sat, 13 Apr 2013 00:05:19 GMT
Duel core not the greatest you might run into GC issues before you run out
of IO from your ssd devices. Also cassandra has other concurrency settings
that are tuned roughly around the number of processors/cores. It is not
uncommon to see 4-6 cores of cpu (600 % in top dealing with young gen
garbage managing lots of sockets whatever.


On Fri, Apr 12, 2013 at 12:02 PM, Jabbar Azam <ajazam@gmail.com> wrote:

> That's my guess. My colleague is still looking at CPU's so I'm hoping he
> can get quad core CPU's for the servers.
>
> Thanks
>
> Jabbar Azam
>
>
> On 12 April 2013 16:48, Colin Blower <cblower@barracuda.com> wrote:
>
>>  If you have not seen it already, checkout the Netflix blog post on
>> their performance testing of AWS SSD instances.
>>
>>
>> http://techblog.netflix.com/2012/07/benchmarking-high-performance-io-with.html
>>
>> My guess, based on very little experience, is that you will be CPU bound.
>>
>>
>> On 04/12/2013 03:05 AM, Jabbar Azam wrote:
>>
>>   Hello,
>>
>>  I'm going to be building a 20 node cassandra cluster in one datacentre.
>> The spec of the servers will roughly be dual core Celeron CPU, 256 GB SSD,
>> 16GB RAM and two nics.
>>
>>
>>  Has anybody done any performance testing with this setup or have any
>> gotcha's I should be aware of wrt to the hardware?
>>
>>  I do realise the CPU is fairly low computational power but I'm going to
>> assume the system is going to be IO bound hence the RAM and SSD's.
>>
>>
>>  Thanks
>>
>> Jabbar Azam
>>
>>
>>
>> --
>>  *Colin Blower*
>> *Software Engineer*
>> Barracuda Networks Inc.
>> +1 408-342-5576 (o)
>>
>
>

Mime
View raw message