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From Jabbar Azam <aja...@gmail.com>
Subject Re: Any experience of 20 node mini-itx cassandra cluster
Date Sat, 13 Apr 2013 04:47:21 GMT
What about using quad core athlon x4 740 3.2 GHz with 8gb of ram and 256gb
ssds?

I know it will depend on our workload but will be better than a dual core
CPU. I think....

Jabbar Azam
On 13 Apr 2013 01:05, "Edward Capriolo" <edlinuxguru@gmail.com> wrote:

> 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)
>>>
>>
>>
>

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