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From David Ward <>
Subject Re: Normal "OS: Disk Throughput" levels for EC2
Date Fri, 13 Sep 2013 16:12:23 GMT
My apologies, information that should have been in my original email.

m1.xlarges using a single raid0 ephemeral array for both data and the
commit log.

Latest burst write was ~150GB over 3 nodes ( rf 3 so 150GB per node ) with
8GB heap but no major spikes show up on the Opscenter graph for throughput

On Fri, Sep 13, 2013 at 7:45 AM, Nate McCall <> wrote:

> This can vary pretty heavily by instance type and storage options. What
> size instances are these and how is the storage configured?
> On Fri, Sep 13, 2013 at 1:11 AM, David Ward <> wrote:
>> I noticed on EC2, the c* nodes according to OpsCenter have never gone
>> above 1.6-2.2MBps.  That seems abnormally low but I have no reference as to
>> what is "normal" for cassandra on EC2 and curious what other people have
>> seen according to OpsCenter for the "OS: Disk Throughput" metric.
>> Thanks,
>>    Dave

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