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From Alain RODRIGUEZ <>
Subject Re: Normal "OS: Disk Throughput" levels for EC2
Date Fri, 13 Sep 2013 13:26:40 GMT
You should give further information if you want an answer. What kind of
instance it is ? Instance sore / EBS / Optimized EBS ? Do you try to read /
write on this disk ? How much ? ...

With m1 xlarge we reached 40 MBps and now with a hi1.4xlarge we don't have
reach any limit yet, and we have 100+ MBps.

My guess is that either you are writing (so no disk ops, because of
memtables) or your client process data too slowly to use correctly your


2013/9/13 David Ward <>

> 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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