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From Jeff Jirsa <jji...@gmail.com>
Subject Re: NVMe SSD benchmarking with Cassandra
Date Sat, 06 Jan 2018 01:47:26 GMT
Can you quantify very bad performance? 

-- 
Jeff Jirsa


> On Jan 5, 2018, at 5:41 PM, Justin Sanciangco <jsanciangco@blizzard.com> wrote:
> 
> Hello,
>  
> I am currently benchmarking NVMe SSDs with Cassandra and am getting very bad performance
when my workload exceeds the memory size. What mount settings for NVMe should be used? Right
now the SSD is formatted as XFS using noop scheduler. Are there any additional mount options
that should be used? Any specific kernel parameters that should set in order to make best
use of the PCIe NVMe SSD? Your insight would be well appreciated.
>  
> Thank you,
> Justin Sanciangco

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