[CentOS] CentOS 7 and Areca ARC-1883I SAS controller: JBOD or not to JBOD?

Sat Jan 21 00:03:43 UTC 2017
Gordon Messmer <gordon.messmer at gmail.com>

On 01/20/2017 09:31 AM, Peter Peltonen wrote:
> I am planning to have RAID1 setup and I am wondering if I should use
> the controller's RAID functionality which has 2GB cache or should I go
> with JBOD + Linux software RAID?

I'd recommend testing the specific application that will run on this 
system.  It's not unusual for a system to preform well in simplistic 
benchmarks (like bonnie++), but not in real-world use. I recently 
conducted tests in which a MegaRAID controller handily outclassed 
software RAID under bonnie++, but fell short under better benchmarks 
provided by filebench: