[OmniOS-discuss] All SSD pool advice

[Doug Hughes]

We have a couple of machines with all SSD pool (~6-10 Samsung 850 pro is 
the current favorite). They work great for IOPS. Here's my take.
1) you don't need a dedicated zil. Just let the zpool intersperse it 
amongst the existing zpool devices. They are plenty fast enough.
2) you don't need an L2arc for the same reason. a smaller number of 
dedicated devices would likely cause more of a bottleneck than serving 
off the existing pool devices (unless you were to put it on one of those 
giant RDRAM things or similar, but that adds a lot of expense)




On 4/4/2015 3:07 PM, Chris Nagele wrote:
> We've been running a few 4U Supermicro servers using ZeusRAM for zil 
> and SSDs for L2. The main disks are regular 1TB SAS.
>
> I'm considering moving to all SSD since the pricing has dropped so 
> much. What things should I know or do when moving to all SSD pools? 
> I'm assuming I don't need L2 and that I should keep the ZeusRAM. 
> Should I only use certain types of SSDs?
>
> Thanks,
> Chris
>
>
> -- 
>
> Chris Nagele
> Co-founder,Wildbit <http://wildbit.com/>
> Beanstalk <http://beanstalkapp.com/>, Postmark 
> <http://postmarkapp.com/>, dploy.io <http://dploy.io/>
>
>
>
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