Imposing ZFS latency limits

[Mark Felder]

On Tue, 23 Oct 2012 10:40:16 -0500, Dustin Wenz <dustinwenz at ebureau.com>  
wrote:

> What hypervisor are you using? Is it with a passive JBOD?

VMWare ESXi and Xen accessing ZVOLs on FreeBSD shared via iSCSI (istgt).  
Yes, it's with a passive JBOD. The paths from the hypervisors to the HP  
DL380 head units to the JBODs are redundant all the way down to the disks.  
The SSDs for cache/log exist in the head units to not waste precious space  
in the JBOD chassis.

ZFS basically has full control over everything those disks do.