[ale] MySQL array based snapshot

[DJ-Pfulio]

On 11/22/2016 01:27 PM, Chris Fowler wrote:
>  
> "Turns out Hyper-V replication was using too many resources, causing the
> SAN to get upset, and the host would close random connections to the
> guest operating systems. 

I've seen similar on a KVM host, but the backup storage is USB3, so I
wouldn't compare. On that system, any USB access of any significance
destroys all I/O across the system completely - disk, USB, network - all
are effectively paused for the time the USB is used.  I've tried a few
different methods to solve it. Each has failed, though they were
specific to the same USB chips my system uses.  It is an addon card too,
not on the MB using N/S-bridge.

Oddly, a newer system with $50 CPU + $50 MB doesn't have **any** issues
dealing with USB3 traffic.  It flows and doesn't appear to impact
anything else at all. Works like we'd expect USB3 to work - have 16TB of
storage array (4x4T) connected via USB3 on that machine. Not bad for
$99, but the array is truly cheap - doesn't support SMART and if the
power goes out, it is left off until someone physically pushes the power
button.  No "last state" setting for power-up.

Wish I could just have said that hyper-v was the problem, but can't.