[ale] MySQL array based snapshot

[Phil Turmel]

On 11/22/2016 03:24 PM, DJ-Pfulio wrote:
> 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.

Ewww.  Sounds like polling I/O fallback when interrupt-driven DMA is
broken.  Anything like that show up in dmesg?

Phil