[FoRK] Docker 1.0 was Re: OSX VMs/backup, Re: Dunning-Kruger effect discriminatory environs

Stephen D. Williams sdw at lig.net
Sat Jun 14 22:03:23 PDT 2014


On 6/14/14, 12:15 PM, J. Andrew Rogers wrote:
> On Jun 12, 2014, at 3:36 PM, Gregory Alan Bolcer <greg at bolcer.org> wrote:
>> It's extremely useful for some types of software.
>>
>> On 6/12/2014 5:03 AM, Stephen Williams wrote:
>>> A container isn't a VM, even though it feels like it is.  Processes are
>>> running on the host OS natively.
>
> Roughly speaking, in terms of the types of software that will run and be well-behaved:
>
> bare metal > containers > virtual machines
>
> Containers will correctly run some code / algorithms that fail under VMs, so they are useful for that. The silicon actually behaves like native silicon.
>

Besides containers contesting for resources, what are some cases where containers have limitations or work poorly compared to bare 
metal host OS instances?  Considering that most apps are compute+memory+networking+storage (probably via a database connection), 
most device driver access shouldn't be an issue.

sdw



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