From: gogala.mladen@gmail.com   
      
   On Wed, 31 Aug 2016 19:33:14 +0200, Robert Klemme wrote:   
      
   > On 31.08.2016 10:58, Andy wrote:   
   >> Mladen Gogala wrote:   
   >   
   >>> Docker containers are light-weight virtual machines which are   
   >>> allegedly much more efficient than the traditional VM's, created by   
   >>> VMWare or Hyper-   
   >>> V. I don't see Docker being present in any significant numbers in my   
   >>> client environments. Cloud service providers are still using VMWare,   
   >>> Hyper-V and they don't seem to being present in any significant   
   >>> numbers,   
   >>   
   >> I've never seen or heard of them in use for anything, let alone   
   >> production systems.   
   >   
   > We use that successfully for a cloud service that requires SDN.   
   >   
   >>  Colour me skeptical abut their (Docker) claims   
   >> of efficiency.   
   >   
   > VMWare and the likes simulate a complete machine including simulated   
   > hardware.  That is why you can run a Windows in a VM that sits on a   
   > Linux host.  Compare that to LXC and Docker where there is just one   
   > kernel and kernel features are used to restrict access, show only a part   
   > of the filesystem (chroot like), assign virtual network interfaces etc.   
   > There is much less overhead.  (And of course this comes at a price: you   
   > cannot run something inside a Docker container which requires a newer   
   > kernel than the host has.)   
      
   But you do lose portability. I very much doubt that Docker container,   
   created for the Linux kernel would work on Winduhs.   
      
   >   
   >>> I believe that any virtual machine, not only Docker, is a complete   
   >>> nonsense when it comes to RAC.   
   >>   
   >> Agreed.   
   >   
   > Apart from testing maybe.   
   >   
   >>> So, is an Oracle database in a Docket container practical or just   
   >>> another marketing fad, like agile, DevOps and BAAS (Bug as a service)?   
   >   
   >> One thing it almost certainly could be described as is 'unsupported'.   
   >   
   > Which might be just a /slight/ hindrance for productive services that   
   > host important data... ;-)   
   >   
   > Still, it is also a hype and there is no point in running berserk just   
   > because someone asks for reasons why they do that.  This is a warning   
   > sign that the decisions at that shop are made based on the wrong   
   > reasons.  Shudder.   
   >   
   > Cheers   
   >   
   > 	robert   
      
   Actually, the person who responded with the most zeal told me that I   
   should do that because Docker crossed the $1bn boundary.   
      
   https://www.youtube.com/watch?v=cKKHSAE1gIs   
      
      
      
   --   
   Mladen Gogala   
   The Oracle Whisperer   
   http://mgogala.byethost5.com   
      
   --- SoupGate-Win32 v1.05   
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