Installing and running multiple instances of the same software

Karl Auer kauer at biplane.com.au
Sun Mar 13 15:44:35 UTC 2016


On Sun, 2016-03-13 at 18:21 +0300, Amer wrote:
> My concern is the network and I/O performance.

That does NOT explain why you don't want to run the two instances on
separate physical machines. This is BY FAR the fastest option.

"Premature optimisation is the root of all evil"

Try your desired setup on virtuals. You will be able to get it up and
running very quickly. Then *test* whether or not you have an actual
problem with network or I/O performance.

If there IS a problem, you will have wasted very little time, because
your configuration will be 99% portable into the containers of your
choosing OR onto physical machines.

If there is NO problem, then you have saved yourself a huge amount of
time.

There is a saying that "you cannot make a silk purse out of a sow's
ear". All virtualisation depends upon the virtual systems not actually
using the identical resources simultaneously. No matter what containers
you use, most resources of the physical host will be shared between the
instances of Vyatta, and some resources, especially CPU time and RAM,
will necessarily be consumed by the container system itself.

If this is for production use I strongly suggest you ask around in the
Vyatta community about what others are using.

Regards, K.

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Karl Auer (kauer at biplane.com.au)
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