[Info-vax] OpenVMS servers and clusters as a cloud service

[Johnny Billquist]

On 2018-01-02 15:34, Scott Dorsey wrote:
> Johnny Billquist  <bqt at softjar.se> wrote:
>>
>> What kind of nonsese is this? Google runs Linux. Do you think Google
>> only runs one app per machine??? They do not. Like I said before,
>> machine management is all automated, including scheduling jobs on
>> machines. And the system knows the load of different applications, and
>> can combine many applications on one machine, as long as there are
>> resources available.
> 
> Pretty much, yes, they only run one app per VM.  They run plenty of VMs on
> each machine, but they rely on the hypervisor for that load management
> rather than the OS.

Uh... Google does not. Believe me, I know...
You have VMs at Google, but they are not used for the production data 
centers as such, or for all the internal services. They do use 
containers, and have been doing that for many years. But containers just 
puts limitations on things such as memory use. The scheduling is done by 
the normal kernel scheduler in Linux.

VMs are used for other kind of things...

   Johnny

-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol