[CentOS] how to increase DNS reliability?
hw
hw at gc-24.de
Thu Jul 25 20:39:00 UTC 2019
On 7/25/19 9:39 PM, John Pierce wrote:
> On Thu, Jul 25, 2019 at 10:32 AM hw <hw at gc-24.de> wrote:
>
>> I can't help it when the primary name server goes down because the UPS
>> fails
>> the self test and tells the server it has 2 minutes or so left in wich case
>> the server figures it needs to shut down. I wanted better UPSs ...
>>
>
> critical infrastructure servers should have redudant PSUs, on seperate UPSs.
right, with hot swappable batteries ...
> my last rack builds, I had 2 Eaton PowerWare 7KVA 4U UPS's in the bottom of
> each rack. one fed the left side PDUs, the other fed the right side PDUs,
> and each server had redundant PSU's, one plugged into each PDU.
>
> those Eaton UPS's had hotswappable batteries, too.
... like this
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