Hmm yes actually deciding to do this during business hours does appear
to be an odd choice, even with two PSU in the server, they would be
better off doing this out of business hours I would of thought.
Regards Chad.
On 8/10/2017 2:56 PM, Nathan Brookfield wrote:
Chad,
That's all well and good but when you're paying a premium price for services of
this fashion you expect a certain level of service. There is a risk no matter
what when switching from power supplies taking extra load they would not
usually take as well as swing load issues with PDU's.
I completely agree with your sentiment but the risk is not to be ignored
especially during those times.
Kindest Regards,
Nathan Brookfield (VK2NAB)
-----Original Message-----
From: AusNOG [mailto:[email protected]] On Behalf Of Chad Kelly
Sent: Thursday, August 10, 2017 2:54 PM
To: [email protected]; [email protected]
Subject: Re: [AusNOG] NextDC Melbourne - Scheduled Power Maintenance -, 15th
August
On 8/10/2017 10:13 AM, [email protected] wrote:
From the latest update today, It appears that most of the works are
being postponed for the time being
Not all devices within racks support 2 feeds and planning is involved
with these devices, which is why it is crucial to receive accurate information
about any pending outages or upgrades to the NextDC DataCentres which affect
services.
If these services are mission critical then you really should have duel PSU
units, so that when one feed gets taken offline the equipment automatically
switches to the other feed. They won't just disconnect both feeds at once
because that would be stupid and if the entire DC was offline for too much time
then that would put the owners in a rather awkward situation legally, as after
say 8 or 10 hours of downtime it wouldn't be good for the owners lets put it
that way.
If the single PSU units are a part of a customers co-located equipment then
really your terms of service agreement should exclude liability under your
maintenance clauses.
I don't understand why anyone would be using single PSU equipment in a DC
environment now a days when you can buy refurbished servers that come with two
PSU as standard even when you buy them without raid.
Also for anything that is really really mission critical you should have it
hosted in multiple datacentres anyway so if something stupid does happen that
you can't control you at least still have services online as the load balanced
services would just switch.
Regards Chad.
--
Chad Kelly
Manager
CPK Web Services
Phone 03 5273 0246
Web www.cpkws.com.au
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--
Chad Kelly
Manager
CPK Web Services
Phone 03 5273 0246
Web www.cpkws.com.au
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