Willing to bet that there was slicing on both sides of that conversation
and this is what I will now refer to as the expected and resulting razor
burn.
Babak Pasdar wrote:
Thanks James,
At signup we asked for N+1 power, two circuits to different UPS units.
I think they sliced it thin by
The building itself got into the action and their goal was to make a top
notch facility focusing on central patch panel fiber cross connects.
They started with half of the 9th floor originally called MMR-2 and
continued with multiple spaces each bigger as it was quite successful.
No raised
At which point one starts looking at the risk factors, if your whole
facility is "redundant", is the power feed coming in from two
geographically diverse substations, via diverse duct banks, into diverse
entry vaults, and diverse risers?
Doesn't eliminate the possibility of the entire building
I didn't say that I have sympathy for it but that unfortunately this is
considered acceptable practice within many low-budget "hosting" companies
and probably has been for 15 years. It's a known risk when you're buying a
$50/month "server". Same general category of problem as the OVH datacenter
On 10/23/23 15:56, Eric Kuhnke wrote:
In this case their use of the incorrectly-described A/B was probably
exclusively to handle the (not extremely rare) instances of rackmount
server power supply failures, to give each 1U or 2U size machine, or
rack of blades, two live power supplies with
On Mon, Oct 23, 2023 at 3:56 PM Eric Kuhnke wrote:
> Bulk/high-volume hosting companies, dedicated server companies/small
> rack unit count colocation operate on very thin margins. Unless a
> customer is paying a LOT more per month they're not economically
> going to be connected to true diverse
Bulk/high-volume hosting companies, dedicated server companies/small rack
unit count colocation operate on very thin margins. Unless a customer is
paying a LOT more per month they're not economically going to be connected
to true diverse A/B power.
In this case their use of the
I toured The Planet years ago in Dallas and was told by the sales rep
that A+B power was two circuits from the same PDU. :)
I consider A+B power to be two distinct feeds, separate utility
entrances, separate generators, separate UPS', PDU's, etc. Past that I
consider things like firewall
is utterly irrelevant. This DC
provider is, in my opinion is very much out of step with reality if they think
this is some sort of normal practice.
-Original Message-
From: NANOG On Behalf Of Babak Pasdar
Sent: Tuesday, October 24, 2023 8:31 AM
To: James Jun
Cc: nanog@nanog.org
Subject: Re:
On Mon, Oct 23, 2023 at 7:38 AM Babak Pasdar wrote:
> A few months ago, 165 Halsey took us down for several hours. They
> claimed that a UPS failed causing this issue. Our natural reaction was
> that we have A/B redundant power so a failed UPS on the A circuit should
> not take down the cabinet.
On Mon, 23 Oct 2023, James Jun wrote:
"2N" generally means you're connected to completely different UPS
system/complex and corresponding distribution systems for each of your circuit. This is
ideal configuration for most critical loads.
If you are in a single facility, even one with 2N+2
On Mon, Oct 23, 2023 at 03:31:21PM -0400, Babak Pasdar wrote:
>
> Is the UPS the battery or the battery and controller combined?
"N+1" nominally means you're connected to the same UPS system/complex, but each
of your feed is on a different module. Your other leg will be diverse from a
failure
Thanks James,
At signup we asked for N+1 power, two circuits to different UPS units. I
think they sliced it thin by connecting us to two battery packs on the
same UPS. When the UPS controller crashed both battery packs went down.
Which now raises the question -- is it reasonable to have to
On Mon, Oct 23, 2023 at 10:38:09AM -0400, Babak Pasdar wrote:
> I wanted to get some feedback as to what is considered standard A/B
> power setup when data centers sell redundant power.?? It has always been
> my understanding that A/B power means individually unique and preferably
> alternate
165 Halsey (and most of its tenant) data centers is an older facility.
Data center practices have changed over the decades, and terminlogy wasn't
standardized until recently.
The biggest FUBAR in telco and data centers is the difference between
"redundancy" and "diversity."
Redundant
15 matches
Mail list logo
