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80 votes
Accepted

What are the pros and cons of having your own UPS attached to your own server hosted in a data center?

Pros: None Cons: It interrupts the flow of the Emergency Power Off (EPO) in the datacenter. If there is a life or death emergency in a datacenter, that EPO might be triggered to save someone's life....
Mark Henderson's user avatar
39 votes

What are the pros and cons of having your own UPS attached to your own server hosted in a data center?

Apart from low-probability scenarios, the single most important reason an unnecessary UPS really cheeses people off is that a year or two from now, it will start beeping. An UPS needs regular battery ...
Bass's user avatar
  • 611
23 votes

Carbon neutral data center?

Data centres do produce a lot of waste heat. It much depends on the climate zone whether this heat is any helpful elsewhere. During the winters in e.g. here in Finland it is possible to reduce the ...
Esa Jokinen's user avatar
  • 50.1k
17 votes

What are the pros and cons of having your own UPS attached to your own server hosted in a data center?

You may need to run your own UPS when your datacenter doesn't quite deserve the name and it does not provide centralised UPS for you and other customers. On the other hand, if that is the case there ...
HBruijn's user avatar
  • 80.7k
14 votes

Connecting hundreds of servers via the local network (LAN)

I understand how to connect a couple of servers to one server but how would I go about connecting hundreds of servers to a single server? I mean, I don't see enough ports to connect so many servers. ...
joeqwerty's user avatar
  • 111k
13 votes

Purpose of vent holes on the top of rackmount servers?

(Some people are hard to please...) These are likely system exhaust vents and fit into the total design of the product. Please understand that the system is designed and optimized for rack mounting ...
ewwhite's user avatar
  • 198k
11 votes
Accepted

How does a datacenter protect itself from IP change by the hosted servers?

Public cloud providers usually use some form of Port Security to protect against this. This means that only traffic with the allocated IP + MAC address pair(s) will be allowed onto the network. For ...
Joshua Griffiths's user avatar
11 votes
Accepted

VPN Server protocol or trick work in iran

So far there is a handful of VPN protocols that you can try. I'll try to summarize'em along with my observations of how easily they can be distinguished (and blocked) with or without DPI. This post is ...
drookie's user avatar
  • 8,796
10 votes

What are the pros and cons of having your own UPS attached to your own server hosted in a data center?

Don't forget the Electrical Code. Most have something like NEC 110.3b, "equipment must be used according to its labeling and instructions".* That gives the instructions the same force of law as the ...
Harper - Reinstate Monica's user avatar
9 votes

Connecting hundreds of servers via the local network (LAN)

I'm caching lots of data in memory to a local redis server. The server will need to connect to hundreds of other servers in the same data center (as they all need to access the same information hosted ...
Zac67's user avatar
  • 11.9k
8 votes

What is the correct temperature for a server room?

https://en.wikipedia.org/wiki/Data_center_environmental_control contains an interesting overview of vendor datacenter temperature recommendations:
Franck Dernoncourt's user avatar
8 votes

Carbon neutral data center?

My secondary datacenter is Switch SuperNap in Las Vegas. The datacenter owns its own solar farms in Nevada and promotes that the power source is 100% Green. See: https://www.switch.com/sustainability/ ...
ewwhite's user avatar
  • 198k
6 votes
Accepted

Replacing failed hardware in a hyper-converged cluster node

Think about the question here: Hyperconverged solutions are focused on combining virtualization compute and storage resources together. These are still built atop commodity servers (Supermicro, ...
ewwhite's user avatar
  • 198k
6 votes

Anyway to turn off the health LED on a DL360 g9?

Unfortunately there is no way to turn off the health LED. Since you are planning to run it till it dies, I can only think of the the tape idea or paint the led to green or add a green tint sticker :D
Harijith R's user avatar
6 votes
Accepted

How to build a carrier-neutral data center?

What you need is Autonomous system. This will help you route the same IPs independently of the provider. Here is the first paragraph from the link: An autonomous system (AS) is a collection of ...
Romeo Ninov's user avatar
  • 5,957
6 votes

How do data centers deal with constant disk failure?

Your math is wrong (1-0.016)^1000 is the probability that you will make it through a whole year without a single drive failure (with a pool of 1000 disks), but you don't just multiply 1 year by that ...
Rob M's user avatar
  • 1,492
5 votes

Sharing NFS datastore between data centers

We are using SMB3 share between two datacenters. It is similar to NFS, so I think you shouldn't have any issues. Our two servers based on Hyper-V, and we decided to try StarWind VSAN. We made our SMB ...
Stuka's user avatar
  • 5,865
4 votes

How to connect to a BGP network?

Answers: Yes, it's possible to connect to a BGP network with Ubuntu server. You'll need to run a special software, have a network card with at least 2 interfaces, and of course to have connection to ...
13dimitar's user avatar
  • 2,556
4 votes
Accepted

Where to get multiple Public IP addresses from?

You do not necessarily need more IPv4 addresses, you might be able to use IPv6 or NAT. However, if you determine that you do need/want more IPv4 addresses, they must be from your ISP, either your ...
RalfFriedl's user avatar
  • 3,178
4 votes

Carbon neutral data center?

No, because one particular data centre can only be part of the puzzle, never be environmentally friendly just by itself. A single location can only: optimize how much extra waste heat they produce, ...
anx's user avatar
  • 9,822
4 votes
Accepted

Rows in a rack configuration

A chassis is a computer case, typically which is populated with computer components, like a wiring harness, motherboard, disks, power supplies, etc. Although sometimes a chassis has slots for ...
user10489's user avatar
  • 614
3 votes

UPS inside server room?

No risk, but make sure the A/C got enought BTU for your servers, as such big UPS produce heat too. I did a comparaison on a normal UPS, SmartAPC 1500 vs an Eaton 40kva, and both product follow the ...
yagmoth555's user avatar
  • 17.2k
3 votes

colocation of a server

You only need one interface, put it in bridged mode and then connect the virtual interfaces of the VMs to the bridge. You need to get them from the hoster. APNIC wouldn't even talk to you. You can ...
Sven's user avatar
  • 99.6k
3 votes

Replacing failed hardware in a hyper-converged cluster node

Hot swapping components is a hardware feature, and has nothing to do with the software installed on the hardware. If your machines allow for cpu and ram hotswap then you should be able to do just that....
dyasny's user avatar
  • 19k
3 votes

Automating reboot of servers

You might want to take a look at the expect utility. It can use used to automate scripts where input is required. Personally, I'd be trying to understand why the systems crash so frequently that this ...
user9517's user avatar
  • 116k
3 votes

Is it really that easy to move this network?

First, we don't know what you're moving or what you mean by "clean". But if this is a simple website or even dynamic sites (except data-driven applications since we need to consider your database), ...
jarvis's user avatar
  • 2,006
3 votes

Does the power consumed by an air conditioner adds to the total heat generation in a server room?

Yes and no. Air conditioners obviously do generate heat from their own power usage, but the formulae to calculate how much equipment-generated heat they can deal with already take that into account — ...
Mike Scott's user avatar
  • 8,088
3 votes

Cloud regions apparently fail now and then. How resilient should one expect a cloud region to be against fire or natural disasters?

In general a region or an availability zone is a logical separation of cloud resources that is made visible to you as the end user. The theory is that the cloud provider maps their regions and AZ’s ...
Bob's user avatar
  • 6,011
2 votes

Purpose of vent holes on the top of rackmount servers?

Those holes are IMHO there to allow the air to keep venting in the event a person fills the expansion slots. Cards in expansion slots don't have vent holes so each care is removing venting real ...
Skeer's user avatar
  • 110
2 votes

What does "cross connect" means in Datacenters?

Many of these answers contain some excellent information, but several of them contain what seems to me like an element of confusion. Cross-connnects are the physical or virtual connections from one ...
Michael - sqlbot's user avatar

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