81
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....
- 68.6k
51
votes
Accepted
How do servers with redundant power supplies balance consumption?
I'm going to give an HP Proliant-specific answer here, since the OP is asking about the HP product line.
Let's use the example of an HP DL360p Gen8 (also applies to G6, G7 and Gen9 servers):
You ...
- 196k
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 ...
- 601
36
votes
Accepted
Server Room Temperature Control
The airflow in rack servers (and any rackable equipment, actually) is designed to move horizontally, so that they can be rack-mounted on top of each other without any need for wasting rack space. ...
- 69.5k
29
votes
Server Room Temperature Control
Your buddy has the wrong concrete suggestion: rack-mount electronics are designed to shed waste heat most efficiently to air flowing through them, not around them.
But, your buddy is correct that it ...
- 1,345
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 ...
- 44.8k
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 ...
- 74.1k
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.
...
- 109k
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 ...
- 196k
12
votes
How do servers with redundant power supplies balance consumption?
it depends
If you go into setup (F10) you can choose the power management mode and usually there's a few options including the active/passive options you suggest as well as a balanced mode. I buy ...
- 101k
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 ...
- 2,194
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 ...
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 ...
- 9,242
9
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 ...
- 8,500
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/
...
- 196k
7
votes
What photograph technology is appropriate for site/datacenter documentation?
Google Business View seems like the pro option ;)
Good luck.
- 196k
6
votes
Server Room Temperature Control
As noted by one of the other answers, rack servers are designed to be stacked. Your friend is (basically) incorrect in so far as spacing the servers out would not achieve much; they individually vent ...
- 2,622
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, ...
- 196k
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
- 176
5
votes
Accepted
Server utilization and how to deal with datacenter failure
For services that need to always be available, you need N+1 redundancy, where N is the number of datacenters or servers (or whatever else you lose in the proposed failure scenario) needed to handle ...
- 17.8k
5
votes
Server Room Temperature Control
Over the years I have come across many rooms like this. Until you can put in a room A/C system.. even the wall mount units work wonderful with the condenser units mounted outside the building.
...
- 167
5
votes
Server Room Temperature Control
Spacing the servers apart in the rack will only degrade cooling performance.
A typical datacenter has rows of servers facing opposite directions. This orientation is so that servers always draw cool ...
- 1,626
5
votes
How do servers with redundant power supplies balance consumption?
Every server is different. Some automatically balance between the two and some use the primary PSU exclusively until it fails and then switches to the secondary PSU. In most cases there is a bios ...
- 448
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 ...
- 5,286
4
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:
4
votes
Ideal humidity for a server room?
The American Society of Heating, Refrigeration, and Air conditioning Engineers (ASHRAE) released a whitepaper in 2011. It says:
Recommended: 5.5ºC DP to 60% RH and 15ºC DP
Allowable: 20% to 80% RH
- 160
4
votes
Server utilization and how to deal with datacenter failure
A fairly common approach is that for the production environment the hard reserved capacity is sufficient that in case of calamity the remaining datacenter(s) ought to be able to handle the full load ...
- 74.1k
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 ...
- 2,438
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, ...
- 8,130
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 ...
- 564
Only top scored, non community-wiki answers of a minimum length are eligible