is a facility used to house computer systems and associated components, such as telecommunications and storage systems

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0answers
19 views

Setting up a caching system r/w in DCs across continents

We are going to implement a caching system to make our front-end servers which are located in different data centres in Asia, America and Europe can read and write some small JSON data in the shortest ...
0
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1answer
15 views

Can CHEF have different databags in different datacenters

Chef 12 has the notion of organizations, and environments. How would you logically model different data centers? For example, if you have two data centers, with 2 environments. us-datacenter ...
2
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1answer
18 views

Apache Spark infrastructure - combining compute and storage nodes

I have an infrastructure question around Apache Spark, which I'm looking at rolling out in a greenfield project with (at most) approximately 4 TB of data used for modelling at any given time. ...
4
votes
0answers
78 views

Why would you internally use NAT? [closed]

I work at a fairly huge company as a software engineer and I would like to understand why an enterprise would internally use NAT. We have several data centers, somewhat geographically close to each ...
4
votes
2answers
344 views

What photograph technology is appropriate for site/datacenter documentation?

I manage 500+ sites and need a better visual way of documenting and walking people through a given datacenter. I'm considering taking several (hundred) pictures and stitching them together so that I ...
1
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1answer
122 views

Whitebox firewall in datacenter environment

I am looking into alternatives to commercial firewall appliances. Most of the resources available online describe home network firewalls or sub-gigabit networks. Considering than 10GbE is becoming the ...
1
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0answers
62 views

Bridging two datacenters

i need to find out what would be best way to bridge current datecenter with new DR datacenter. I have following network configuration (show in picture). http://i.imgur.com/7bohb3I.jpg So on internal ...
1
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1answer
66 views

High peak power demands in datacenter; lower costs? [closed]

Short version A UPS seems to have only two modes: Supply all power from the input feed Supply all power from the internal batteries (when the input feed is gone) Can a UPS also be used to balance ...
2
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1answer
67 views

Zero-U PDU preferred mount location

Looking for some experience from the field - The rack I manage has two zero-U vertical PDU's supplied by the datacenter. They have fitted one on each side (one on the left, one on the right). The ...
24
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3answers
4k views

How do servers with redundant power supplies balance consumption?

I have several servers from the HP DL360 line (generations 5-8). Each of these servers has two power supplies installed. The 2 power supplies in each server are fed from different circuits. My ...
4
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1answer
90 views

Monitoring Datacenter Voltage Spikes

We have reason to believe that were getting voltage spikes in our infrastructure. Demonstrated by our remote power controllers receiving over voltages on their regulator pins causing them to fail. ...
14
votes
1answer
191 views

Share /home between datacenters

I have two servers, placed at datacenters in holland and france. Both are running Debian Wheezy. I need to share /home between them, with good performance. There are 300-something users on the ...
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1answer
79 views

The Backup Paradox [closed]

I have been thinking about how large companies backup their data. I imagine that in some critical enterprises they must consider every possibility and can't afford to lose even one bit of data. Of ...
4
votes
1answer
244 views

Batch configure HP ILO from laptop

I need a method of setting over a thousand Ilo's on our HP DL360p Gen 8 servers (With hundreds more on the way!) Our environment doesn't allow for the use of any automatically assigned address such ...
3
votes
3answers
695 views

How is a private data center more secure than a public cloud?

I have customers in the financial services industry that insist that a SaaS hosted on public clouds like Amazon's are not as secure as colocation in a private data center. However, I can't find ...
-4
votes
1answer
82 views

Any app to manage a servers and remote console? [closed]

I can't find a software to manage servers, connect to remote console, reboot, power cycle, see temperatures etc, only if I enter by the management IP and one by one server. iDRAC, iLO are also part ...
0
votes
0answers
61 views

Do some network administrators assign MAC addresses with an unassigned OUI?

I am in a situation where I have observed MAC addresses on a network that do not belong to any assigned OUI range, and this is causing some issues. I suspect the cause here is a heavy use of ...
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votes
1answer
47 views

Rapid failover from one data center to another when the first goes down?

I'm building a global CDN and have a DNS service that will direct customers to the closest server. However I need rapid failover if one of the data centers e.g. Germany goes down users need to be ...
1
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1answer
328 views

Running CoreOS across multiple data centers -howto?

I'd like to use CoreOS as my base OS going forward. I run a lot of apps in multiple data centers, and I fully believe that I should containerize the lot. This has thrown up a lot of questions, ...
2
votes
1answer
57 views

Is there a better way than VPN tunnels to access local tools in remote DCs?

I have created a fancy interface which pretends to be an unified interface to access to different local tools located inside different datacenters. These tools are not accesible from the outside. To ...
5
votes
3answers
178 views

What is an acceptable secure time source in a datacentre environment?

GPS and NTP are two very typical time sources when accurate clocks are required. However, each has an important failing. NTP does not provide authentication of the time source, and so may be ...
3
votes
3answers
956 views

How many power circuits do I have in a rack?

I'm planning to get some colocation space from someone in my area, and like most companies that offer colocation, ask about power supplies (of course) in the quote form. I'll need a power of 1000W ...
0
votes
2answers
42 views

Migrating to a Data Centre

I am a software developer. My company is planning to take advantage of visualization and host its servers at a data center. I understand the difference between the cloud and self hosting at a data ...
29
votes
3answers
3k views

Illegal activities prevention system (child pornography, animal cruelty, …)

It is a very sensitive topic that requires a solution from our end. I have few servers that I rent to few people. I have all legal permissions and rights to scan over the servers. I want to prevent ...
3
votes
0answers
261 views

Datacenter Inventory Management [closed]

In our environment the following is true: Every resource (think server, switch, pdu etc) is mapped to a specific device identifier in a database The problems are: Not every device which exists in ...
1
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2answers
62 views

ip recognition is different

some months ago i bought a dedicated server from usa (http://www.dacentec.com/) datacenter. my ips are look like this : 162.248.243.blo blo blo when i check my ip in this site : ...
6
votes
3answers
1k views

Prevent being locked out when configuring SSH and iptables [duplicate]

When you are configuring iptables or SSH over SSH and the data center is thousands of kilometers away (and getting someone there to plug in a KVM is hard), what are some standard practices to prevent ...
45
votes
7answers
7k views

Why do we still use power supplies on datacenter servers?

Computers mainly need three voltages to work : +12V, +5V and +3,3V, all of them are DC. Why can't we just have a few (for redundancy) big power supply providing these three voltages to the entire ...
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votes
2answers
209 views

Upgrade existing Windows 2012 Datacenter to Windows 2012 Datacenter R2 [closed]

I am currently using Windows 2012 Datacenter and I would like to upgrade it to the Datacenter 2012 R2 version. Is the upgrade free from Microsoft? Or do I have to buy either an upgrade version or a ...
0
votes
1answer
160 views

What are the benefits of having a data center located geographically far away from your customer's office? [closed]

Was just reading through an article on data centers as linked: http://www.theage.com.au/it-pro/business-it/what-to-look-for-in-a-data-centre-20131122-hv3qj.html Appropriate quote from article below: ...
5
votes
1answer
124 views

Using more than 80% power on a circuit in a disaster scenario

We currently have two cabinets of equipment at our datacenter, and each cabinet is served by two 30A circuits. The facility is relatively new, and each circuit is (supposedly) redundant at the source. ...
2
votes
1answer
42 views

Confused about horizontal scalling

Please correct me if I am wrong but I guess handling more requests and load by adding more machines or balancing the load between multiple servers is horizontal scalling. So, if I add more servers, ...
1
vote
1answer
284 views

desperately need 110v from a 208v pdu [closed]

I'm in a bit of a pickle... We're moving a client's infrastructure to a colocation facility. We have redundant 208v/30amp PDUs. While installing today, we realized that the client had a small ...
1
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2answers
2k views

Individual licenses needed for guests on 2012 datacenter? [duplicate]

I think I may not be 100% clear on Microsoft's licensing model for Server 2012 Datacenter edition. I have read that datacenter entitles you to run unlimited VMs, but Standard only allows you to run ...
1
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0answers
198 views

How can i detect and diagnose local network problems on a multi-server environment?

I'm a software engineer who trying to detect (and solve if possible) weird local networking problems since 2 weeks on multi-server hosting environment. We bought 3 dedicated boxes with 32GB ram 8 ...
3
votes
5answers
408 views

Multiple electrical supplies in a server room

Our server room has four cabinets (not fully utilized) and is supplied by several electric circuits from two different electrical services. Some of the equipment is 208V from a 3-phase service and ...
0
votes
1answer
270 views

Changing ip address of exchange server 2007

We've been planning to move our Exchange Server 2007 organization to a new data center. We're physically moving all our servers and assigning them new IP addresses.I've done literally all procedures ...
0
votes
2answers
1k views

Move VMDK files to different datacenter [closed]

I am looking for a possible methods to migrate VMs from vSphere 4.1 to new vSphere 4.1. What is the best way to do this minimal downtime? I want to know how to migrate an virtualized active directory ...
1
vote
2answers
180 views

Any drawbacks for using same time zone configuration in Data Centers across time zones? [duplicate]

I operate almost entirely in one time zone. Supposing a Data Center in another time zone, it would make sense to configure the machines in that data center to use my time zone, and not local. Are ...
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votes
1answer
658 views

Datacentre Rack naming convention with flexibility for reassignment of server roles [closed]

We are just shifting across to a new rack and until now have used names of cartoon characters. This is not going to work anymore, and need a better naming convention. Physically i would like to name ...
0
votes
2answers
101 views

Can a datacenter read my passwords if I'm using KVM over IP? [closed]

Is it truth that datacenters can read my passwords over KVN over IP interface when I ask them to connect it and I'am forced to enter ssh pass/encryption pass (OS install,etc) ? I colocated the server ...
9
votes
4answers
831 views

Maxing out both PDUs in a rack with redundant power

If I have a rack full of servers using redundant power supplies, and I'm keeping the amps at 80% (16A of 20A), isn't this still asking for trouble in the event of a power loss on one of the circuits? ...
1
vote
2answers
554 views

How to connect a data center network to a cloud provider with VPN

We have our production environment on EC2 classic, and we have a lease on some servers in a managed hosting environment. We would like to put a portion of our backend service in the data center, but ...
6
votes
1answer
313 views

Do I have an under-voltage issue in my data room I need to address?

I recently had a UPS fail to do its job during business hours because I didn't realize it had already reached the end of its useful life. Yes, the battery was old and, yes, I should have manually ...
21
votes
4answers
1k views

What to look for in a datacentre ethernet switch

This is a Canonical Question about choosing a network switch for a datacentre When shopping for a networking switch that's going to be going into the top of a datacentre rack, what specific ...
-1
votes
2answers
74 views

Remote administration in datacenters [closed]

Given that running a data center presumably requires BIOS level access to each server, which protocols (hardware & software) are most commonly used? I understand that KVM switches are fairly ...
1
vote
3answers
118 views

Do worldwide datacenters have global/standard unique code or name?

Some datacenter providers have 3-4 letter codes for their locations. However, it seems there is not international standards for this?
0
votes
1answer
775 views

How disable notifications in Centreon through Nagios?

I would like to disable some services notifications in Centreon through Nagios web interface. Does anybody know how do that in Nagios ?
0
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2answers
575 views

It is possible to visualize the load of an APC switched PDU for a specified period of time?

There are some APC PDUs AP7953 and now we think about a solution for check the load over a period. We don't need a 100% correct Value only a trend on which hours we have more load to localize peeks in ...
5
votes
2answers
602 views

What were your server room pain points, big wins and must haves? [closed]

Like many people on here I suspect, our server room has evolved over time. At the beginning we had a single server running Microsoft Small Business Server 2000 and it sat in the corner plugged in ...