Questions tagged [datacenter]

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

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23 views

SQL Database on Azure is slow to datacenter, but fast to desktop?

We're hosting our app's development databases in Azure -- east region. From Pittsburgh, my office and home workstations interact with this database without any performance issues. Our testing web ...
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21 views

Datacentre MIgration: can we have same IPs

I am moving my datacentre from the USA to Singapore with a new vendor. Can I have the same IP address which I was using earlier because most of my applications are using IP to connect to my database ...
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Step up voltage converter in datacenter?

I am setting up a rack in the data center that only has 110V. It is redundant, so I thought I could take one from each leg and get 110V, but when I used a voltmeter last night they somehow are on the ...
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30 views

Cable Connection between Racks

Looking for cable connection between two specific racks. Between these two racks there is around 80-100cm gap where a door will be installed. The main concern is LVDS differential Links with AC & ...
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1answer
48 views

Is the temperature differential in my server room to large under heavy load

I have two temperature readings for my server room one measures the ambient temperature the other measures the exhaust for a server cluster. I have noticed recently that the difference between these ...
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1answer
55 views

Replay DHCPDECLINE to host by edit ethernet address in dhcpd

I known in dhcpd.conf, I can use following config to assigned a fixed ipv4 address to a client. host h1{ hardware ethernet 11:22:33:44:55:66; fixed-address 192.0.2.2; } range 192.0.2....
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1answer
121 views

Subnet and VLAN addressing in a Datacenter

I am trying to learn Datacenter networking and I am finding it hard to understand best practices for IP Address and VLAN assignment to servers and racks. For my question, I'll assume a typical 3 ...
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1answer
85 views

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

We have an out of warranty test machine (HP DL360 G9) that we are keeping around, but don't want to repair. The health LED is on and that leads the good datacenter folks to come in and freak out on ...
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1answer
90 views

Datacenter to Azure Migration - Am I On the Right Path?

Some quick background. We are a small company (13 employees, 6 of which or IT/developers). Everyone works remotely and there is no central office. Our datacenter is only used for development and ...
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1answer
42 views

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

I have to size up the air conditioning in my server room. I have calculated a total load of all the power consuming equipment in my server room, i.e. servers, networking devices, SAN, lighting, UPS, ...
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47 views

How to collect historical data using smartctl?

I'm trying to do some analysis on the SMART stats of disk drives. Unfortunately, I'm not collecting/storing smart stats data daily for the analysis. I will be writing some procedure to collect it from ...
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2answers
143 views

dedicated tunnel between two data center?

I sometimes hear the word about dedicated tunnel between two data centers. Say there is dedicated tunnel b/w DC1 and DC2 . DC1-> DC1 ISP -------- Internet ------ >DC2 ISP --------> DC2 My ...
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38 views

New virtual data centre design considerations

The situation is like this. The customer has 2 physical servers running 1 ESXi each, running virtual DHCP and DNS windows server on both ESXi as redundancy,he wants to add a 3rd server, and have vCSA ...
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171 views

Running HA Consul in two datacenters

One of my clients would like to run consul in two datacenters. Both datacenters Berlin and Frankfurt should result in a High Availability setup, where one datacenter can be taken offline or die ...
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20 views

Connecting to ATEN KVM-over-IP from a modern environment

We have several KN4132v and KN2140v appliances connected to multiple servers in our lab. These are multi-thousand dollar devices that I would be hard-pressed to justify throwing away. Unfortunately, ...
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1answer
734 views

How do you do a System State Restore on a Windows 2016 server located in a datacenter where you only have RDP and serial console access?

I am attempting to do a system state restore on a Windows Server 2016 box, however the server is in a data center (1&1) and I only have RDP and serial console access to it. I have the ...
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What are the pros and cons of having your own UPS attached to your own server hosted in a data center?

According to this comment by Tom O'Connor (slightly edited below): You can seriously tick off a datacentre by putting an UPS inside your own rack. What are the risks to the data center should a ...
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1answer
630 views

Where to get multiple Public IP addresses from? [closed]

I have a broadband connection that has one single Public IP address, Now I want to set up a home datacenter with OpenStack, My problem is that whenever I launch a new VPS in my master server, each ...
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1answer
71 views

Is it possible to run 2 arrays of RAID 1 on the same server (HP XW6600)

We are running our datacenter with one array of RAID 1 (with 2 x 2TB) on a HP XW6600 (CentOS 7). We'd like to increase disk space and avoid as much as possible downtime while upgrading. There are ...
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2answers
75 views

Does data center hosting servers have firewall in their routers?

When I setup some application in my home environment, to access that application from outside over internet I need to open ports in my router. So if I host an application in a rented Data center, does ...
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1answer
478 views

UPS inside server room?

In my company we are considering to move our servers (some are mounted on 25U rack and some are tower servers) to a newly created room (underground, no windows) that contains 40 KVa UPS and redundant ...
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0answers
915 views

Can Azure data centers be considered complaint with Uptime Institute's Tier 3 Classification requirements?

Uptime Institute certifies data center designs, facilities, and operations to the Tier Classification System (I-IV) and Operational Sustainability criteria. Can Azure data centers be considered ...
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2answers
677 views

RHEL7: virt-who reports all machines as localhost.localdomain on Customer Portal

I have an ESXi 6.0 hypervisor and am in the process of installing datacenter licenses for RedHat. I installed and configured virt-who RHEL7 VM as per How to use "virt-who" to register Esxi hosts with "...
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1answer
46 views

Rack Power Draw Reliability

I am responsible for several racks worth of gear, and as part of a datacenter efficiency project, I need to move some gear around. One constraint I'm running into juggling these servers around is ...
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1answer
16 views

Assuring two instances of the same frame wont get on to the Internet

I am new to networking and I'm trying to learn some data center architecture, but theres one thing i don't understand. If you have a redundant switch and router setup, with active active. Like this: ...
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3answers
79 views

Co-location: How to be sure the DC does not replace my server [closed]

I'm planning to purchase an expensive server and send it to a datacenter to co-locate. As this is my first server, there is a question in my mind and would be appreciated if you answer it. How could I ...
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1answer
234 views

How is air-flow designed in closed racks?

I have seen (older) racks which are fully-closed. For example similar with plexiglass doors: Or with metal doors without any grid/holes. Are such racks designed for data-centers with raised floors ...
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38 views

Can you run an sdn across datacenters?

This is entirely for R&D purposes, not actual production use, for now. But can you run an sdn, say an overlay network for example, across datacenters? I.E. would I be able to run flannel on a ...
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1answer
45 views

colocation of a server

Hi I currently host my site we a hosting provider and that is going well, however they have just been sold and I want to use a server (either Poweredge 6850 or Poweredge 2950) which will be put inside ...
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1answer
1k views

How to connect to a BGP network? [closed]

A service provider we're working with delivers us data via two(for resiliency) 1Gbps cross connects. He's located in a datacenter nearby the datacenter where our server is located. We don't have a ...
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1answer
56 views

Automating reboot of servers

We have 1,000 servers having different manufacturer and a mix of Solaris and Linux. They go down frequently and we end up rebooting by logging in to the Integrated Lights Out Manager (ILOM). I want ...
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55 views

Going the colocation route - Thoughts or suggestions on plan?

We currently host around 200 customers website with cpanel at a datacenter we rent dedicated servers from. We also host two sites that do around 5 to 6m unique a day, which is distributed across 3 ...
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219 views

Blade Server Networking Connectivity Solution

We are looking at purchasing 4 of the Dell M1000e Blade Chassis', along with 16x Half Height Servers in each. For our LAN Connection, we are looking at 2x MXL 10/40 GbE IO's per Chassis. From my ...
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3answers
715 views

Sharing NFS datastore between data centers

I have no long experience with vmware-vsphere 5.5 .. so i have simple question Is it possible to share NFS datastore across tow data centers? if yes ; is it good thing to do?
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2answers
418 views

Estimate power and cooling for server room

We are trying to determine the right power and cooling for a new server room which would be about 350 sq ft., our power is 220V. We are initially only planning to start with a single rack with ...
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2answers
46 views

Multiple static ip plus single lan subnet

So I will be taking my single server (one external ip address) and splitting it into 3 different servers (live, testing, nfs-share storage) at a new datacenter. I don't really know how i can set up ...
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1answer
43 views

Putting WD Datacenter drives in a NAS [closed]

I want to put a RAID10 array of 4x5TB WD Datacenter drives in a server. What happens if I don't want to use the server anymore and I want to use those drives in a NAS instead? Does it have to be a NAS ...
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2answers
45 views

Mounting equipment that only occupies half the depth of the cabinet?

I'm a bit naïve at all of this (sorry!), but I have to install a bunch of equipment in our co-location facility. We have a switch that only occupies half the "depth" of the cabinet. How do I mount ...
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2answers
401 views

Replacing failed hardware in a hyper-converged cluster node [closed]

Is it possible to replace failed physical components (such as disk, RAM, or power supply) in a hyper-converged node (such as VXrail or Nutanix) without taking the node offline?
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1answer
120 views

ElasticSearch enforce master shard allocation & Improve cross DC write speed

I currently run three Elasticsearch nodes. Each one in a different data center (EU, US, AP) as an AWS EC2 instance. There are 2 replicas per each shard for each index. Writes go only to the EU node. ...
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16 views

Detect changes of VM parameters

We run VMs in remote data centers. We are responsible for the VM, but not for the hypervisor. We want to detect changes in the resources of the VM. Example: VM has 10GByte memory - everything is ...
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1answer
36 views

Can data center remote hands service install new network card?

Long story short: I'm co-locating a standard server box in a data center in a faraway foreign country. I need to install a specialized network card that isn't sold or included by the OEM. I'd like to ...
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3answers
175 views

How to connect a Juniper EX4500 to netapp X1107A

What is the best and not expensive way to connect a Juniper EX4500 to a X1107A Chelsio PCI Netapp card? Will these do (10GBASE-SR) for both end? and then connect with fiber cable? How important is it ...
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2answers
85 views

Is it really that easy to move this network?

I am just wondering if maybe I am over simplifying things here. I have a network housed in one data center in Seattle. We will be moving out of that data center this weekend. For the sake of keeping ...
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2answers
107 views

Fallback between datacenters

What is the best way to do a fallback between datacenters. We have a dedicated server in one of the data centers and as our traffic increased i wanted to add more then backup i wanted redundancy and ...
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0answers
68 views

How do I use Client9's IPCat with IPTables

I'd like to block all ips of all datacenters in the world with this list: https://github.com/client9/ipcat But I don't know how to use that list, I'd like a bash script that checks if there's an ...
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3answers
1k views

Purpose of vent holes on the top of rackmount servers?

Edit: Because of the high number of downvotes on this question, I would appreciate if you could comment on why you think the question deserves so. I believe the question is clearly asking for the ...
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1answer
23 views

Methods for monitoring and alerting data issues when dealing with complex dependencies

In this hypothetical example, we have a data flow across multiple engineering teams in an ecommerce company. These teams deliver services, produce data, and consume data at different points of the ...
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1answer
1k views

Does an Intel server with RMM4 (IPMI BMC) need two IP addresses/cables?

I am managing a co-located server which has been rebooted and has not turned back on. It is in a data center and difficult to access, as such I am looking at Intel's RMM4 (compatible with the server ...
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2answers
2k views

Switch in front of router - multiple public IPs

Network Gurus, This seems logical and doable but want to have an advice from experts. We have /26 on single drop in our datacenter. Some of our application servers (A) need public IP addresses and ...

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