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Questions tagged [datacenter]

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

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0answers
26 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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0answers
16 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
32 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 ...
48
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6answers
8k views

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
44 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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0answers
245 views

Slow docker overlay network between physical sites

Running a docker swarm on the same subnet interconnected on two physical networks via a fibre link. One of them is 10Gbps, and the other 1Gbps. As so: -------------------------------- | | Site A, ...
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0answers
48 views

Physical setup of redundant servers

We are setting up servers and are limited to one rack. What is the best way to physically set them up. All boxes are in an HA environment except for the voices boxes where are N+1 There seems to be ...
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1answer
51 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
51 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 ...
3
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1answer
290 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 ...
1
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0answers
541 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
457 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 "...
2
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1answer
38 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 ...
0
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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
74 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 ...
1
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1answer
166 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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0answers
31 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
758 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
51 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 ...
0
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0answers
52 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 ...
2
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0answers
192 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 ...
4
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3answers
563 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
220 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
39 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
41 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
42 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 ...
2
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2answers
311 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
101 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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0answers
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 ...
0
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1answer
32 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
153 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
85 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
59 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 ...
3
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3answers
889 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 ...
1
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1answer
20 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 ...
1
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1answer
867 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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0answers
172 views

SYBASE Connection slow to data center

My team and I are in the midst of migrating some of our servers to a new data center (we are connected via MPLS). I'm testing the first of our dev servers and am running into an issue. This server (...
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2answers
1k 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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1answer
115 views

How long a latest rack server in data center takes to boot? [closed]

For an short/simple experiments, I need to know how long a latest rack server Xen/Vmware hypervisor installed with its utilities takes time to boot up (cold boot)? In our lab we do not have rack ...
1
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1answer
88 views

HDD seq. read performance

I read the specs for one of the latest Hitachi HDD, https://www.hgst.com/sites/default/files/resources/USC10K1800_ds.pdf . It indicates a speed of SAS 12 Gb/s which is 1.5 GB/s. Is it the sequential ...
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2answers
91 views

Server utilization and how to deal with datacenter failure

New technologies like Docker, Mesos, Kubernetes etc. allow much better server utilisation in an organisation. However, I'd like to know how utilisation can be maximised across two datacenters, taking ...
1
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0answers
53 views

What technology do data center use to guarantee low RTT?

I was reading about data-center-tcp DCTCP and the paper was talking about the low retransmission timer (RTT) of about 250µs, but didn't state how that is being done. Somewhere else I read that DCTCP ...
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1answer
63 views

Servers in different DC's - performance impact

Today Linode eat my nerves completely by shutting down main DB server for 25 minutes due to their internal network problems. Right today I was going to set up another one server at linode to set up ...
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0answers
2k views

HDFS performances on apache spark

I have several issues related to HDFS, that may have different roots. I'm posting as much information as I can, with the hope that I can get your opinion on at least some of them. Basically the cases ...
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2answers
208 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 \...
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1answer
380 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. ...
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8answers
6k views

Server Room Temperature Control

We have a makeshift server room that contains a rack with half a dozen servers and some network equipment. The room is cooled by a dual-hose portable a/c unit that is vented into the attic. At this ...
4
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0answers
91 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 ...