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Questions tagged [redundancy]

Redundancy is the duplication of critical components or functions of a system with the intention of increasing reliability of the system, usually in the case of a backup or fail-safe.

300 questions
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Eliminate single point of failure for webservers?

I know in DNS, that each of the DNS servers will be tried to see if they will respond I know in email that in the event of a failure it will go to the next one in the list or it will hold the mail for a period of time As far as I know, in…
700 Software
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How to make two UPS redundant?

How to setup UPS for redundant power supply if 1st UPS goes down then system should work on 2nd UPS if 2nd goes down then system should work with 1st UPS like server power supply.
Ravinder
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DNS setup for website on geo redundant servers

Let's say: I have a website written in English and shown on www.example.com. The website is on a US server now (based on cPanel/WHM) at the IP address 192.0.2.0. I can manage the DNS of example.com using a control panel to add/modify any records:…
Marco Demaio
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Mobile broadband Server backup

We have a windows server. It is attached to a UPS. The internet connection is not plugged into the UPS. If the power goes down in the building the UPS kicks in and emails out saying that the UPS is working. There is no internet connection as the…
Lisa
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Are Dell R610 4 Port NICs as good as a Second NIC in terms for Redundancy

So my general question is does a multiple port NIC supply the same redundancy that two complete NICs do? My Specific question is in what is the case with the 4 port NIC that comes in Dell R610s. I know we can all guess that the separate NICs are…
Kyle Brandt
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is it possible to use a windows server as a datastore for vmware esx server

I'm a relative noob at virtualisation but would like to roll it out in our organisation. The application I'd like to test with needs to be back up pretty quickly after failure... So I'd like to put 2 VMWare servers on the network and have the…
Paul D'Ambra
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Redundant L2 Uplink (OS10)

I am trying to design a redundant uplink to a service provider from a pair of Dell S4112 switches running OS10. We a getting two uplink connections from the service provider, but they cannot be delivered as an LACP trunk. Our switch pair is…
DEHAAS
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Upstream Nginx location blocks into site confs

I have a few websites on a Ubuntu 16.04-Nginx server environment and the Nginx conf file of each includes this set of location blocks: location ~* \.(jpg|jpeg|png|gif|ico|css|js|ttf|woff|pdf)$ { expires 365d; } location / { index index.php…
Arcticooling
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Which distributed filesystem will actually fit my needs?

Hear me out I have seen the question asked (in different forms) here, here, and perhaps the best one I found was here, but I do not think this is a duplicate because quite some time has past since those questions were asked, and my question has its…
Michael
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How to manage redundant ISPs with dynamic DNS

I'm trying to make my small business network a bit more robust by adding a fallback ISP. What I can't figure out is how to manage the DNS for inbound connections. A simplified view of my network looks like this: +-------+ +-------+ | ISP 1 | |…
Dominic P
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Data Backup redundancy/backups

I am looking at setting up a backup solution... well including in my backup solution actually... an external harddrive on my main file server. I then use something like Microsoft SyncToy to 'sync' data onto the external hard drive. I currently have…
TravisPUK
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tools for geographical redundancy

I'm writing a spec for a high availability application. I need a low budget solution to be able to failover between two data centers. Replicating databases and content I'll be able to manage solutions for. What are some solutions for "cutting over"…
imaginative
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Achieving File Server Redundancy

We are in the process of moving all servers (or virtualising physicals) into a central datacenter connected via MPLS. Currently we are fully redundant on most aspects - RDS Farms, SQL Clusters, multiple DCs, hardware failover for firewalls etc. The…
PnP
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Best method to get "transparent" redundancy for Ethernet?

My apologies if this is an obvious question, I'm a newbie as far as redundant networking goes, and I'm not sure what keywords to Google for. My application scenario is this: The system consists of a small number of Linux-based servers (anywhere…
Jeremy Friesner
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UPS systems in parallel for redundancy and/or capacity, generator as backup, ATS,

I am about to upgrade our server room's power plan and would kindly ask you for your help with a proper, optimal design / advice on "good practice" approach. Please note that our business is small, but would nevertheless want to have a solid…
Charlie
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