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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.

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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 instantly served from London. The DNS service I'm…
Mark172
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Does chassis mid-plane provide load balancing for power supply

I am new to blade chassis management, and i want to know what is the purpose of mid plane apart from connectivity. Does it provide load balancing among the power supplies. If so does that mean it automatically ensures power supply redundancy or for…
Chu
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How to achieve redundancy with layer 2 switches only in network?

I am trying to find out way to make network design with only simple un-rooted switches which avoid redundancy! I use 2 computers & 2 simple switches each switch connect to one pc & between both switch I connect 2 wires for check redundancy. But as…
Mandar Khire
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Two drives, how can i max reliability and uptime?

I have an asterisk pbx. It has 2 drives in a raid 1 setup. However if my main drive fails my 2nd won't boot, as it has no boot partition. The most important thing for me is up time. If there is a power outage and or a drive failure I'd like the…
wlraider70
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Redundant Connection Issue

I'm trying to set up a redundant connection for our web hosting servers. I have a BGP-capable router connecting two lines from two separate ISP's, one fiber (primary), one DSL (failover). I've already confirmed that I can push routes into the DSL…
Adam
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Overview of multiple mx server set up

Would someone please show me the overview of how multiple mx for a single domain is set up to communicate with each other? I am not talking about how to configure the postfix or DNS mx entries, I am talking about the network diagram and the sequence…
Jake
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Is it possible to have multiple storage servers in a failover cluster?

I'm familiar with setting up RAID arrays and am running a few in my home environment. I was wondering if it's possible to have multiple storage servers in a failover configuration. What I hope to achieve with this is to have a certain redundancy…
Mephy
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How I do to run only a software in more than one computer?

I need to run a unique instance of a software in more than one computer, how I do this without a centralizer server? For example: 4 computers interconnected by the local network, 2 of then has "the hardware" that I need to send a requisition. I…
Only a Curious Mind
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Can I implement network redundancy just with static routing tables?

I have a Windows 2003 server which is connected to a router at 192.168.15.1 via 192.168.15.10. I also have a linux server connected to that same router via 192.168.15.90. And I have a direct connection between those two machines via 192.168.15.11…
Ian
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Redundant Web Space

I have following problem. My domain is registred on service "A" My web-space (not a server) is on Godaddy. Once a week is my service unreacheble I am sure that is godaddy problem. My idea is to by some webspace of one different service to make my…
alisia123
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What's the best method to achieve full redundancy in a dedicated server?

I've been reading about full redundancy to achieve almost if not 100% uptime for your mission critical applications (handling financial data) running in a dedicated server, but I still can't wrap my head on how I could do this. 1) Let's say I have…
officeboi101
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Email server - redundant, mobile, and secure

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Robot
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Loadbalance between Heroku and AppHarbor?

How would you set up simple redundancy between these 2 "cloud" providers? Does a DNS fallback seem reasonable (that would update records when one is down) or would it take too long to propragate the changes?
knocte
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Common Practice for router setup in a business

At the company that I'm working for, we have one router (SonicWall TZ 210) and it occasionally go down during business hours. All I have to do to bring it back up is to power cycle the router but during this time all employees in the company has no…
Kirk
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How many SSDs are needed to assure redundancy?

If we consider, hypothetically, that a server farm is being designed to have 100TB of storage using solid state drives (SSD), each with 250GB each. My question is how many SSD are needed to ensure redundancy by: i) RAID 1 ii) RAID 3 iii) RAID 5 What…
Francisco Maria Calisto
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