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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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Openstack redundant architecture on three servers

I would like to deploy an Openstack architecture on three (super)servers in a way that if one of server is down the Openstack infrastructure is still functionning. What is the best way to deploy this ? Is deploying Control, Network and Compute…
SwissFr
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Can my redundant network setup be made more robust?

With my current design I have a DL380 Gen9 running ESXi. It has redundant NICs cabled to two different switches. Those switches in turn are both cabled to a third switch that allows my workstation to be connected. My testing so far has shown the…
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SSD's in servers, best practice redundancy?

So some might say Im an experienced infrastructure architect guy and have been putting together server farms, storage subsystems and networks for a number of years in datacenter environments (specialising in virtualisation). I have been putting…
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Howto do VCSA redundancy?

We are currently in the process of setting up a new VMWare environment which is now only in lab phase. We are studying the possibility to have a vCenter cluster with an active and a standby/mirrored/whatever... vCenter, this is with the VCSA…
Nicolas Toureur
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SonicWALL HA w/ Dual WAN HSRP from two redundant switches

We're adding two SonicWALL NSA 2600 firewalls to our current setup. We currently get two WAN connections from two separate Cisco routers running on the same external subnet with what I believe is HSRP. Right now we run these two connections into two…
Jake Braun
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How much failover redundancy is enough?

I'm working on a client-server system where all clients currently submit their transactions to essentially a single west-coast IP address to reach what is called the "gateway" application. The gateway does some accounting and dispatches each…
Witness Protection ID 44583292
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Probability of Blade Chassis Failure, Redundancy

Suppose I have a blade server HP C7000, with three blades. Q1. Is there any disaster recovery technique that provides redundancy between blades? If any one blade goes down the second should come up with the same configuration. Q2. Is it possible to…
Gaurav Arora
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Server Backup Strategy for Amazon EC2

Where and how should I backup my EC2 / EBS based snapshots OUTSIDE of EC2? EC2 provides a great product with their EBS based snapshots. However it is also a high risk point that someone could obtain our credentials and delete all the snapshots. …
csi
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Redundant Firewalls And Switches HSRP and CARP

I currently have planned 2 x uplinks (HSRP Active/Standby) 2 x pfsense firewalls (Carp Enabled) 2 x layer2 switches Please criticize or offer help on the correct way to do this. I have a feeling im missing a valid point of simple networking. The…
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Is Microsoft's "Storage Spaces" just LVM for Windows?

From initial reading, it looks like Microsoft's forthcoming "Storage Spaces" is an LVM-like tool for Windows. Is this a correct assessment? If it's not merely LVM-for-Windows, then what is it, and how could the approach be replicated on Linux/Unix?
warren
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How much power draws a redundant PSU?

One supermicro enclosure comes with "3 SP382-TS 380W Power Modules for a total of 760W". 2x380W = 760W, okay, but there are 3! So where is the missing third 380W equalling to 1140W?? Is it hot-sparing, kicking in when one dies? What wattage is…
isync
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MySQL Redundancy for High-Availability over the internet

I am testing out some infrastructure options before I start writing a web application. I would like to have two separate MySQL database servers at different physical locations, but if one of them goes down, I would like to be able to fail over to…
muncherelli
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PowerConnect switches, Juniper firewalls and esx redundancy

Let me preface this question by saying that I am a developer and have basic knowledge of networking. My current job requires that I wear many hats. I am building out a DataCenter for our SaaS Application and have purchased all the hardware on…
Chris Kooken
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Split your DHCP scope among multiple servers?

I want to implement a redundancy solution. I have two subnets all windows XP machines - each with their own DHCP server - joined by a bridge. Currently - all machines get DHCP leases from the one DHCP server with the other disabled. For when the…
Hawkeye
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Redundant Load Balancers for Windows-based Web Servers?

I'm having some trouble trying to figure out the technical details of the below design; specifically in the area of the redundant load-balancers. The web servers are running Windows Server 2003 R2 64 and serve .NET applications via IIS. The…
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