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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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Implementing DNS Redundancy - Web Hosting

After our domain registrar/name server host went down we have found that DNS is a major single point of failure as its also taken down all of our email (Office365), web, hosted services etc.. I want to get some redundancy around it, is it a simple…
TheRealTy
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Redundant OpenVPN tunnel

I'm trying to set up a fully redundant OpenVPN tunnel, with two routers on each side. All the tutorials I saw (such as http://dev.vyatta4people.org/highly-available-openvpn-connection-between-two-offices/) mention a site-to-site setting, which…
raphink
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web server redundancy in case of network failure

I have a (web) server at a datacenter, which at times (as all datacenters do) has network failures (for like 10-30 minutes). I have a second server at a different company (datacenter) which I could use as a failover solution. Now, I was wondering…
MirrorMirror
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munin-node send data to more than one master?

I'm in the process of making everything on our server setups redundant, and so comes the monitoring. We have one virtual machine acting as munin master and all other virtual machines are munin nodes (version 1.4 on Ubuntu 12.04 LTS btw.). So my idea…
gforcada
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What is the best option for SIP service redundancy?

From your practical experience, what is the best option for SIP service redundancy? a) one SRV record pointing to a hostname which has two A records b) two SRV records pointing to two different hostnames c) high-availability tools which switch over…
Stanislav Sinyagin
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Server Failover Scenario

I've got two Dell PowerEdge 2950 servers. In order to (hopefully) eliminate any downtime, I must implement a solution to detect and adjust to component failures, environment failures, etc ... the usual "downtime is the enemy" scenario. From this…
cookbr
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Record DNS for 2 static ip - fault tolerance

i've a web server in a DMZ reachable from 2 different public static ip addresses provided by 2 different internet connection by 2 different ISPs. I want to create a record let's say "myserver.contoso.com" that load balance the two ip in normal…
eldblz
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Preparing a server for mysql replication and use it as standalone

I want to host an application on a single server running MySQL server. To get the best performance I plan on using a UNIX socket connection (to avoid TCP overhead). Later, I would like to scale up by adding extra servers which would be MySQL…
Max
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Basic redundancy for EC2 (wordpress + mysql)

I've got a website that I would like to add redundancy to. It's not a massive website, and will probably only receive a handful of database updates and/or files per day, however it's very important that the website is up at all times. Since the…
Alec Sanger
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High available and secure FrontEnd to WebApps behind a firewall

my question is about proposed implementation of high available and secure FrontEnd to WebApps behind a firewall. The components of the network and their relationships are as follows: 1) 2 WebApps servers behind a firewall (BackEnd), denoted by GUI1…
Maciej Skorski
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ISP Redundancy Hardware

I've tested Microsoft TMG 2010 to load balance my two DSL lines and it works fine. Can I expect the same level of results and security to be achieved with a less expensive firewall appliance?
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Servers configuration to improve performance and offer redundancy for ASP.NET site with SQL Server

I'm administrating a fairly large website (currently about 300 thousand page views a day) which is expected to grow fast. Currently both IIS and SQL Server are running in a quad core server, with RAID 10 SAS Hard Drives and 32 GB of RAM. A less…
Albert
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Sonicwall firewalls and redundancy of route based vpns

I am attempting to configure a route based vpn on a Sonicwall TZ device. The datacenter has two public IPs on different subnets (A and B). The remote office has 1 public ip (C). When I configure two tunnels from the datacenter firewall to the…
Min Kim
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How to use Route53, or any other service, to redirect to a "backup" site when the main one is unreachable

I have example.com managed by a DNS server that associates it to some IP address (ip1), owned by a first web server where the full site is hosted. I also have a secondary webserver (with ip2) that hosts a "backup" site, with only the public pages…
devguy
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Redundant FreeRADIUS + MySQL

I’m working on some web service having it’s AAA implemented by FreeRADIUS + MySQL on Debian. The problem I’m working right now is HA & scalability of RADIUS. If the FreeRADIUS machine or MySQL machine goes down it takes down entire service. I have…
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