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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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How to use a cloud to host web sites?

To host web sites currently we are using dedicated linux boxes hosted in the UK. But managing them is a nightmare, backups, massive loads, downtime etc... I was looking into OpenStack which was developed by RackSpace. Would it be possible to use a…
David Maitland
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Redundance for different processes running on the same server

We have a system consisting of different components/services like database, webserver, fileshare, some self programmed daemons, etc. We now have the requirement to make all components/services redundant. As we want to start with a smaller system, we…
markus
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Amazon EC2 SQL Instance with Cheap redundancy

I'm looking at transitioning from a dedicated hosting provide to Amazon's EC2 instances. The website is an asp/asp.net website with SQL Server 2008 as it's backend. It has zero redundancy as is besides the 24 hardware replacement we have in the…
Josh
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Redundant Mailservers

We recently had a harddisk failure on our mail server (debian/postfix/courier) so I'm researching a way to build redundancy. The first way I found was to setup multiple mx Records in the DNS Server so that the second Mailserver jumps in when the…
Christoph Winkler
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Multihomed email

Our primary MX record points to an external server which handles spam filtering, thereafter the mail is pushed to our internal mail server. The mail is never stored on the external server for longer than it takes to process the mail and deliver it…
Richard Keller
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Cloning Two Windows Servers

Basically I have a server running MSSQL, MYSQL, APACHE, IIS, ORACLE, PERL and other windows services. I am looking for some hardware solution that would allow me to clone a server on to a back up and provide some fail-over mechanism. Can anyone…
Amarnauth Persaud
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IIS7: one domain, one IP, two servers, one as fallback

I would like to have a setup where I can tell any of two servers to be the "main"-server on a specific IP (for redundancy reasons). Both servers should be accessible at any given time but only one should respond to public IP. IP-restriction is…
Toft
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How to Add a Secondary Server, Correctly

Just wondering if a network of approximately 15 users has only 1 Server Running Windows 2003 and wanted to add a "secondary server" so that in the event the "primary" fails for any reason the secondary can take control while the primary is fixed. Is…
Ike12
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Failover/Load balancer for WHM/cPanel

I have a simple question for which I have not been able to find a simple answer. Here's the scenario: Server 1: WHM/cPanel with multiple accounts/dbs Server 2: WHM/cPanel with multiple accounts/dbs Server 3: Heartbeat for Server 1. (Wwitches the…
recluze
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Redunt link over single cisco router

I have one cisco router 3825 with multiple WAN card connected to two ISPs and I have one 2811 with two WAN cards in branch offices. I need to configure these routers to connect both links and once one is down, the next link will be selected…
OSPF bigginer
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Simple Central Storage for HA mail server

I will have 2 Postfix servers. One will be a backup of the other. What is the easiest method to provide central storage to both of these boxes? My infrastructure is very simple: Just a lot of Xen hosts, so there is no SAN or anything. Each Xen host…
jtnire
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mysql redundancy with mixed storage types

Looking at building redundancy into our system, as we are currently, um, exposed should anything blow up. We have a large-ish DB (150G), consisting of a mix of innoDB and myISAM table types. We want to build redundancy in, with a pair of DB servers,…
David Shields
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Best way for Linux site and Database redundancy

I am looking to set up a redundant network that uses a load balancing solution to redirect traffic between two servers. The load balancer I will use is HaProxy. Example: Traffic -> Haproxy -> Server1 or Server2 Now, both Server1 and Server2 will…
Chris
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Best way to add a second server to existing site in case of downtime?

Well my $379 dedicated sever just went cold again for the second time this month. I need to find a way to get another server going at a different provider that I can just flip on in case this happens again. What is the best way to deal with this…
james
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We need MySQL redundancy but replication is not an option

We have an app with some peculiar characteristics that prevent us from doing master-slave MySQL replication. It's something to do with random numbers being generated for each session and stored procedures. We plan on fixing the app next year but in…
Matt Herzog
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