In computing, failover is automatic switching to a redundant or standby computer server, system, or network upon the failure or abnormal termination of the previously active application, server, system, or network. Failover and switchover are essentially the same operation, except that failover is ...

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Monitoring an ISC DHCP Failover Status Using Nagios

I recently implemented ISC DHCP Failover and it's working beautifully, but I'd like to monitor the current status of the failover using Nagios. Ultimately, I would like my Nagios check to: report ...
2
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1answer
389 views

Failover/redundant SSH

I have an SSH server where multiple clients SSH in to maintain a bunch of port forwards. What I want to do is, if the server goes down, have the clients automatically connect to the next server. The ...
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1answer
730 views

Getting heartbeat to fallover when apache service fails

I've currently got heartbeat set up nicely on ubuntu linux server so that if the heartbeat service is not detected (either because the server is down or just the heartbeat service is down) it ...
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3answers
1k views

Is there any open source solution for failover of incoming traffic?

We have two ISP's and both ISPs' IP NAT with the same webserver IP. I want failover for incoming traffic, is there any open source solution? Can I do it by making two name servers, one for each ISP? ...
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1answer
412 views

Intermittent unavailability of an instance in a failover cluster while a standby node is offline in a SQL Server 2008 failover cluster

I've got a small failover cluster that I run for the websites my company has. During a RAM upgrade of the standby server, our websites started to show errors about not being able to access the ...
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2answers
684 views

Configure Hyper-V Server 2008 R2 Failover Cluster from Windows Vista

How do I configure Hyper-V Server 2008 R2 Failover cluster capabilities? Can I use mmc from a vista system or do I have to use Powershell?
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1answer
701 views

EC2 database server failover strategy

I am planning to deploy my web app to EC2. I have several webserver instances. I have 1 primary database instance. I have 1 failover database instance. I need a strategy to redirect the webservers to ...
2
votes
1answer
294 views

TFS failover options for single server?

What are people using for TFS (2005) failover when using a single server configuration? It seems that most help docs from MS are about dual config (app and data tiers). In fact I found a msdn blog ...
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5answers
468 views

How do you redirect dns in case of line downtime?

We are considering to selfhosting for a domain. How can we provide a page to visitors in case of lines out, serverfailure or powerfailure?
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0answers
112 views

Keepalived failover not working for Static NAT target behind Cisco ASA

I've got a Cisco ASA[0] with a pair of Linux boxes in the DMZ running Keepalived and HAproxy acting as a load-balancing failover pair for another pair of Windows servers, also in the DMZ. I'm ...
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0answers
118 views

TeamCity (or Jenkins) with Cluster/Replicated servers

We use Team City 7 for Continuous Intergration. Sometimes I need to bring down the server for maintenance which stirs up complaints. Is anyone using a cluster for these types of servers where there ...
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0answers
178 views

Openldap Mirror Mode replication failover

We have currently one master ldap server and around 400 slave servers which are partially replicated through that master.All openldap versions are same and 2.4.31 What we want is actually if master ...
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1answer
95 views

SQL Server 2008 R2 Failover Clusters behaviour on multiple failures

I'm testing the resilience of one of our test systems. We have 2 x DB (SQL 2008 R2 on Server 2008 R2, running in ESXi VMs) arranged in a Failover Cluster. Shutting down the Active SQL Server service ...
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0answers
61 views

Solr on a two node Jboss cluster

Are there any issues with deploying Solr on two node jboss cluster with the index shared on a NFS mount point? We would like to do this for high-availability across data centers.
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2answers
135 views

DRBD(-alike) solution to enable failover for spool files

Im about to setup a failover-setup for our Kannel service using hardbeat and DRBD. One machine is the primary one, when that one dies/goes down, it switches to the secondary. Kannel is using a spool ...
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1answer
174 views

VPS hosting with IP failover across datacenters

Is there any VPS hosting that would allow IP failover (or remapping) across different datacenters ? The only one I aware of is EC2 with their Elastic IP. What I'm trying to achieve is to have servers ...
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1answer
154 views

Failover of mirrored webservice

We are using a webservice (over http) which has 2 mirrored servers, accessible as, say www.blah.com and www2.blah.com. Is there a software solution that would help us handle failover? Currently if one ...
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1answer
329 views

SQL Server Database In Single User Mode after Failover

Here is a weird situation we experienced with a SQL Server 2008 Database Mirroring Failover. We have a pair of mirrored databases running in high-availability mode and both the principal and mirror ...
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4answers
987 views

Active directory failover

I have a Windows Server 2003 SP2 server which is runnig as Active directory for my testlab.com forrest. I observed that "netlogon"service is frequently stopping automatically as it results unable to ...
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5answers
2k views

Free DNS software with failover support? [closed]

I'm looking for DNS software that can accomplish the following: Check health of all A records at set intervals If server is unresponsive after multiple successive checks, replace A record with a ...
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6answers
2k views

Does anyone know of a free solution to perform failover for VMware ESXi? [closed]

I would like to setup a free/custom solution to perform failover for VMware ESXi. The setup is as follows: 2x Physical servers each with independent storage. For each physical server there are 2x ...
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5answers
1k views

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 ...
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8answers
3k views

Dual WAN Router w/Failover for < 50 IP Network Recommendation

Looking for a good dual WAN (for failover, don't care about load balancing) router for a small network (<50 devices). I don't want anything home-grown - has to be commercially supported hardware. ...
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3answers
4k views

Is it possible to make redundancy on HAProxy server?

I am going to use HAProxy as a load balancer that will balance requests on 3 application servers. But what if balancer server (HAProxy) fails at some point? I was thinking of cloning the first ...
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2answers
355 views

SSD redundancy via HDD

Is there a way to guarantee redundancy to an SSD using an HDD? Raid 1 is the best choice to guarantee redundancy in HDDs, but SSDs are too expensive to guarantee redundancy via RAID. If I was to ...
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5answers
2k views

How to accomplish a Windows share failover system?

I have a primary and a backup windows 2008 server, and a bunch of windows XP clients that map a drive to a share on the primary server. If the primary server goes down, I want those client machines to ...
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2answers
725 views

How do I do IP Failover for my Public IP address with Linux HA

I did a lot of experiment with heartbeat, corosync and pacemaker for IP FailOver which I have to do with Public IP. I did more than one ip failover(VIPs) with two nodes, also with three nodes BUT ...
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4answers
242 views

Are there any open standards for server failover?

I'm building a client-server application and I am looking at adding failover to the client so that when a server is down it will try to connect to another available server. Are there any standards or ...
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6answers
758 views

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 ...
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2answers
426 views

One website, two public IPs, each IP on separate line, how to do failover

We have a website that sits behind two firewalls, main and failover. Main and failover firewall have different IPs, and different Internet connections from different providers. How to provide failover ...
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4answers
108 views

Just one client bound to address and port: does it make a difference broadcast versus unicast in terms of overhead?

Scenario: I am implementing failed over for a network node, so my idea is to make the master node listens on a broadcast ip address and port. If the master node fails, another failover node will ...
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2answers
491 views

Several load-balancing servers listening on single IP/port?

Let's say I have a fully working, load-balanced application server environment. All servers have to fail-over gracefully. It's relatively easy to do with the application servers, but how can I ...
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1answer
247 views

How to connect drive array to redundant motherboards?

How should one connect a small storage array, four 3TB SATA drives for now, to two motherboards or controllers as a failover system? This means avoiding adding another single point of failure such as ...
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1answer
176 views

How could dynamic DNS work if DNS updates take hours to propagate?

Simple Failover markets itself as: continuously monitors your servers to find out which are up and which are down, and then it dynamically updates your DNS records accordingly so that your ...
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2answers
2k views

Best option with 3ware 3DM2 when drive has bad sectors?

I have a FreeBSD server running a RAID 5 array using the 3ware hardware controller 3DM2 (user guide PDF). It uses 3 hot-swap drives + 1 spare. The last couple of months one of the drives have ...
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3answers
467 views

Windows Failover (100% Uptime for critical ops) Hosting Recommendations

I have been searching for a windows hosting provider that has a failover for 100% uptime, and I wanted to get your opinions and recommendations on this. Our software will be hosting mission critical ...
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7answers
506 views

Mirroring Drives

I'd like to mirror a drive between two windows servers for fail over/disaster recovery. I assume there is a software package for this. What do you use?
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1answer
124 views

Hyper-V Manager/Server failover/redirections

I have currently one Hyper-V Server 2008 R2 server installed, it's successfully running 4 VM's, but memory/RAM is starting to become sparse. I actually have a 2nd machine available, so my great idea ...
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2answers
386 views

High Availability without IP Failover?

Are there strategies or techniques to create HA environment when IP failover isn't available? I'm reading a guide at Linode's library which describes exactly what I want to do, but I'm not sure my ...
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1answer
353 views

Implementing Automatic failover with SQL Server 2008 R2 Web Edition

I am trying to implement automatic failover for an ASP.NET MVC website running on Windows 2008 R2 Web Edition / SQL Server 2008 R2 Web Edition. I know that this is not supported out of the box, but I ...
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6answers
2k views

Alternatives to DNS round robin

Sorry for being unclear previously. We have a vmware virtualized server instance that is our main production server. I stores a series of web based applications on close to a hundred unique top level ...
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1answer
2k views

DNS Made Easy's DNS Failover, is it worth it?

I have decided to start using DNS Made easy for my external DNS but can't deside really if I should go for the $30 or $60/year plan. The smaller plan probably covers my current need as I only have 5 ...
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3answers
2k views

Bonding iSCSI connection Linux

simple Question: how can i utilize two or more ethernet interfaces on target and initiator to have fail-over to use bandwith of all interfaces Answers? My Setup: both systems run linux and have ...
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4answers
308 views

What is the better way to add extra servers for reliability in our case?

We have the following servers: A. 1 x web server running MySQL (a forum). B. 1 x web server running RT with Postgres. C. 1 x web server running a home grown app with MonetDB as the backend Now of ...
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1answer
49 views

Failover clustering or Network Load Balance on windows server

I have 2 servers with Windows 2008 R2 standard OS. I need to create a cluster in case on of the servers goes down ; so the other one will continue provide services. The services we mostly use are a ...
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3answers
70 views

Building right system for my needs [closed]

I will be providing "File-Hosting" service and I need something that works with me along the line and allow the project to expand. At first I was thinking about one big server with RAID 5 as a ...
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2answers
608 views

Linux server failover

I have two Linux servers (CentOS6) - both are identically configured connected to the same switch with a direct link between them. I only have one external IP that is assigned to eth0 on both servers ...
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3answers
3k views

How to configure ubuntu server with 2 NICs, and 2 Gateways (2nd as a failover)?

Here is a basic overview of the network configuration for one of our servers: [Datacenter] [Internet Connection #1] >> [Firewall 1 (xx.xx.xx.1)] >> [Server (xx.xx.xx.10)] ...
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1answer
207 views

Automating failover to recovery site using SRM (API)

i am looking for a product that could integrate with SRM (we support following HW vendors: NetApp, EMC, Hitachi, Eternus and HP) and allow automation of failover from primary to disaster triggered by ...
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6answers
387 views

Copy database with Sql Server 2005

My situation is as follows: I have a production Sql Server 2005 database. Once a day I want to duplicate this database to another failover database which is on the same server instance. I don't want ...