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Questions tagged [failover]

The automatic switching to a redundant or standby computer server, system, hardware component or network upon the failure or abnormal termination of the previously active application, server, system, hardware component, or network.

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Replicate selected postgresql tables between two servers?

What would be the best way to replicate individual DB tables from a Master postgresql server to a slave machine? It can be done with cron+rsync, or with whatever postgresql might have build in, or some sort of OSS tool, but so far the postgres docs…
Michael Guthrie
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Deploying a high availability Postresql 9.0 on Amazon EC2 with PGPool-ii

We have an existing web application that uses Postgresql 9.0 and PGPool-ii. I am thinking of migrating our infrastructore to Amazon EC2 and was inspired by the following link:…
Mike
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Cross-colo fail-over design, DNS level fail-over?

I'm interested in cross-colo fail-over strategies for web applications, such that if the main site fails users seamlessly land at the fail-over site in another colo. The application side of things looks to be mostly figured out with a master-slave…
Parand
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Azure Traffic Manager SSL Setup (not classic)

I have an Azure API App Service that I want to configure "priority" traffic management for (this is the new Traffic Manager, not classic). I have deployed the service to two separate Azure regions and configured a Traffic Manager instance to…
JTW
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Connection to MongoDB replica set takes a minute+ in PHP when a secondary is unreachable

I have a replica set consisting of 5 members: primary+arbiter on server 1, secondary+arbiter on server 2, hidden secondary (backup node) on server 3. I expect this configuration to work if one server goes down or loses connectivity…
mephisto123
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httpd mod_proxy_balancer failover failonstatus - transparent switching

I am using mod_proxy_balancer to manage failover of backend servers. Backend servers may return an error code instead of timing out when some other backend service fails such as NFS and we want such servers also to be marked as failed nodes. Hence…
Praveen
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How does Terracotta work in this situation?

So lets say I have an N sized server array set up like so: alt text http://www.terracotta.org/web/download/attachments/43909161/ServerArrayMirrorGroup.png I have a simple JavaBean/POJO: package example; public class Person { private OtherObject…
mainstringargs
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How to handle Activemq's max frame size exception with failover transport

I am developing an application that uses activemq to exchange messages, some so big that I want to cancel then. We work with the activemq failover transport with two ActiveMQ instances (master/slave). The broker itself has the 100mb framesize limit…
Raphael do Vale
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Log4j2's FailoverAppender Error: appender Failover has no parameter that matches element Failovers

When I compile my spring 3.2.9 web application using log4j 2.1, this error appears in the console: 2015-02-02 12:08:25,213 ERROR appender Failover has no parameter that matches element Failovers What I understand is that the element "Failovers"…
Deses
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Nodejs failover

I am a beginner in nodejs. I am trying to use nodejs in production. I wanted to achieve nodejs failover. As I am executing chat app, if a node server fails the chat should not breakup and should be automatically connected to a different nodeserver…
user2344173
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How do I cluster ServiceMix?

I am looking for some initial pointers on how to cluster a ServiceMix solution. Basically what I need is: having 2 (or more) ServiceMix instances serving my routing needs and sharing the load if one instance fails, other(s) continue to serve if the…
Janne Mattila
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Failover with mongodb

I have to setup a database that can handle failover (if one crashes the other takes over). For that, I decided to use mongodb: I set up a replica set with two instances. Each instance is running on a separate VM. I have several questions: It is…
rmonjo
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Postgres 9.0 and pgpool replication : single point of failure?

My application uses Postgresql 9.0 and is composed by one or more stations that interacts with a global database: it is like a common client server application but to avoid any additional hardware, all stations include both client and server: a main…
doc
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How to enforce message queue sequence with multiple WCF service instances

I want to create a WCF service which uses an MSMQ binding as I have a high volume of notifications the service is to process. It is important that clients are not held up by the service and that the notifications are processed in the order they are…
batwad
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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 the failover database instance IP when the…
Dave
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