Stack Overflow
Stack Overflow

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.

859 questions
4
votes
2 answers

Restart log shipping when out of sync

The scenario is. A database secondary server are for different reason out of sync or is suspected that is not sync. Someone has made the secondary databases online by mistake or other mishaps. If you now want to make sure that they are set back on…
Patrik Lindström
  • 1,057
  • 3
  • 13
  • 23
4
votes
1 answer

Oracle DB failover in Spring Boot handling

I would like to create annotation based interceptor which will log the current DB details wherever primary db is failing to server the request and secondary db will start to give support for the application. I found below code from mentioned link…
sunleo
  • 10,589
  • 35
  • 116
  • 196
4
votes
1 answer

Kafka Failover and Replica

Let's assume I have a Kafka Cluster of 3 brokers and 3 zookeeper. I have a single topic accountsTopic which is setup as replication factor of 3 and ISR of 2. If the Leader dies, kafka will elect the ISR as leader, but the 3rd one, (which say for…
Divs
  • 1,578
  • 2
  • 24
  • 51
4
votes
2 answers

What does Spark recover the data from a failed node?

Suppose we have an RDD, which is being used multiple times. So to save the computations again and again, we persisted this RDD using the rdd.persist() method. So when we are persisting this RDD, the nodes computing the RDD will be storing their…
KayV
  • 12,987
  • 11
  • 98
  • 148
4
votes
1 answer

Java outgoing TCP connection failover based on multiple DNS results

If I make a connection using new Socket("unit.domain.com", 100) and the unit.domain.com DNS record has multiple IP addresses in the A record.. In the event of a failed connection, Does Java automatically connect to one of the other addresses in the…
700 Software
  • 85,281
  • 83
  • 234
  • 341
4
votes
1 answer

Any advice on how to handle fail-over in an ejabberd cluster?

Context: I have a system that will need to support 20,000 connected chat users spread over 100 chat rooms. During performance testing I've found that I can get up to 6,000 connected users on a single box before I get a crash dump, so in production…
user141682
  • 432
  • 6
  • 9
4
votes
2 answers

How to change sqlConnectionString for sessionState in SQLServer mode at runtime?

We're trying to find a way to change the sessionState's sqlConnectionString (in SQLServer mode) at runtime. We're implementing a fail over for our SQL server and we want to catch when the sessionState fails to have access to my SQL server and tell…
Sébastien Richer
  • 1,642
  • 2
  • 17
  • 38
4
votes
2 answers

Failover scenarious for the Service Bus with NServiceBus or MassTransit

I need to build Identity server like Microsoft's http://login.live.com. To handle failover I will have multiple web servers nodes. The plan is that all database write operations are done by sending messages to the database server. Database will be…
Robert Vuković
  • 4,677
  • 6
  • 31
  • 47
4
votes
0 answers

Quartz Scheduler with Cassandra NoSQL database for Cluster failover mechanism

I am using Weblogic 12c in a cluster environment, I am using Cassandra for database operations. My requirement is to execute a batch which picks up records from DB, process them and upload to a webservice. For this I am looking at Quartz…
Sachin DG
  • 65
  • 9
4
votes
5 answers

How to build an available web application

Let's say that we are about to build an web application where high availability is top focus. Our customers are companies, so downtime are equal to loss of revenue for everyone involved. To sum it up, we need to be online at all times to keep…
Industrial
  • 41,400
  • 69
  • 194
  • 289
4
votes
0 answers

Redis services loses connection every day in same time

We use a Redis (version 2.8) with Windows in our production servers. And have next "master-slave"configuration: 3 services in separate servers (1 master and 2 slaves) 3 sentinels in each server Until we do not have a lot of loading and big size…
Andrey Zhminka
  • 243
  • 4
  • 16
4
votes
3 answers

Moving EC2 Instances from one region to another

I am trying to migrate EC2 instances from one region to another. When an EC2 goes down in region A, how do I get this to start in region B? I am having a hard time trying to figure out what to do. I know how to copy EC2 instances within…
user3859018
  • 379
  • 1
  • 5
  • 14
4
votes
3 answers

RabbitMQ HA & Failover

I've read both the clustering and HA chapters and got a fair understanding on RabbitMQ clustering. One thing I did not understand is, having 2+ nodes on the cluster and a set of HA queues, how connections can be made by the clients so that if one…
Martin
  • 1,317
  • 3
  • 13
  • 18
4
votes
2 answers

Can MOSS 32 bit and 64 bit exist in the same farm?

I am trying to setup a failover location for MOSS. The current farm is built on 32 bit Windows 2003. The servers ar the failover location are all 64 bit Windows 2008. Is there any way to make these two environments talk and stay in sync? I have…
Ryan Michela
  • 8,284
  • 5
  • 33
  • 47
4
votes
1 answer

connecting to mirrored databases after failover

I have two mirrored SQL Servers (A and B for example). I wrote a simple C# program (connect via SqlConnection), which insert rows into DB. When I make failover on server A, the program throws exception, then I try reconnect, and get exception by…
Serhii
  • 47
  • 5
1 2 3
…
57 58