HA/DR refers to High Availability / Disaster Recovery, which is typically a suite of technologies provided by a database engine vendor with the aim of increasing availability of data stored in the database, and providing a fast method of return-to-service after a disaster.

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Change column from NOT LOGGED to LOGGED

I have a database DAT1 running on DB2 version 10.5. I want to enable logging for all CLOB and BLOB columns of my table TAB1. The table was initially created with those columns as NOT LOGGED but now I ...
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HADR procedures

We are thinking of a SQL Server 2014 + Windows Server 2012 configuration for a HADR scenario. My questions are: on a HA scenario, how does the primary server get updated once it is again available ?...
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HADR high worker thread usage

Why would an availability group's number of worker threads in an HADR pool increase well beyond minimum usage of "typically, there are 3–10 shared threads" per replica? In one case we've observed ...
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SQL Availability Group restore database to standalone server

Running: SQL Server 2012, Windows Server 2008 R2 I want to test a backup by restoring onto an isolated server. The backup was taken from an Availability Group (HADR) configuration, but the target ...
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SQL Server Management Studio with Multi subnet HADR cluster

We are starting to deploy Multi-Subnet HADR AlwaysOn clusters for our environment. Using MultiSubnetFailover=True in application connection strings works. However, SSMS connections require manual ...
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3k views

How to Start DB2 10.5 HADR on the Standby Database

I am trying to set up HADR to run on my DB2 10.5 DB2 servers. I believe I have followed the steps correctly, but I'm getting the following error: [db2insh1@rslvm20 OneView]$ db2 restore database ...
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3answers
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AlwaysOn Architecture - SQL Server 2012 for creating a dev environment?

I was thinking if the AlwaysOn architecture in SQL Server 2012 can be leveraged somehow to create a replica for DEV and QA environment properly in addition to setting up HADR using the same ...
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Removing Databases in Recovery Pending Status after AG group was removed

I have removed a High Availability Group, disabled the option in sql configuration manager and restarted and I have also removed the Failover cluster components from windows and restarted. ...
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IBM DB2 v9.7 HADR TSA failure on the standby server

I have an environment here where I have 2 servers running DB2. One is the primary and the other one is standby. They replicate with HADR and failover is made automatically by TSA. What's the default ...