High-availability technologies mask the effects of hardware or software failure, so that perceived downtime for users and applications is minimized.

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Maintain Up-To-Date Copy of Very Large Table if Clustering/Partitioning/Moving Operation Needs to be Killed/Rollback

I've appended the following information in a previous post but I asked the 'why' instead of the 'how'. So here's the question... SQL Server 2014, CU6. 4.5 TB database, Simple recovery. The most ...
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1answer
992 views

Removing secondary replica from SQL Availability Group causes large log file

Due to an unforeseen hardware error, I had to take our secondary replicas down for maintenance. This was really due to a storage issue and, it was decided at a higher level, to purchase a new storage ...
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1answer
2k views

PgPool 2 with HA Proxy

So, I'm looking to add high availability to a postgresql server. I've looked into some tutorials on the web but, haven't been able to find exactly what I'm looking for. E.g.: PostgreSQL ...
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1answer
102 views

Reporting services - High availability setup - SQL server 2012

I need some guidance on best practices and setup for SSRS. I have a SQLServer 2012 setup with data source on 1 instance and SSRS on a separate server. There is a need to setup HA and I understand what ...
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1answer
53 views

How to make distributor highly available in Always On Configuration

We have clients requested us to configure Always on with Replication. Microsoft does not support it. "The distributor should not be a host for any of the current (or intended) replicas of the ...
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1answer
47 views

Where to look for Agent history in Replication?

In SQL server 2008R2 replication configuration, "agent history cleanup distribution" job by default runs every 10 minutes and deletes any historical data older the 48hrs. If I increase the retention ...
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1answer
113 views

Need help achieving HAProxy active/passive configuration for mysql

I'm using HAProxy for mysql database backends. The database had to be master-slave. The goal is to point all mysql clients at the proxy and for all requests to go to mysql server #1 and only go to ...
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1answer
22 views

When you use a replica to backup from so you don't have to turn off the master, is this considered High Availablity?

I read somewhere that MySQL can have a master / slave setup in which the master database can continue to run live and in production while the slave database can be turned off to snatch a backup. And ...
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1answer
67 views

SQL database disaster recovery in a second datacenter using storage

I have the following: Data Center (1) has a set of two Microsoft SQL Server databases. They are clustered using MSCS and shared NetApp storage FAS3250 system. This provides me with local fail-over / ...
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0answers
642 views

AlwaysOn Availability Group error after Windows Update in environment without a failover cluster

Our SQL Server service was down this morning which brought down some of our websites. When I went to check the Windows Event Viewer I saw the following errors: Script level upgrade for database ...
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0answers
163 views

ENABLE_BROKER vs NORECOVERY

I have two nodes with MSSQL2012 which work with AlwaysOn High Availability After some crash I had to remove db from availability group on the one of the nodes. For restoration I've made backup ...
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0answers
31 views

Alwayson cannot fail over using tsql

I have an Alwayson test environment with the following settings. My test goals are as follows: When SqlNod1 is primary instance, I want SqlNod2 to answer read-only queries. When SqlNod2 is primary ...
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0answers
173 views

AlwaysOn FCI + HA Setup Question

I am planning to create FCI + HA solution in the same datacenter, but running into some problems. I'd really appreciate if someone can provide some guidance. Here is the current configuration (All ...
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0answers
220 views

dropping and adding subscription only picking up new article on some subscribers

I have used the following script to drop aand re-add a table from a subscription so I could move replace the ntext fields with nvarchar(max) columns. the script worked fine, but when I ran the ...
2
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0answers
1k views

SQL Server connection with multiSubnetFailover fails, claims mirroring is enabled

I have two SQL Server instances in an availability group. They are not mirrored. I'm trying to connect to the AG using the MS JDBC drivers (4.0) with a connection string including ...
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0answers
705 views

SQL Server Database Mirroring : strange client application behavior upon failover

I am putting a HA SQL server environment up based on three SQL Server 2008 R2 machines and database mirroring. I'll name them : principal.company.intra mirror.company.intra witness.company.intra ...
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0answers
101 views

how to get pgpool2 HA

I am using pgpool2 and PostgreSQL to get a HA of postgresql service. I have been working in this: .-----. .--------. | | W | DB | | PGP ...
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0answers
37 views

Windows Clustering 2008 R2

I'm trying to build a Windows cluster with 3 nodes, 2 Active and 1 Passive, And If I have to build in a way like N1 Active - N3 Passive will be refer as "cluster network 1" and N2 Active and N3 ...
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0answers
2k views

High availability PostgreSQL 9.3 server on Windows

I'm trying to set up PostgreSQL 9.3 server in HA mode on 2 Windows servers. Final solution should be deployed to Microsoft azure network, so there are few limitations. Since Microsoft is doing ...
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0answers
25 views

Problem Setting up MariaDB Spider HA

I have problem setting MariaDB with Spider for partitioning and HA.My environment consists of: Spider Proxy - 10.64.20.207 Backend1 - 10.64.20.208 Backend2 - 10.64.20.209 First I am creating user ...
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0answers
101 views

Couldn't setup postgresql cluster with heartbeat pgsql ra

I'm trying to install postgresql cluster with the following configuration: 2 virtual hosts with RHEL 6.6 x64: postgresql 9.1 with hot standby replication pacemaker 1.1.12 resource-agents 3.9.6 I ...
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0answers
127 views

Is Automatic failover is possible in pgpool?

I have setup the 2 PostgreSQL 9.4 severs with master-slave(Hot standby streaming replication).Is this possible in pgpool-II 3.4 to configure,where it works for automatic failover(network or hardware ...
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0answers
38 views

Fencing a failed application node to isolate it from SQL Server

I have a multi-node server application that is backed by SQL Server 2012, often in a clustered or AlwaysOn AG/FCI HA configuration. My application monitors the health of the application nodes (not the ...
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0answers
35 views

Need a High available for Database : HA clustering vs failover with mysql utilities

I intend to setup a high available for database system, I have 2 solutions here : Set up a HA clustering with heartbeat and share storage for 2 nodes as master(to storage the configuration and data ...
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0answers
71 views

migrate standalone postgresql database cluster to high availability cluster

We have tested one setup of postgres HA with repmgr and pgpool. It is working fine and now we have to migrate our existing database to the HA setup. We have two approaches, Make the HA master as ...
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0answers
177 views

how to change the backend order in pgpool

I want to change the backends order in pgpool. I want to keep my master host always as the first backend. I have been configure the failover command: NEW_MASTER_INFO=($(PcpNodeInfo ...
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0answers
62 views

when install pgpool is also needed install hearbeat and watchdog

I am trying to get the PostgreSQL services High Availability (HA) and then I am using pgpool-II. When I install and configure pgpool, the WATCHDOG section seems to doesn't works, then I have a ...
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0answers
331 views

Configuring multiple listeners on SQL Server 2012 through High Availability

We have configured two SQL servers on Azure and they are in HA. There are about 10 databases and we wanted to have two critical ones on one dedicated HA group. The listener worked fine until we ...
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0answers
223 views

High Availability in PostgreSQL with automated failover

I am currently working on designing an architecture for High Availability in PostgreSQL for a database of approximately 5TB in size. Also, I would like to re-direct my reads to a slave node(preferably ...
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0answers
110 views

Recommended plan for 0min RTO and RPO

I have a Windows Server 2008R2 Server, running SQL Server 2008R2 SP2. The server currently only does a full backup once daily. The server's operational hours are between 8am and 5pm. The server's new ...
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0answers
215 views

Streaming Replication Resource Management (PGSQL) on FreeBSD 8.x

I am attempting to set up PGSQL-HA streaming replication on freeBSD 8.2 (willing to upgrade to 8.4 if need be). The set up is simple: 2 nodes, one active one standby. I have successfully set up ...
0
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0answers
121 views

Synchronization between master and backup server

I am searching for an option to synchronize data between production server and backup server automatically. Does somebody know a method, how I can do this: if I delete, insert or update a record it ...
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0answers
205 views

How to setup a Postgres-xc streaming replication with master-slave(for HA)?

Can you guys please help me about how to make streaming replication with master-slave configuration using Postgres-xc to confirm an HA environment? Thanks