A cluster consists of a group of computers connected so that in many respects they can be viewed as a single system.

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Active/ Active SQL Server Clustering on AWS

I need to design and implement a highly available SQL Server 2012 clustering on Amazon AWS. In the white paper presented by Amazon, they provided an example of Active/ Passive SQL Cluster. Do you know ...
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1answer
1k views

Problems with clustered DTC server 2008 R2 when failed over or restarted

I had a working clustred DTC, but due to a disk migration, I had to delete the service and recreate it. Thats how the problem started. When I recreate the service, it comes online perfectly. But when ...
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1answer
1k views

SQL Cluster Resources Disappear After Removing Disk Resource

In the process of removing an usused disk resource from cluster, I would follow these steps: 1) remove dependencies on the disks by the SQL Server resource, 2) take the disk resource offline, 3) ...
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1answer
22 views

What is exactly a uniform server in a galera cluster setup?

In many manuals about performance tuning and avoid Galera's MySQL cluster limitations they write the below suggestion. It is possible for a slow/overloaded master node to affect performance of ...
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1answer
35 views

Cannot start MySQL Cluster Management Service

Could not determine which nodeid to use for this node. Specify it with --ndb-nodeid= on command line. This is what EventViewer is saying
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2k views

Event 4104, MSDTC Client 2

I have an Active/Active Sql 2008 R2 cluster that I monitor with Idera Sql Diagnostic Manager. It just started reporting that one of the instances does not have DTC or Sql Server Agent installed. I've ...
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619 views

MS SQL Server 2012 Failover Cluster connection issue

I was about to give up with this but I'll give it a go here if anyone can help. I've set up a fail-over cluster SQL Server with 2 SQL nodes, Domain controller and file witness. All seems to work ...
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166 views

How to use Blob Storage as shared storage in a Windows Azure Failover Cluster?

In the context of SQL Server 2012 Standard Edition, is it possible to make Azure Blob storage available to a SQL Failover cluster directly as a shared SCSI resource on a Windows Cluster composed on ...
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108 views

Are there any best practices before moving SQL Server to another node (controlled failover)?

Let's say there are multiple jobs running on the SQL Server - we have index maintenance jobs, backups, replication, etc. We would like to perform a switchover using Failover Cluster Manager. Are there ...
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68 views

Multiple IPs registered for listener when using AlwaysOn AGs w/ multi-subnet clustering

We are testing AlwaysOn Availability Groups on a WSFC multi-subnet cluster and using dynamic DNS registration. Our issue is that sometimes the IP for the Availability Group Listener (AGL) in the ...
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51 views

“Skipping the default startup of database” SQL notification for AlwaysOn Cluster

So I set up our SQL servers to notify us of alerts at severity 17 or higher (as advised by various SQL Server articles). I've done this to each node of a SQL Server Always On Availability Cluster, ...
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93 views

Prevent SQL Server failback after cluster aware updating

We have SQL Server 2012 in a two-node cluster with Windows Server 2012 (node and disk majority). Neither of the nodes are marked as preferred owner and the "Prevent Failback" option is selected. ...
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63 views

Failover cluster connection issue

I'm trying to run SQL Server Failover cluster in Azure. I have NODE1 and NODE2 in a cluster and another SERVER in the same network trying to connect to the database server using the instance from ...
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162 views

MariaDB Galera Cluster

I have two mariadb servers in cluster that is working galera and xtradb. it is my primary server configuration: [mysqld] datadir=/var/lib/mysql query_cache_size=0 binlog_format=ROW ...
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484 views

SQL Server Configuration Manager 2012 - TCP/IP, unable to set IP All = No

I have a 4-node SQL Server 2012 SP1 cluster, and under Network Configuration -> TCP/IP -> Protocol (tab), I am able to switch Listen All from Yes to No. However, when I hit OK (or Apply), I get the ...
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412 views

Postgres database zero down time production deployment

I need some idea about how I can deploy a financial application in production environment using PostgreSQL DB with zero down time. I have two servers in Master-Slave design. Currently I am giving ...
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35 views

Data mirroring suggestions

On my test environment, I have a SQL 2012 2-node physical cluster that accesses a common iSCSI storage on a separate Windows Server 2012 box. What options are there if I want to backup this storage to ...
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1k 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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57 views

Upgrade/migrate a Microsoft Cluster

We currently have active/active windows 2008 cluster hosting 2 instances of SQL 2008 R2. We have a new hardware for windows 2012 clustering. We want to use this new hardware to upgrade the ...
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450 views

Error installing Clustering with SQL Server 2012 on Windows Server 2012

We are installing SQL Server 2012 on Windows Server 2012 and trying to accomplish clustering. We've setup all the core functionality on the servers: advanced cluster preparation on all nodes and ...
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413 views

How to shut down clustered SQL Server 2008 R2 with NOWAIT?

Is it possible to shutdown with nowait on a clustered instance? I want to delay recovery to when the instance starts, and I want to shut down as quickly as possible without issuing checkpoints to my ...
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159 views

Error in alter table reorganize partition for MySQL Cluster

My cluster contains 48 million rows and cluster contains 4 storage nodes . After that I add online storage node and executed alter table 'customer_tbl' reorganize partition. Some parameters of ...
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45 views

when can AG primary replica be a different host to WFC primary?

To set up an Availability Group with two servers, the servers both participate in a Windows Failover Cluster. I've seen cases after certain failover modes where the primary IP address in the cluster ...
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34 views

ComputerNamePhysicalNetBIOS and “Current Host Server” shows different machines

I have a SQL Server 2008 R2 instance on a two node (say names X and Y) windows server cluster (Windows Server 2008 R2 Enterprise). Server Manager on both nodes shows 'X' as the 'Current Host ...
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15 views

SQL nodes in MySQL Cluster

I running mysql cluster in windows 8.1 on 3 machines 2 mngmd 2 sql node 3 data nodes in the first machine I tried to connect MySQL server with localhost and tried to put my old database it ...
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24 views

Understanding flow control in MariaDB Galera Cluster?

I am not clear how node state changed. What is the different between node state: JOINED, SYNCED, DONOR/DESYNCED, CLOSED, DESTROYED. These are all state I see in log. I am using MariaDB Galera Cluster ...
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26 views

Migrate from Percona Cluster to MariaDB Cluster

We are at present running latest version (5.6) of Percona Cluster. Since 5.6 upgrade we are having major stability problems and all minor updates are getting worse. Is there any possibility of ...
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177 views

Cassandra cluster on Windows Machine

I am new to Cassandra, and have been trying to create a cluster using DevOps. When I add a node , I get the following error: Error provisioning cluster: Unable to SSH to some of the hosts ...
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155 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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12 views

What is the preferred mode of replication for a MySQL Cluster?

Reading about MySQL Cluster, I'd like to know about what are the preferred models of replication. I understand that it supports asynchronous replication out of the box, but I'm not sure of how it ...
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152 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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60 views

Is there a way to synchronise 2 postgresql server that may be deconnected and modified?

I would like to know if there is a way to use a cluster / replication mecanism that can manager deconnection and modification while deconnected. Say I have server A and B, they see each over, cluster ...
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36 views

Migrating a SQL NetName Between Clusters

Instance A is a default SQL Server 2005 instance on a two-node Windows 2003 cluster. Instance B is a default SQL Server 2012 instance on a two-node Windows 2008 R2 cluster. The application team is ...
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221 views

Create a high availability cluster configuration PostgreSQL for Windows

I want a server to be replicated, here is the scenario: When my primary server goes down or fail I want the secondary or the standby server to take over, I'm using Windows 7 for the primary server, ...
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192 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
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337 views

PostgreSQL: Slave doesn't replicate the Master's data

I'm using PostgreSQL 9.2.3 on both computers, both of which run Win2008R2. I've setup streaming replication by following this guide: ...