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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Setting up a Redundant Sql Server 2008 Configuration While Retaining High Performance and Minimal Downtime

We have a situation where we are moving to a new hosting facility and are attempting to configure our new database environment. However, none of us are formal DBA's so a lot of what we are doing is ...
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1answer
683 views

Experience using ScaleArc in test or production?

Has anyone had any experience using ScaleArc? My CTO has asked my thoughts on it, and I have seen no information out there regarding real-world experiences.
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1answer
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TempDB on Solid State Drives on SQL Server Cluster

Can solid state drives be used for the TempDB on a SQL Server failover cluster if they are local drive on both machines? It is supported in 2012 but our cluster is a SQL 2005. The application that it ...
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Does Change Data Capture (CDC) work in a SQL Server 2012 AlwaysOn Failover Cluster Instances setup?

Does Change Data Capture (CDC) work in a SQL Server 2012 AlwaysOn Failover Cluster Instances setup? There would be two nodes in the AlwaysOn Failover Cluster Instances setup and two Domain ...
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2answers
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SQL Server cluster questions please

We have SQL Server 2008 R2 cluster active/active/active (a, b, c) and three instances run on this environment. We did a test on one of the instances, and failover test. Manual failover from node c ...
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Syncing two (or more) PostgreSQL 9.1 clusters

This question assumes the use of PostgreSQL 9.1. Say I have two PostgreSQL database clusters. Each cluster contains three PostgreSQL servers. A master, a slave synced via synchronous replication and ...
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2answers
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How to sync two MySQL high load tables with 10M rows?

I have two identical MySQL innodb table with 10M rows each. One is used at backend while other at application end. Thus, either of them loaded. I need to synchronize them in a way which is fast and ...
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2answers
545 views

Can I implement clustering with just 2 servers and one NAS?

I have the following architecture, it consists in only 2 servers, connected to a NAS. I'm having trouble in implementing clustering because I can't have a domain controller in any of them (if I do ...
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1answer
208 views

Perfmon and SQL Server Clustering

I'll be going onsite to run some performance tests for a client. They have a Windows Failover Cluster, which has a clustered instance of SQL Server. Let's assume for this post that my client's ...
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1answer
80 views

Temporarily splitting a SQL Server cluster

I currently have a pair of database servers up and running separately, but with the same structure and (hopefully) the same data on both of them. The applications that utilize the data from these ...
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1answer
31 views

Simultaneous money withdrawls from a distributed/replicated database

Lets say I have $10 in my bank account. The database is replicated in North America and Asia. At the exact same time I do a withdrawl of $10 in N. America and in Asia, meaning that my withdraw would ...
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Failover Cluster and AlwaysOn Availability Groups across Data Centers

We have two 3 node clusters in separate data centers, let's call them ClusterP and ClusterS. ClusterP is our primary and ClusterS is our secondary for disaster recovery. Each cluster has multiple ...
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2answers
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SQL Server 2008 upgrade to SQL Server 2012 on a cluster

I have a Windows 2008R2 2 node cluster with SQL Server 2008 clustered. How do I prevent the cluster from failing over while I am applying the SQL Server 2012 to the alternate node first? Any pointers ...
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1answer
547 views

When changing startup parameters on a cluster, does each node have to be updated manually?

When moving a SQL 2005 instance to new disks on a two-node Windows 2003 cluster, I changed startup params on the active node to reflect the new paths for the master DB files and error logs. I ...
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1answer
861 views

Moving DBs (including System DBs) to new LUNs on a single node cluster

We have a single node cluster (SQL2K8 R2) currently utilizing storage on our old SAN. We'd like to migrate to storage on the new SAN without rebuilding or moving the user DB. The infrastructure ...
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1answer
559 views

AlwaysOn Availability Groups: Confusion with some concepts

In Sql Server 2012, I am trying to install Failover Clustering to configure AlwaysOn Availability Groups. When I run Cluster Validation test wizard, it comes back with a lot of errors. One of them ...
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1answer
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How many database licenses do we need for setting 2 servers (nodes) into a cluster?

Suppose we have a server that has only 1 CPU with 1 core, so we need 1 Oracle database license for installing a database into it. Now, if we would need to add a second server, combine them into ...
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1answer
179 views

sql server active active configuration with same database names

I have a SQL Server 2008 Enterprice in a clustered environment and in active-active mode. By active-active mode i mean that both instances are active and serving requests to their databases. ...
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1answer
924 views

ODBC Connection As Clustered Resource

First step in a long process of creating a Linked Server to an Informix database on a Sql 2008 (Win 2003 x64) cluster. I was wondering how to go about creating an ODBC connection as a clustered ...
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1answer
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What operating systems are certified for Oracle 11gr2 RAC?

How can this information be found?
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1answer
173 views

How important is the build number on a SQL Cluster

I did not actually perform this install, nor am I responsible for fixing issues on this particular cluster. I just happen to be checking it and found some things that puzzle me. My point in this is ...
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2answers
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Disabling sql services while performing maintenance on SQL Server 2008 R2 cluster

Our storage team is performing updates on an MPIO driver for our SQL Server 2008 R2 cluster. They suggested disabling the sql server service on the node they are doing the update on - will disabling ...
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1answer
61 views

Agent service account shows as not clustered

One of the SQL Server 2008 R2 instances I administer is running on a two node Windows Cluster (Windows Server 2008 R2 Enterprise) When I run the DMV sys.dm_server_services, SQL Server Service Account ...
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1answer
712 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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1answer
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what is the right way to restart a mariadb galera cluster?

I am trying to restart cluster. I have two problems in stopping cluster and starting cluster In stopping cluster, I follow the instruction ...
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1answer
212 views

Need scalable database solution for very big automated data entry database

I've been working on MySQL database in simple web applications for a long time and i now have a project which should maintain about 1,000 up to 10,000 query per minute (it is some logging database ...
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1answer
360 views

Complete Failover Cluster Failure SQL Server 2012

We have experienced a full cluster failure on our 3 node cluster running SQL Server 2008 R2 with 7 SQL Server instances. It started when we rebooted one of the nodes and it returned an error: Node ...
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1answer
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Problem adding a new node to a SQL Server 2012 Failover Cluster

I tried to add a new node to SQL Server (2012 Standard) Failover, that is already installed on another node in Windows2012 Failover Cluster I have an issue with non editable field wiht input for SQL ...
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2answers
205 views

Teaching Slony replication to select slave nodes

There is a system with up to 256 nodes in db cluster. We need to replicate some data from one of them across to all others. But for every row to replicate there is a list of nodes where it must be ...
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1answer
298 views

Cluster communication - SQL Server Failover Cluster

I am running a lab enviornment on my laptop two node SQL 2008 R2 running on windows 2008 R2 clustered Vms Based on my understanding a) Public Network or all Communication network I see checkbox ...
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1answer
335 views

Redesigning a multi-instance MySQL server for performance and resiliency

I've got a single MySQL server which currently runs N separate MySQL instances on, which are rapidly growing beyond the capabilities of that box. Is it possible to have an active-active MySQL ...
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1answer
672 views

Dual management node for mysql clustering

I currently have mysql cluster setup and running. Here is my current setup: 1 - management node 2 - data nodes 2 - mysql nodes I wish to incorporate a failover for the management node. The ...
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1answer
261 views

SQL Server Cluster Failover Making DB Inconsistency Error

I encountered the following DB tables inconsistency error whenever I do a cluster 'move' over from Server-A to Server-B and then do a DBCC CHECKDB on the database in Server-B: SQL Server detected ...
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PostgreSQL Streaming Replication Tools - Windows

Is there any clusterware available for PostgreSQL clusters running on Windows OS? I'm specifically interested in automatic failover and STONITH functionality. I've done a fairly extensive Google ...
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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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Multi-Instance Windows Failover Cluster - Min / Max Memory Allocation Dilemma

We run numerous 2 node SQL Server 2008 R2 Failover Clusters in Windows Server 2008 R2 on a VMWare eSXi virtual platform. Each cluster hosts 3-4 SQL instances with varying degrees of memory ...
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1answer
429 views

Mysql Cluster vs Percona/Maridb Cluster [closed]

We want to setup a mysql cluster with master-master sync replication, to provide HA so that one db for write from one app, other for write from other app. It is a webapp with high write and medium ...
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0answers
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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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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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1answer
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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
399 views

Move DTC from one node to another in Windows 2003 R2 Clustering

I have a Windows 2003 R2 two node cluster that is running MSDTC as part of the Cluster Group. Is it possible for me to change the current MSDTC owner without moving the entire Cluster Group to the ...
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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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3answers
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Best architecture solution for heavy data mining system, that can run on cloud

We are currently hosting our MySQL database on a dedicated server with lots of memory and processors. We would like to push it to a different architecture that would allow us to scale it easily, ...
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1answer
34 views

Sql Server Licensing & Clustering for AlwaysOn

For Sql Server 2014, reading these MSDN link and Microsoft PDF file about licensing, created a couple of questions. For AlwaysOn do we need WSFC or FCI? How are WSFC and FCI different? If we only ...
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1answer
46 views

SQL Cluster, AlwaysOn AG, or Something Else? [closed]

I really needs some help with Setting up SQL servers. We are re-configuring our network and have no clue how to resolve our SQL issue. My Network Admin. wants an "Active/Active" with shared storage ...
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1answer
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Is MSDTC required for SQL Server 2012 Fail Over Cluster?

I am making a 2 node SQL Server 2012 Fail Over Cluster, do I need to install MSDTC also? If yes then can both be installed on single shared disk?
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Understanding disk requirement to make fail over cluster

Please take a look at the following screenshot. I am trying to make SQL Server 2012 Fail Over Cluster using two nodes. As you know we need to have a shared SAN which will be used by both nodes to ...
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2answers
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Is it possible to remove a database server from a cluster resource, but keep it running on the node

I was wondering if anyone knew whether it was possible to delete the cluster resource, but keep all of the disks and sql instance running on the node instead? So if I was to delete the cluster ...
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Can I install an additional oracle database on one node of an oracle cluster (RAC)?

Let's say I have a two-node Oracle RAC environment. Can I install an additional Oracle database on one of the node? Thanks.
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Is Service Pack 2 completely installed on Passive Node of SQL Server 2012 Instance?

We are applying SQL Server 2012 Service Pack 2 (SP2) to a two-node active/passive cluster, starting with the passive node (as per best practices): How to install a Service Pack at a SQL Server 2012 ...